Nature Materials contents: August 2015 Volume 14 Number 8 pp 745-847

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TABLE OF CONTENTS August 2015 Volume 14, Issue 8 Editorial Commentary Research Highlights News and Views Review Letters Articles Subscribe   Facebook   RSS   Recommend to library   Twitter   Advertisement Microsystems & Nanoengineering, the first engineering journal of Nature Publishing Group, is coming to Nature Publishing group in summer. The journal is a new online-only, open access, fully peer-reviewed journal which will publish original research articles and reviews in the latest aspects of Micro and Nano Electro Mechanical Systems (MEMS/NEMS) and nanoengineering relevant to MEMS/NEMS. Learn more!   Editorial Top Mighty linkers   p745 doi:10.1038/nmat4385 The versatility of DNA linkers as selective binders is accelerating the rational design of the assembly of nanoparticle crystals with unprecedented structural complexity. Commentary Top DNA-linked superlattices get into shape   pp746 - 749 Bert Nickel and Tim Liedl doi:10.1038/nmat4376 Advances in the control of the shape, bonding direction and valency of DNA-coated nanoparticles allow the synthesis of nanoparticle crystallites of ever increasing complexity. Research Highlights Top Spintronics: Detecting the switch | Intracellular chemistry: Bioorthogonal catalysts | Biomechanics: Square strength | Colloidal nanocrystals: Precursors take control | Mechanical instabilities: Firmer free-energy News and Views Top DNA–nanoparticle crystals: Flip-flop lattices   pp751 - 752 Erika Eiser doi:10.1038/nmat4370 The structure of crystals made of DNA-bridged nanoparticles can be selectively switched between various lattices by reprogramming the DNA-mediated interactions between the nanoparticles. See also: Article by Zhang et al. DNA–nanoparticle crystals: Exploiting shape complementarity   pp752 - 754 Jean-Philippe Sobczak and Hendrik Dietz doi:10.1038/nmat4372 Improved control over the shape of nanoparticles and the interactions between them allows the rational construction of intricate microscale assemblies. See also: Article by O'Brien et al. Material witness: Liquid-state particle physics   p754 Philip Ball doi:10.1038/nmat4373 Superconductivity: The FeSe riddle   pp755 - 756 I. I. Mazin doi:10.1038/nmat4371 Electron–phonon coupling has been considered as a possible mechanism behind the high superconducting critical temperature of FeSe monolayers. The doping dependence of the superconductivity casts serious doubt that it plays a decisive role. See also: Letter by Miyata et al. Dislocation networks: Shedding coherent light on defects   pp756 - 757 Felix Hofmann doi:10.1038/nmat4334 With Bragg coherent diffractive imaging it is now possible to image the evolution of the entire dislocation network within a microcrystal during growth and dissolution. See also: Letter by Clark et al. Vapour–liquid–solid growth: Nanowire–quantum dot epitaxy   pp757 - 759 Peter Krogstrup doi:10.1038/nmat4353 The synthesis of crystalline quantum dots epitaxially incorporated into silicon nanowires holds promise for future device applications in various areas of opto- and quantum electronics. See also: Article by Panciera et al. Photonics: Trapped in a flat dispersion   p759 Maria Maragkou doi:10.1038/nmat4378 Shape memory alloys: Towards practical actuators   pp760 - 761 David Dye doi:10.1038/nmat4362 Shape memory alloys have been developed that are free of functional fatigue, a key step in obtaining versatile actuators. Materials JOBS of the week PhD student: Synthesis and characterization of organic-inorganic hybrid materials and nanostructures Swedish University of Agricultural Sciences (SLU) Assistant Researcher – Magnetic Particle Imaging University of California, Berkeley More Science jobs from Materials EVENT NuMat 2016: The Nuclear Materials Conference 07.11.16 Montpellier, France More science events from Review Top Molecular-based design and emerging applications of nanoporous carbon spheres   pp763 - 774 Jian Liu, Nilantha P. Wickramaratne, Shi Zhang Qiao and Mietek Jaroniec doi:10.1038/nmat4317 Major strategies for the preparation and rational design of nanoporous carbon spheres as well as the investigation of their properties for energy conversion and storage, catalysis and biomedical applications are now critically reviewed. Letters Top High-temperature superconductivity in potassium-coated multilayer FeSe thin films   pp775 - 779 Y. Miyata, K. Nakayama, K. Sugawara, T. Sato and T. Takahashi doi:10.1038/nmat4302 The evolution of the superconductivity as a function of film thickness and doping is systematically studied in FeSe films. A high-temperature superconducting phase is found to arise in multilayer films. See also: News and Views by Mazin Three-dimensional imaging of dislocation propagation during crystal growth and dissolution   pp780 - 784 Jesse N. Clark, Johannes Ihli, Anna S. Schenk, Yi-Yeoun Kim, Alexander N. Kulak et al. doi:10.1038/nmat4320 It is demonstrated that Bragg coherent diffraction imaging can be used to visualize dislocation propagation in three dimensions during the repeated growth and dissolution of calcite crystals. See also: News and Views by Hofmann A kirigami approach to engineering elasticity in nanocomposites through patterned defects   pp785 - 789 Terry C. Shyu, Pablo F. Damasceno, Paul M. Dodd, Aaron Lamoureux, Lizhi Xu et al. doi:10.1038/nmat4327 Networks of notches in nanocomposite sheets prevent unpredictable local failure and increase the ultimate strain of the sheets from 4% to 370% without affecting their electrical conductance. Dynamic polymer systems with self-regulated secretion for the control of surface properties and material healing   pp790 - 795 Jiaxi Cui, Daniel Daniel, Alison Grinthal, Kaixiang Lin and Joanna Aizenberg doi:10.1038/nmat4325 Dynamic liquid exchanges in a supramolecular polymer-gel matrix with liquid-storage compartments and a thin liquid layer on top lead to self-healing properties and controllable secretion kinetics. Articles Top Symmetry of charge order in cuprates   pp796 - 800 R. Comin, R. Sutarto, F. He, E. H. da Silva Neto, L. Chauviere et al. doi:10.1038/nmat4295 Charge-modulated states are investigated through resonant X-ray scattering in two cuprate families. This work provides insights on the origin and the microscopic description of charge order, and on its interplay with superconductivity. Extreme mobility enhancement of two-dimensional electron gases at oxide interfaces by charge-transfer-induced modulation doping   pp801 - 806 Y. Z. Chen, F. Trier, T. Wijnands, R. