Scientific Reports Physics Table of Contents e-alert: December 2013

01 December 2013      • Visit Scientific Reports • Submit your manuscript to Scientific Reports     Welcome to your Table of Contents e-alert for Scientific Reports         A simple symmetry as a guide toward new physics beyond the Standard Model (open access) In this mini review article from Frontiers in Physics, S. Khalil and S. Moretti discuss a minimal extension of the Standard Model, based on a somewhat larger version of its symmetry structure and particle content, that can naturally explain the existence of neutrino masses while also predicting novel signals accessible at the LHC, including a light Higgs boson, as evidenced by current data.           Physical Sciences               Superconductivity in anti-post-perovskite vanadium compounds ▶     Bosen Wang, Kenya Ohgushi     Superconductivity, which is a quantum state induced by spontaneous gauge symmetry breaking, frequently emerges in low-dimensional materials. Hence, low dimensionality has long …             Optomechanical interface for probing matter-wave coherence ▶     André Xuereb, Hendrik Ulbricht, Mauro Paternostro     We combine matter-wave interferometry and cavity optomechanics to propose a coherent matter–light interface based on mechanical motion at the quantum level. We demonstrate a …             A new cathode material for super-valent battery based on aluminium ion intercalation and deintercalation ▶     Wei Wang, Bo Jiang, Weiyi Xiong et al.     Due to their small footprint and flexible siting, rechargeable batteries are attractive for energy storage systems. A super-valent battery based on aluminium ion intercalation and …             In-situ device integration of large-area patterned organic nanowire arrays for high-performance optical sensors ▶     Yiming Wu, Xiujuan Zhang, Huanhuan Pan et al.     Single-crystalline organic nanowires (NWs) are important building blocks for future low-cost and efficient nano-optoelectronic devices due to their extraordinary properties. …             Cell electrofusion using nanosecond electric pulses ▶     Lea Rems, Marko Ušaj, Maša Kandušer et al.     Electrofusion is an efficient method for fusing cells using short-duration high-voltage electric pulses. However, electrofusion yields are very low when fusion partner cells …             High-Throughput Nanofabrication of Infra-red and Chiral Metamaterials using Nanospherical-Lens Lithography ▶     Yun-Chorng Chang, Sih-Chen Lu, Hsin-Chan Chung et al.     Various infra-red and planar chiral metamaterials were fabricated using the modified Nanospherical-Lens Lithography. By replacing the light source with a hand-held ultraviolet …             Solution-processed small-molecule solar cells: breaking the 10% power conversion efficiency ▶     Yongsheng Liu, Chun-Chao Chen, Ziruo Hong et al.     A two-dimensional conjugated small molecule (SMPV1) was designed and synthesized for high performance solution-processed organic solar cells. This study explores the photovoltaic …             Enhanced Detection Efficiency of Direct Conversion X-ray Detector Using Polyimide as Hole-Blocking Layer ▶     Shiva Abbaszadeh, Christopher C. Scott, Oleksandr Bubon et al.     In this article we demonstrate the performance of a direct conversion amorphous selenium (a-Se) X-ray detector using biphenyldisnhydride/1,4 phenylenediamine (BPDA/PPD) polyimide …             Early-warning signals of topological collapse in interbank networks ▶     Tiziano Squartini, Iman van Lelyveld, Diego Garlaschelli     The financial crisis clearly illustrated the importance of characterizing the level of ‘systemic’ risk associated with an entire credit network, rather than with single …             Highly Tunable Aptasensing Microarrays with Graphene Oxide Multilayers ▶     Yun Kyung Jung, Taemin Lee, Eeseul Shin et al.     A highly tunable layer-by-layer (LbL)-assembled graphene oxide (GO) array has been devised for high-throughput multiplex protein sensing. In this array, the fluorescence of …             Controlling chloride ions diffusion in concrete ▶     Lunwu Zeng, Runxia Song     The corrosion of steel in concrete is mainly due to the chemical reaction between the chloride ions and iron ions. Indeed, this is a serious threaten for reinforced concrete …             Polymer-Free Optode Nanosensors for Dynamic, Reversible, and Ratiometric Sodium Imaging in the Physiological Range ▶     Timothy T. Ruckh, Ankeeta A. Mehta, J. Matthew Dubach et al.     This work introduces a polymer-free optode nanosensor for ratiometric sodium imaging. Transmembrane ion dynamics are often captured by electrophysiology and calcium imaging, but …             Anthocyanin-dependent anoxygenic photosynthesis in coloured flower petals? ▶     Vladimir Lysenko, Tatyana Varduny     Chlorophylless flower petals are known to be composed of non-photosynthetic tissues. Here, we show that the light energy storage that can be photoacoustically measured in flower …             Slow-spinning low-sideband HR-MAS NMR spectroscopy: delicate analysis of biological samples ▶     Marie Renault, Laetitia Shintu, Martial Piotto et al.     High-Resolution Magic-Angle Spinning (HR-MAS) NMR spectroscopy has become an extremely versatile analytical tool to study heterogeneous systems endowed with liquid-like dynamics. …             Designing novel bulk metallic glass composites with a high aluminum content ▶     Z. P. Chen, J. E. Gao, Y. Wu et al.     The long-standing challenge for forming Al-based BMGs and their matrix composites with a critical size larger than 1 mm have not been answered over the past three decades. In this …             EFM data mapped into 2D images of tip-sample contact potential difference and capacitance second derivative ▶     S. Lilliu, C. Maragliano, M. Hampton et al.     We report a simple technique for mapping Electrostatic Force Microscopy (EFM) bias sweep data into 2D images. The method allows simultaneous probing, in the same scanning area, of …             Discontinuous Spirals of Stable Periodic Oscillations ▶     Achim Sack, Joana G. Freire, Erik Lindberg et al.     We report the experimental discovery of a remarkable organization of the set of self-generated periodic oscillations in the parameter space of a nonlinear electronic circuit. When …             Broadband evolution of phononic-crystal-waveguide eigenstates in real- and k-spaces ▶     P. H. Otsuka, K. Nanri, O. Matsuda et al.     Control of sound in phononic band-gap structures promises novel control and guiding mechanisms. Designs in photonic systems were quickly matched in phononics, and rows of defects …             C. elegans sensing of and entrainment along obstacles require different neurons at different body locations ▶     Seong-Won Nam, Chen Qian, So Hyun Kim et al.     We probe C. elegans mechanosensation using a microfabricated platform where worms encounter a linear array of asymmetric funnel-like barriers. We found that sensing of and moving …             Influence of doping on charge carrier collection in normal and inverted geometry polymer:fullerene solar cells ▶     George F. A. Dibb, Mathis-Andreas Muth, Thomas Kirchartz et al.     While organic semiconductors used in polymer:fullerene photovoltaics are generally not intentionally doped, significant levels of unintentional doping have previously been …             The Infinite Possible Growth Ambients that Support Single-Wall Carbon Nanotube Forest Growth ▶     Hiroe Kimura, Jundai Goto, Satoshi Yasuda et al.     We report the virtually infinite possible carbon feedstocks which support the highly efficient growth of single-wall carbon nanotubes (SWCNTs) using on the water-assisted chemical …             Systematic Conversion of Single Walled Carbon Nanotubes into n-type Thermoelectric Materials by Molecular Dopants ▶     Yoshiyuki Nonoguchi, Kenji Ohashi, Rui Kanazawa et al.     Thermoelectrics is a challenging issue for modern and future energy conversion and recovery technology. Carbon nanotubes are promising active thermoelectic materials owing to …             Complex spectral evolution in a BCS superconductor, ZrB12 ▶     Sangeeta Thakur, Deepnarayan Biswas, Nishaina Sahadev et al.     We investigate the electronic structure of a complex conventional superconductor, ZrB12 employing high resolution photoemission spectroscopy and ab initio band structure …             Spatial Terahertz Modulator ▶     Zhenwei Xie, Xinke Wang, Jiasheng Ye et al.     Terahertz (THz) technology is a developing and promising candidate for biological imaging, security inspection and communications, due to the low photon energy, the high …             Li-rich Thin Film Cathode Prepared by Pulsed Laser Deposition ▶     Binggong Yan, Jichang Liu, Bohang Song et al.     Li-rich layer-structured cathode thin films are prepared by pulsed laser deposition. X-ray diffraction (XRD), field emission scanning electron microscope (FESEM), X-ray …             Is Chemically Synthesized Graphene ‘Really’ a Unique Substrate for SERS and Fluorescence Quenching? ▶     Sanchita Sil, Nikki Kuhar, Somnath Acharya et al.     We demonstrate observation of Raman signals of different analytes adsorbed on carbonaceous materials, such as, chemically reduced graphene, graphene oxide (GO), multi-walled …             Formation of Nanofoam carbon and re-emergence of Superconductivity in compressed CaC6 ▶     Yan-Ling Li, Wei Luo, Xiao-Jia Chen et al.     Pressure can tune material's electronic properties and control its quantum state, making some systems present disconnected superconducting region as observed in iron chalcogenides …             Particle Focusing in Curved Microfluidic Channels ▶     Joseph M. Martel, Mehmet Toner     The decoupled effects of Reynolds and Dean numbers are examined in inertial focusing flows. In doing so, a complex set of inertial focusing behavioral regimes is discovered within …             CO2 phonon mode renormalization using phonon-assisted energy up-conversion ▶     Nabila Tanjeem, Tadashi Kawazoe, Takashi Yatsui     Molecular dissociation under incident light whose energy is lower than the bond dissociation energy has been achieved through multi step excitation using a coupled state of a …             Thermoelectricity in atom-sized junctions at room temperatures ▶     Makusu Tsutsui, Takanori Morikawa, Akihide Arima et al.     Atomic and molecular junctions are an emerging class of thermoelectric materials that exploit quantum confinement effects to obtain an enhanced figure of merit. An important …             Gradient Confinement Induced Uniform Tensile Ductility in Metallic Glass ▶     X. L. Lu, Q. H. Lu, Y. Li et al.     Metallic glass (MG) generally fails in a brittle manner under uniaxial tension loading at room temperature. The lack of plastic strain of MG is due to the severe plastic …             Entropy and order in urban street networks ▶     Agust Gudmundsson, Nahid Mohajeri     Many complex networks erase parts of their geometry as they develop, so that their evolution is difficult to quantify and trace. Here we introduce entropy measures for quantifying …             One-Step to Prepare Self-Organized Nanoporous NiO/TiO2 Layers and its Use in Non-Enzymatic Glucose Sensing ▶     Zhi-Da Gao, Yuyao Han, Yongmei Wang et al.     A highly ordered nanoporous NiTi oxide layers were fabricated on Ti alloys with high Ni contents (50.6 at.%) by a combination of self-organizing anodization at 0°C and subsequent …             Towards Visible Light Hydrogen Generation: Quantum Dot-Sensitization via Efficient Light Harvesting of Hybrid-TiO2 ▶     Kwanghyun Kim, Myeong-Jong Kim, Sun-I Kim et al.     We report pronounced enhancement of photoelectrochemical hydrogen generation of a quantum dot-sensitized hybrid-TiO2 (QD/H-TiO2) electrode that is composed of a mesoporous TiO2 …             Mapping three-dimensional temperature in microfluidic chip ▶     Jinbo Wu, Tsz Yan Kwok, Xiaolin Li et al.     Three-dimensional (3D) temperature mapping method with high spatial resolution and acquisition rate is of vital importance in evaluating thermal processes in micro-environment. We …             Stationary distribution of self-organized states and biological information generation ▶     Hyung Jun Woo     Self-organization, where spontaneous orderings occur under driven conditions, is one of the hallmarks of biological systems. We consider a statistical mechanical treatment of the …             Carbon nanowalls: the next step for physical manifestation of the black body coating ▶     V. A. Krivchenko, S. A. Evlashin, K. V. Mironovich et al.     The optical properties of carbon nanowall (CNW) films in the visible range have been studied and reported for the first time. Depending on the film structure, ultra-low total …             Novel Erythrocyte-like Graphene Microspheres with High Quality and Mass Production Capability via Electrospray Assisted Self-Assembly ▶     Yayang Tian, Guan Wu, Xike Tian et al.     We report for the first time a novel erythrocyte-like graphene microsphere (ELGMs) which can be produced with high quality and mass production capability via electrospray assisted …             CORRIGENDUM: Nature of hardness evolution in nanocrystalline NiTi shape memory alloys during solid-state phase transition ▶     Abbas Amini, Chun Cheng                 ERRATUM: Uniform magnetization transfer in chemical exchange saturation transfer magnetic resonance imaging ▶     Jae-Seung Lee, Prodromos Parasoglou, Ding Xia et al.                 Enhancing Electrocatalytic Oxygen Reduction on Nitrogen-Doped Graphene by Active Sites Implantation ▶     Leiyu Feng, Lanqin Yang, Zujing Huang et al.     The shortage of nitrogen active sites and relatively low nitrogen content result in unsatisfying eletrocatalytic activity and durability of nitrogen-doped graphene (NG) for oxygen …             Fluorous Metal-Organic Frameworks with Enhanced Stability and High H2/CO2 Storage Capacities ▶     Da-Shuai Zhang, Ze Chang, Yi-Fan Li et al.     A new class of metal-organic frameworks (MOFs) has been synthesized by ligand-functionalization strategy. Systematic studies of their adsorption properties were performed at low …             Visible-Light-Driven Oxidation of Primary C–H Bonds over CdS with Dual Co-catalysts Graphene and TiO2 ▶     Min-Quan Yang, Yanhui Zhang, Nan Zhang et al.     Selective activation of primary C–H bonds for fine chemicals synthesis is of crucial importance for the sustainable exploitation of available feedstocks. Here, we report a viable …             Linear structural evolution induced tunable photoluminescence in clinopyroxene solid-solution phosphors ▶     Zhiguo Xia, Yuanyuan Zhang, Maxim S. Molokeev et al.     Clinopyroxenes along the Jervisite (NaScSi2O6) – Diopside (CaMgSi2O6) join have been studied, and a solid-solution of the type (Na1−xCax)(Sc1−xMgx)Si2O6 has been identified in the …             Effects of Bio-Au Nanoparticles on Electrochemical Activity of Shewanella oneidensis Wild Type and ΔomcA/mtrC Mutant ▶     Ranran Wu, Li Cui, Lixiang Chen et al.     Both Shewanella oneidensis MR-1 wild type and its mutant ΔomcA/mtrC are capable of transforming AuIII into Au nanoparticles (AuNPs). Cyclic voltammetry reveals a decrease in redox …             ERRATUM: Room temperature rubbing for few-layer two-dimensional thin flakes directly on flexible polymer substrates ▶     Yan Yu, Shenglin Jiang, Wenli Zhou et al.                 Contact stiffness of randomly rough surfaces ▶     Roman Pohrt, Valentin L. Popov     We investigate the contact stiffness of an elastic half-space and a rigid indenter with randomly rough surface having a power spectrum , where q is the wave vector. The range of …             Ternary Composite of Hemin, Gold Nanoparticles and Graphene for Highly Efficient Decomposition of Hydrogen Peroxide ▶     Xincong Lv, Jian Weng     A ternary composite of hemin, gold nanoparticles and graphene is prepared by a two-step process. Firstly, graphene-hemin composite is synthesized through π-π interaction and then …             Braess's Paradox in Epidemic Game: Better Condition Results in Less Payoff ▶     Hai-Feng Zhang, Zimo Yang, Zhi-Xi Wu et al.     Facing the threats of infectious diseases, we take various actions to protect ourselves, but few studies considered an evolving system with competing strategies. In view of that, …             Fermi-edge superfluorescence from a quantum-degenerate electron-hole gas ▶     Ji-Hee Kim, G. Timothy Noe II, Stephen A. McGill et al.     Nonequilibrium can be a source of order. This rather counterintuitive statement has been proven to be true through a variety of fluctuation-driven, self-organization behaviors …             Breathing synchronization in interconnected networks ▶     V. H. P. Louzada, N. A. M. Araújo, J. S. Andrade Jr. et al.     Global synchronization in a complex network of oscillators emerges from the interplay between its topology and the dynamics of the pairwise interactions among its numerous …             Superior Field Emission Properties of Layered WS2-RGO Nanocomposites ▶     Chandra Sekhar Rout, Padmashree D. Joshi, Ranjit V. Kashid et al.     We report here the field emission studies of a layered WS2-RGO composite at the base pressure of ~1 × 10−8 mbar. The turn on field required to draw a field emission current …             Experimental demonstration of surface and bulk plasmon polaritons in hypergratings ▶     Kandammathe Valiyaveedu Sreekanth, Antonio De Luca, Giuseppe Strangi     Hyperbolic metamaterials (HMMs) represent a novel class of fascinating anisotropic plasmonic materials, supporting highly confined bulk plasmon polaritons in addition to the …             High-density Two-Dimensional Small Polaron Gas in a Delta-Doped Mott Insulator ▶     Daniel G. Ouellette, Pouya Moetakef, Tyler A. Cain et al.     Heterointerfaces in complex oxide systems open new arenas in which to test models of strongly correlated material, explore the role of dimensionality in …             Fast targeted gene transfection and optogenetic modification of single neurons using femtosecond laser irradiation ▶     Maciej Antkowiak, Maria Leilani Torres-Mapa, Emily C. Witts et al.     A prevailing problem in neuroscience is the fast and targeted delivery of DNA into selected neurons. The development of an appropriate methodology would enable the transfection of …             Fluorescent silk cocoon creating fluorescent diatom using a “Water glass-fluorophore ferry” ▶     Tejas S. Kusurkar, Ishita Tandon, Niroj Kumar Sethy et al.     Fluorophores are ubiquitous in nature. Naturally occurring fluorophores are exceptionally stable and have high quantum yield. Several natural systems have acquired fluorescent …             DNA Translocation through Hydrophilic Nanopore in Hexagonal Boron Nitride ▶     Zhi Zhou, Ying Hu, Hao Wang et al.     Ultra-thin solid-state nanopore with good wetting property is strongly desired to achieve high spatial resolution for DNA sequencing applications. Atomic thick hexagonal boron …             ERRATUM: Atomic Structures of Silicene Layers Grown on Ag(111): Scanning Tunneling Microscopy and Noncontact Atomic Force Microscopy Observations ▶     Andrea Resta, Thomas Leoni, Clemens Barth et al.                 CORRIGENDUM: Lab on a Biomembrane: Rapid prototyping and manipulation of 2D fluidic lipid bilayer circuits ▶     Alar Ainla, Irep Gözen, Bodil Hakonen et al.                 Two-magnon bound state causes ultrafast thermally induced magnetisation switching ▶     J. Barker, U. Atxitia, T. A. Ostler et al.     There has been much interest recently in the discovery of thermally induced magnetisation switching using femtosecond laser excitation, where a ferrimagnetic system can be …             Advanced understanding of stickiness on superhydrophobic surfaces ▶     Jun Wu, Jun Xia, Wei Lei et al.     This study explores how contact angle hysteresis and titling angle relate with stickiness on superhydrophobic surfaces. The result indicates that contact angle hysteresis could …             Fullerene Embedded Shape Memory Nanolens Array ▶     Sohee Jeon, Jun Young Jang, Jae Ryoun Youn et al.     Securing fragile nanostructures against external impact is indispensable for offering sufficiently long lifetime in service to nanoengineering products, especially when coming in …             CORRIGENDUM: Porous Carbon Nanoparticle Networks with Tunable Absorbability ▶     Wei Dai, Seong Jin Kim, Won-Kyung Seong et al.                 Quantum simulation of thermally-driven phase transition and oxygen K-edge x-ray absorption of high-pressure ice ▶     Dongdong Kang, Jiayu Dai, Huayang Sun et al.     The structure and phase transition of high-pressure ice are of long-standing interest and challenge, and there is still a huge gap between theoretical and experimental …             Implantable fiber-optic interface for parallel multisite long-term optical dynamic brain interrogation in freely moving mice ▶     L. V. Doronina-Amitonova, I. V. Fedotov, O. I. Ivashkina et al.     Seeing the big picture of functional responses within large neural networks in a freely functioning brain is crucial for understanding the cellular mechanisms behind the higher …             The Role of Shape Complementarity in the Protein-Protein Interactions ▶     Ye Li, Xianren Zhang, Dapeng Cao     We use a dissipative particle dynamic simulation to investigate the effects of shape complementarity on the protein-protein interactions. By monitoring different kinds of protein …             Biofuel Cell Based on Microscale Nanostructured Electrodes with Inductive Coupling to Rat Brain Neurons ▶     Viktor Andoralov, Magnus Falk, Dmitry B. Suyatin et al.     Miniature, self-contained biodevices powered by biofuel cells may enable a new generation of implantable, wireless, minimally invasive neural interfaces for neurophysiological in …             The Wiedemann-Franz law in the putative one-dimensional metallic phase of PrBa2Cu4O8 ▶     A. F. Bangura, Xiaofeng Xu, N. Wakeham et al.     The nature of the electronic state of a metal depends strongly on its dimensionality. In a system of isolated conducting chains, the Fermi-liquid (quasiparticle) description …             Conversion of multilayer graphene into continuous ultrathin sp3-bonded carbon films on metal surfaces ▶     Dorj Odkhuu, Dongbin Shin, Rodney S. Ruoff et al.     The conversion of multilayer graphenes into sp3-bonded carbon films on metal surfaces (through hydrogenation or fluorination of the outer surface of the top graphene layer) is …             A unified theory of spin-relaxation due to spin-orbit coupling in metals and semiconductors ▶     Péter Boross, Balázs Dóra, Annamária Kiss et al.     Spintronics is an emerging paradigm with the aim to replace conventional electronics by using electron spins as information carriers. Its utility relies on the magnitude of the …             Integrated sorting, concentration and real time PCR based detection system for sensitive detection of microorganisms ▶     Monalisha Nayak, Deepak Singh, Himanshu Singh et al.     The extremely low limit of detection (LOD) posed by global food and water safety standards necessitates the need to perform a rapid process of integrated detection with high …             Multiple leading edge vortices of unexpected strength in freely flying hawkmoth ▶     L. Christoffer Johansson, Sophia Engel, Almut Kelber et al.     The Leading Edge Vortex (LEV) is a universal mechanism enhancing lift in flying organisms. LEVs, generally illustrated as a single vortex attached to the wing throughout the …             Diverse high-risk B2 and D Escherichia coli clones depicted by Fourier Transform Infrared Spectroscopy ▶     Clara Sousa, Ângela Novais, Ana Magalhães et al.     We aimed to develop a reliable method based on Fourier transform infrared spectroscopy with attenuated total reflectance (FTIR-ATR) to discriminate Escherichia coli clones from …             Influence of spatial configurations on electromagnetic interference shielding of ordered mesoporous carbon/ordered mesoporous silica/silica composites ▶     Jiacheng Wang, Hu Zhou, Jiandong Zhuang et al.     Ordered mesoporous carbons (OMCs), obtained by nanocasting using ordered mesoporous silicas (OMSs) as hard templates, exhibit unique arrangements of ordered regular …             Quantum Limit of Quality Factor in Silicon Micro and Nano Mechanical Resonators ▶     Shirin Ghaffari, Saurabh A. Chandorkar, Shasha Wang et al.     Micromechanical resonators are promising replacements for quartz crystals for timing and frequency references owing to potential for compactness, integrability with CMOS …             Multiplex Particle Focusing via Hydrodynamic Force in Viscoelastic Fluids ▶     Doo Jin Lee, Howard Brenner, Jae Ryoun Youn et al.     We introduce a multiplex particle focusing phenomenon that arises from the hydrodynamic interaction between the viscoelastic force and the Dean drag force in a microfluidic …             Time-reversed wave mixing in nonlinear optics ▶     Yuanlin Zheng, Huaijin Ren, Wenjie Wan et al.     Time-reversal symmetry is important to optics. Optical processes can run in a forward or backward direction through time when such symmetry is preserved. In linear optics, a …             Individual Zn2SnO4-sheathed ZnO heterostructure nanowires for efficient resistive switching memory controlled by interface states ▶     Baochang Cheng, Zhiyong Ouyang, Chuan Chen et al.     Resistive switching (RS) devices are widely believed as a promising candidate for next generation nonvolatile resistance random access memory. Here, Zn2SnO4-sheathed ZnO …             In vivo pH monitoring using boron doped diamond microelectrode and silver needles: Application to stomach disorder diagnosis ▶     Stéphane Fierro, Ryo Seishima, Osamu Nagano et al.     This study presents the in vivo electrochemical monitoring of pH using boron doped diamond (BDD) microelectrode and silver needles for potential application in medical diagnosis. …             Covalent functionalization of graphene by azobenzene with molecular hydrogen bonds for long-term solar thermal storage ▶     Yiyu Feng, Hongpo Liu, Wen Luo et al.     Reduced graphene oxide-azobenzene (RGO-AZO) hybrids were prepared via covalent functionalization for long-term solar thermal storage. Thermal barrier (ΔEa) of cis to tran …             High quality reduced graphene oxide through repairing with multi-layered graphene ball nanostructures ▶     Kyoung Hwan Kim, MinHo Yang, Kyeong Min Cho et al.     We present a simple and up-scalable method to produce highly repaired graphene oxide with a large surface area, by introducing spherical multi-layered graphene balls with empty …             Enhanced Community Structure Detection in Complex Networks with Partial Background Information ▶     Zhong-Yuan Zhang, Kai-Di Sun, Si-Qi Wang     Community structure detection in complex networks is important since it can help better understand the network topology and how the network works. However, there is still not a …             Composite media mixing Bragg and local resonances for highly attenuating and broad bandgaps ▶     Nadège Kaina, Mathias Fink, Geoffroy Lerosey     In this article, we investigate composite media which present both a local resonance and a periodic structure. We numerically and experimentally consider the case of a very …             White light emission from polystyrene under pulsed ultra violet laser irradiation ▶     Eunkyeom Kim, Jihoon Kyhm, Jung Hyuk Kim et al.     This paper reports for the first time the luminescent property of polystyrene (PS), produced by pulsed ultra violet laser irradiation. We have discovered that, in air, …             A molecular pathway for the egress of ammonia produced by nitrogenase ▶     Ian Dance     Nitrogenase converts N2 to NH3, at one face of an Fe-Mo-S cluster (FeMo-co) buried in the protein. Through exploration of cavities in the structures of nitrogenase proteins, a …             Durability Enhancement of Intermetallics Electrocatalysts via N-anchor Effect for Fuel Cells ▶     Xiang Li, Li An, Xin Chen et al.     Insufficient durability and catalytic activity of oxygen reduction reaction (ORR) electrocatalyst are key issues that have to be solved for the practical application of low …             From Boron Cluster to Two-Dimensional Boron Sheet on Cu(111) Surface: Growth Mechanism and Hole Formation ▶     Hongsheng Liu, Junfeng Gao, Jijun Zhao     As attractive analogue of graphene, boron monolayers have been theoretically predicted. However, due to electron deficiency of boron atom, synthesizing boron monolayer is very …             Atomic configurations at InAs partial dislocation cores associated with Z-shape faulted dipoles ▶     Luying Li, Zhaofeng Gan, Martha R. McCartney et al.     The atomic arrangements of two types of InAs dislocation cores associated by a Z-shape faulted dipole are observed directly by aberration-corrected high-angle annular-dark-field …             Structural and Morphological Evolution of Lead Dendrites during Electrochemical Migration ▶     Minghua Sun, Hong-Gang Liao, Kaiyang Niu et al.     The electrochemical deposition and dissolution of lead on gold electrodes immersed in an aqueous solution of lead nitrate were studied in situ using a biasing liquid cell by …             A self-assembled microbonded germanium/silicon heterojunction photodiode for 25 Gb/s high-speed optical interconnects ▶     Chih-Kuo Tseng, Wei-Ting Chen, Ku-Hung Chen et al.     A novel technique using surface tension to locally bond germanium (Ge) on silicon (Si) is presented for fabricating high performance Ge/Si photodiodes. Surface tension is a …             Enhanced trion emission from colloidal quantum dots with photonic crystals by two-photon excitation ▶     Xingsheng Xu     For colloidal quantum dots, the ongoing biggest problem is their fluorescence blinking. Until now, there is no generally accepted model for this fluorescence blinking. Here, …             Robust analysis of synthetic label-free DNA junctions in solution by X-ray scattering and molecular simulation ▶     Kyuhyun Im, Daun Jeong, Jaehyun Hur et al.     Structural analysis of branched DNA molecules (BDM) is important as model systems for DNA junctions and also as building units for DNA assembly. Although there have been efforts …             Au25 Clusters as Electron-Transfer Catalysts Induced the Intramolecular Cascade Reaction of 2-nitrobenzonitrile ▶     Hanbao Chong, Peng Li, Shuxin Wang et al.     Design of atomically precise metal nanocluster catalysts is of great importance in understanding the essence of the catalytic reactions at the atomic level. Here, for the first …             The selective transfer of patterned graphene ▶     Xu-Dong Chen, Zhi-Bo Liu, Wen-Shuai Jiang et al.     We demonstrate a selective microcleaving graphene (MG) transfer technique for the transfer of graphene patterns and graphene devices onto chosen targets using a bilayer-polymer …             Flexible high-repetition-rate ultrafast fiber laser ▶     Dong Mao, Xueming Liu, Zhipei Sun et al.     High-repetition-rate pulses have widespread applications in the fields of fiber communications, frequency comb, and optical sensing. Here, we have demonstrated …             Hierarchically Macro-Mesoporous Pt/γ-Al2O3 Composite Microspheres for Efficient Formaldehyde Oxidation at Room Temperature ▶     Longhui Nie, Aiyun Meng, Jiaguo Yu et al.     Room temperature catalytic oxidation by noble metals is considered to be the most promising strategy for the removal of HCHO, which is one of the major indoor air pollutants. …             Single-neuron criticality optimizes analog dendritic computation ▶     Leonardo L. Gollo, Osame Kinouchi, Mauro Copelli     Active dendritic branchlets enable the propagation of dendritic spikes, whose computational functions remain an open question. Here we propose a concrete function to the active …             Novel characteristics of energy spectrum for 3D Dirac oscillator analyzed via Lorentz covariant deformed algebra ▶     Malika Betrouche, Mustapha Maamache, Jeong Ryeol Choi     We investigate the Lorentz-covariant deformed algebra for Dirac oscillator problem, which is a generalization of Kempf deformed algebra in 3 1 dimension of space-time, where …             Preferential Scattering by Interfacial Charged Defects for Enhanced Thermoelectric Performance in Few-layered n-type Bi2Te3 ▶     Pooja Puneet, Ramakrishna Podila, Mehmet Karakaya et al.     Over the past two decades several nano-structuring methods have helped improve the figure of merit (ZT) in the state-of-the art bulk thermoelectric materials. While these methods …             Formation of Alumina Nanocapsules by High-Energy-Electron Irradiation of Na-dawsonite Nanorods ▶     Xiaochuan Duan, Tongil Kim, Lili Han et al.     We report the synthesis of unique Al2O3 nanocapsules by high-energy-electron irradiation of Na-dawsonite and a formation mechanism different from thermal decomposition which …             Ultrafast biexciton spectroscopy in semiconductor quantum dots: evidence for early emergence of multiple-exciton generation ▶     Younghwan Choi, Sangwan Sim, Seong Chu Lim et al.     Understanding multiple-exciton generation (MEG) in quantum dots (QDs) requires in-depth measurements of transient exciton dynamics. Because MEG typically faces competing ultrafast …             Less strained and more efficient GaN light-emitting diodes with embedded silica hollow nanospheres ▶     Jonghak Kim, Heeje Woo, Kisu Joo et al.     Light-emitting diodes (LEDs) become an attractive alternative to conventional light sources due to high efficiency and long lifetime. However, different material properties …             Integration of TiO2 into the diatom Thalassiosira weissflogii during frustule synthesis ▶     Yvonne Lang, Francisco del Monte, Brian J. Rodriguez et al.     Nature has inspired the design of complex hierarchical structures in the field of material science. Diatoms, unicellular algae with a hallmark intricate siliceous cell wall, have …             In-vivo dark-field and phase-contrast x-ray imaging ▶     M. Bech, A. Tapfer, A. Velroyen et al.     Novel radiography approaches based on the wave nature of x-rays when propagating through matter have a great potential for improved future x-ray diagnostics in the clinics. Here, …             High-power Broadband Organic THz Generator ▶     Jae-Hyeok Jeong, Bong-Joo Kang, Ji-Soo Kim et al.     The high-power broadband terahertz (THz) generator is an essential tool for a wide range of THz applications. Here, we present a novel highly efficient electro-optic quinolinium …             Recoil effects of a motional scatterer on single-photon scattering in one dimension ▶     Qiong Li, D. Z. Xu, C. Y. Cai et al.     The scattering of a single photon with sufficiently high energy can cause a recoil of a motional scatterer. We study its backaction on the photon's coherent transport in one …             Mixed lanthanide oxide nanoparticles as dual imaging agent in biomedicine ▶     Wenlong Xu, Badrul Alam Bony, Cho Rong Kim et al.     There is no doubt that the molecular imaging is an extremely important technique in diagnosing diseases. Dual imaging is emerging as a step forward in molecular imaging technique …             Activated boron nitride as an effective adsorbent for metal ions and organic pollutants ▶     Jie Li, Xing Xiao, Xuewen Xu et al.     Novel activated boron nitride (BN) as an effective adsorbent for pollutants in water and air has been reported in the present work. The activated BN was synthesized by a simple …             Impedance matched thin metamaterials make metals absorbing ▶     N. Mattiucci, M. J. Bloemer, N. Aközbek et al.     Metals are generally considered good reflectors over the entire electromagnetic spectrum up to their plasma frequency. Here we demonstrate an approach to tailor their absorbing …             Deep cognitive imaging systems enable estimation of continental-scale fire incidence from climate data ▶     Ritaban Dutta, Jagannath Aryal, Aruneema Das et al.     Unplanned fire is a major control on the nature of terrestrial ecosystems and causes substantial losses of life and property. Given the substantial influence of climatic …             Energy dissipation and error probability in fault-tolerant binary switching ▶     Mohammad Salehi Fashami, Jayasimha Atulasimha, Supriyo Bandyopadhyay     The potential energy profile of an ideal binary switch is a symmetric double well. Switching between the wells without energy dissipation requires time-modulating the height of …             ERRATUM: Self-organization versus top-down planning in the evolution of a city ▶     Marc Barthelemy, Patricia Bordin, Henri Berestycki et al.                 Optical orbital angular momentum conservation during the transfer process from plasmonic vortex lens to light ▶     Haohai Yu, Huaijin Zhang, Yicheng Wang et al.     We demonstrate the optical orbital angular momentum conservation during the transfer process from subwavelength plasmonic vortex lens (PVLs) to light and the generating process of …             Cheap glass fiber mats as a matrix of gel polymer electrolytes for lithium ion batteries ▶     Yusong Zhu, Faxing Wang, Lili Liu et al.     Lithium ion batteries (LIBs) are going to play more important roles in electric vehicles and smart grids. The safety of the current LIBs of large capacity has been remaining a …             Highly Efficient Oxygen Reduction Electrocatalysts based on Winged Carbon Nanotubes ▶     Yingwen Cheng, Hongbo Zhang, Chakrapani V. Varanasi et al.     Developing electrocatalysts with both high selectivity and efficiency for the oxygen reduction reaction (ORR) is critical for several applications including fuel cells and …             Quasi free-standing silicene in a superlattice with hexagonal boron nitride ▶     T. P. Kaloni, M. Tahir, U. Schwingenschlögl     We study a superlattice of silicene and hexagonal boron nitride by first principles calculations and demonstrate that the interaction between the layers of the superlattice is …             Host-Guest Self-assembly in Block Copolymer Blends ▶     Woon Ik Park, YongJoo Kim, Jae Won Jeong et al.     Ultrafine, uniform nanostructures with excellent functionalities can be formed by self-assembly of block copolymer (BCP) thin films. However, extension of their geometric …             CORRIGENDUM: Nonlinear Growth Kinetics of Breast Cancer Stem Cells: Implications for Cancer Stem Cell Targeted Therapy ▶     Xinfeng Liu, Sara Johnson, Shou Liu et al.                 Efficient Spin Injection into Silicon and the Role of the Schottky Barrier ▶     André Dankert, Ravi S. Dulal, Saroj P. Dash     Implementing spin functionalities in Si, and understanding the fundamental processes of spin injection and detection, are the main challenges in spintronics. Here we demonstrate …             Universal statistics of the knockout tournament ▶     Seung Ki Baek, Il Gu Yi, Hye Jin Park et al.     We study statistics of the knockout tournament, where only the winner of a fixture progresses to the next. We assign a real number called competitiveness to each contestant and …             NMR Spectroscopy for Thin Films by Magnetic Resonance Force Microscopy ▶     Soonho Won, Seung-Bo Saun, Soonchil Lee et al.     Nuclear magnetic resonance (NMR) is a fundamental research tool that is widely used in many fields. Despite its powerful applications, unfortunately the low sensitivity of …             Evaluation of Intrinsic Charge Carrier Transport at Insulator-Semiconductor Interfaces Probed by a Non-Contact Microwave-Based Technique ▶     Yoshihito Honsho, Tomoyo Miyakai, Tsuneaki Sakurai et al.     We have successfully designed the geometry of the microwave cavity and the thin metal electrode, achieving resonance of the microwave cavity with the metal-insulator-semiconductor …             Morphing Surfaces Enable Acoustophoretic Contactless Transport of Ultrahigh-Density Matter in Air ▶     Daniele Foresti, Giorgio Sambatakakis, Simone Bottan et al.     The controlled contactless transport of heavy drops and particles in air is of fundamental interest and has significant application potential. Acoustic forces do not rely on …             Dendrimer-mediated hydrothermal synthesis of ultrathin gold nanowires ▶     Hui Liu, Xiaoming Cao, Jianmao Yang et al.     We report the use of poly(amidoamine) dendrimers as stabilizers to synthesize ultrathin Au nanowires (NWs) with a diameter of 1.3 nm via a hydrothermal approach. The formation of …             Live single cell functional phenotyping in droplet nano-liter reactors ▶     Tania Konry, Alexander Golberg, Martin Yarmush     While single cell heterogeneity is present in all biological systems, most studies cannot address it due to technical limitations. Here we describe a nano-liter droplet …             Real-time monitoring of ozone in air using substrate-integrated hollow waveguide mid-infrared sensors ▶     João Flávio da Silveira Petruci, Paula Regina Fortes, Vjekoslav Kokoric et al.     Ozone is a strong oxidant that is globally used as disinfection agent for many purposes including indoor building air cleaning, during food preparation procedures, and for control …             Tuning inter-dot tunnel coupling of an etched graphene double quantum dot by adjacent metal gates ▶     Da Wei, Hai-Ou Li, Gang Cao et al.     Graphene double quantum dots (DQDs) open to use charge or spin degrees of freedom for storing and manipulating quantum information in this new electronic material. However, …             Plasmonic nanopatch array for optical integrated circuit applications ▶     Shi-Wei Qu, Zai-Ping Nie     Future plasmonic integrated circuits with the capability of extremely high-speed data processing at optical frequencies will be dominated by the efficient optical emission …             Programmable hydrogenation of graphene for novel nanocages ▶     Liuyang Zhang, Xiaowei Zeng, Xianqiao Wang     Folded graphene has exhibited novel electrical and mechanical properties unmatched by pristine graphene, which implies that morphology of graphene adds the dimensionality of …             Spin wave nonreciprocity for logic device applications ▶     Mahdi Jamali, Jae Hyun Kwon, Soo-Man Seo et al.     The utilization of spin waves as eigenmodes of the magnetization dynamics for information processing and communication has been widely explored recently due to its high …             Local decomposition induced by dislocation motions inside tetragonal Al2Cu compound: slip system-dependent dynamics ▶     D. Chen, X. L. Ma     Dislocations in a crystal are usually classified into several independent slip systems. Motion of a partial dislocation in monometallic crystals may remove or create stacking …             Exceeding natural resonance frequency limit of monodisperse Fe3O4 nanoparticles via superparamagnetic relaxation ▶     Ning-Ning Song, Hai-Tao Yang, Hao-Liang Liu et al.     Magnetic nanoparticles have attracted much research interest in the past decades due to their potential applications in microwave devices. Here, we adopted a novel technique to …             Orbit-induced spin squeezing in a spin-orbit coupled Bose-Einstein condensate ▶     Jinling Lian, Lixian Yu, J.-Q. Liang et al.     In recent pioneer experiment, a strong spin-orbit coupling, with equal Rashba and Dresselhaus strengths, has been created in a trapped Bose-Einstein condensate. Moreover, many …             Macroscopic assembled, ultrastrong and H2SO4-resistant fibres of polymer-grafted graphene oxide ▶     Xiaoli Zhao, Zhen Xu, Bingna Zheng et al.     Nacre realizes strength and toughness through hierarchical designs with primary “brick and mortar” structures of alternative arrangement of nanoplatelets and biomacromolecules, …             Minority-spin t2g states and the degree of spin polarization in ferromagnetic metallic La2−2xSr1+2xMn2O7 (x=0.38) ▶     Z. Sun, Q. Wang, J. F. Douglas et al.     A half-metal is a material with conductive electrons of one spin orientation. This type of substance has been extensively searched for due to the fascinating physics as well as …             Importance of non-parabolic band effects in the thermoelectric properties of semiconductors ▶     Xin Chen, David Parker, David J. Singh     We present an analysis of the thermoelectric properties of of n-type GeTe and SnTe in relation to the lead chalcogenides PbTe and PbSe. We find that the singly degenerate …             Quantized Water Transport: Ideal Desalination through Graphyne-4 Membrane ▶     Chongqin Zhu, Hui Li, Xiao Cheng Zeng et al.     Graphyne sheet exhibits promising potential for nanoscale desalination to achieve both high water permeability and salt rejection rate. Extensive molecular dynamics simulations on …             Enhanced transcription and translation in clay hydrogel and implications for early life evolution ▶     Dayong Yang, Songming Peng, Mark R. Hartman et al.     In most contemporary life forms, the confinement of cell membranes provides localized concentration and protection for biomolecules, leading to efficient biochemical reactions. …             A Universal Protein Tag for Delivery of SiRNA-Aptamer Chimeras ▶     Hong Yan Liu, Xiaohu Gao     siRNA-aptamer chimeras have emerged as one of the most promising approaches for targeted delivery of siRNA due to the modularity of their diblock RNA structure, relatively lower …             Surface Hall Effect and Nonlocal Transport in SmB6: Evidence for Surface Conduction ▶     D. J. Kim, S. Thomas, T. Grant et al.     A topological insulator (TI) is an unusual quantum state in which the insulating bulk is topologically distinct from vacuum, resulting in a unique metallic surface that is robust …             Microfluidic Preparation of Polymer-Nucleic Acid Nanocomplexes Improves Nonviral Gene Transfer ▶     Christopher L. Grigsby, Yi-Ping Ho, Chao Lin et al.     As the designs of polymer systems used to deliver nucleic acids continue to evolve, it is becoming increasingly apparent that the basic bulk manufacturing techniques of the past …             Interaction-induced localization of mobile impurities in ultracold systems ▶     Jian Li, Jin An, C. S. Ting     The impurities, introduced intentionally or accidentally into certain materials, can significantly modify their characteristics or reveal their intrinsic physical properties, and …             Polarisation Dynamics of Vector Soliton Molecules in Mode Locked Fibre Laser ▶     Veronika Tsatourian, Sergey V. Sergeyev, Chengbo Mou et al.     Two fundamental laser physics phenomena - dissipative soliton and polarisation of light are recently merged to the concept of vector dissipative soliton (VDS), viz. train of short …             First Biosynthetic pathway of 1-hepten-3-one in Iporangaia pustulosa (Opiliones) ▶     Daniele F. O. Rocha, Felipe C. Wouters, Glauco Machado et al.     Arthropods produce a great variety of natural compounds, many of which have unexplored biosynthesis. Among the armored harvestmen (Arachnida: Opiliones) of the suborder …             The Retraction Penalty: Evidence from the Web of Science ▶     Susan Feng Lu, Ginger Zhe Jin, Brian Uzzi et al.     Scientific articles are retracted at increasing rates, with the highest rates among top journals. Here we show that a single retraction triggers citation losses through an …             Interlayer interactions in graphites ▶     Xiaobin Chen, Fuyang Tian, Clas Persson et al.     Based on ab initio calculations of both the ABC- and AB-stacked graphites, interlayer potentials (i.e., graphene-graphene interaction) are obtained as a function of the interlayer …             Highly mobile and reactive state of hydrogen in metal oxide semiconductors at room temperature ▶     Wan Ping Chen, Ke Feng He, Yu Wang et al.     Hydrogen in metal oxides usually strongly associates with a neighboring oxygen ion through an O-H bond and thus displays a high stability. Here we report a novel state of hydrogen …             Modeling the effect of transient populations on epidemics in Washington DC ▶     Nidhi Parikh, Mina Youssef, Samarth Swarup et al.     Large numbers of transients visit big cities, where they come into contact with many people at crowded areas. However, epidemiological studies have not paid much attention to the …             How to Decrease the Viscosity of Suspension with the Second Fluid and Nanoparticles? ▶     Menghan Xu, Haifeng Liu, Hui Zhao et al.     According to recent research reports, addition of small amounts of a secondary fluid to a suspension could dramatically increase viscosity of suspension. Results of this study …             Anomalous resistance overshoot in the integer quantum Hall effect ▶     E. M. Kendirlik, S. Sirt, S. B. Kalkan et al.     In this work we report on experiments performed on smooth edge-narrow Hall bars. The magneto-transport properties of intermediate mobility two-dimensional electron systems are …             Quantifying the Digital Traces of Hurricane Sandy on Flickr ▶     Tobias Preis, Helen Susannah Moat, Steven R. Bishop et al.     Society’s increasing interactions with technology are creating extensive “digital traces” of our collective human behavior. These new data sources are fuelling the rapid …             Liquid Aluminum: Atomic diffusion and viscosity from ab initio molecular dynamics ▶     Noel Jakse, Alain Pasturel     We present a study of dynamic properties of liquid aluminum using density-functional theory within the local-density (LDA) and generalized gradient (GGA) approximations. We …             Magneto-optical fingerprints of distinct graphene multilayers using the giant infrared Kerr effect ▶     Chase T. Ellis, Andreas V. Stier, Myoung-Hwan Kim et al.     The remarkable electronic properties of graphene strongly depend on the thickness and geometry of graphene stacks. This wide range of electronic tunability is of fundamental …             Hydrogel-Stabilized Droplet Bilayers for High Speed Solution Exchange ▶     Shiv A. Acharya, Alexander Portman, Carl S. Salazar et al.     Many applications utilizing artificial lipid bilayers require the ability to exchange the bilayer's solution environment. However, because of the instability of the bilayer, the …             A strong and stretchable self-healing film with self-activated pressure sensitivity for potential artificial skin applications ▶     Chengyi Hou, Tao Huang, Hongzhi Wang et al.     Artificial skin, which mimics the functions of natural skin, will be very important in the future for robots used by humans in daily life. However, combining skin's pressure …             Bending-induced electromechanical coupling and large piezoelectric response in a micromachined diaphragm ▶     Zhihong Wang, Yingbang Yao, Xianbin Wang et al.     We investigated the dependence of electromechanical coupling and the piezoelectric response of a micromachined Pb(Zr0.52Ti0.48)O3 (PZT) diaphragm on its curvature by observing the …             Full Printable Processed Mesoscopic CH3NH3PbI3/TiO2 Heterojunction Solar Cells with Carbon Counter Electrode ▶     Zhiliang Ku, Yaoguang Rong, Mi Xu et al.     A mesoscopic methylammonium lead iodide (CH3NH3PbI3) perovskite/TiO2 heterojunction solar cell is developed with low-cost carbon counter electrode (CE) and full printable process. …             Multi-photon absorption limits to heralded single photon sources ▶     Chad A. Husko, Alex S. Clark, Matthew J. Collins et al.     Single photons are of paramount importance to future quantum technologies, including quantum communication and computation. Nonlinear photonic devices using parametric processes …             Fault-tolerant almost exact state transmission ▶     Zhao-Ming Wang, Lian-Ao Wu, Michele Modugno et al.     We show that a category of one-dimensional XY-type models may enable high-fidelity quantum state transmissions, regardless of details of coupling configurations. This observation …             Prohibitin is associated with antioxidative protection in hypoxia/reoxygenation-induced renal tubular epithelial cell injury ▶     Tian-Biao Zhou, Yuan-Han Qin, Feng-Ying Lei et al.     Prohibitin is an evolutionary conserved and pleiotropic protein that has been implicated in various cellular functions, including proliferation, tumour suppression, apoptosis, …             Coordination Chemistry in magnesium battery electrolytes: how ligands affect their performance ▶     Yuyan Shao, Tianbiao Liu, Guosheng Li et al.     Magnesium battery is potentially a safe, cost-effective, and high energy density technology for large scale energy storage. However, the development of magnesium battery has been …             Patterned time-orbiting potentials for the confinement and assembly of magnetic dipoles ▶     A. Chen, R. Sooryakumar     We present an all-magnetic scheme for the assembly and study of magnetic dipoles within designed confinement profiles that are activated on micro-patterned permalloy films through …             ERRATUM: H+-type and OH−-type biological protonic semiconductors and complementary devices ▶     Yingxin Deng, Erik Josberger, Jungho Jin et al.                 A molecular-gap device for specific determination of mercury ions ▶     Zheng Guo, Zhong-Gang Liu, Xian-Zhi Yao et al.     Specific determination/monitoring of trace mercury ions (Hg2) in environmental water is of significant importance for drinking safety. Complementarily to conventional inductively …             Magnetically tunable singlet-triplet spin qubit in a four-electron InGaAs coupled quantum dot ▶     K. M. Weiss, J. Miguel-Sanchez, J. M. Elzerman     A pair of self-assembled InGaAs quantum dots filled with two electrons can act as a singlet-triplet spin qubit that is robust against nuclear spin fluctuations as well as charge …             Optical imaging to map blood-brain barrier leakage ▶     Hayder Jaffer, Isaac M. Adjei, Vinod Labhasetwar     Vascular leakage in the brain is a major complication associated with brain injuries and certain pathological conditions due to disruption of the blood-brain barrier (BBB). 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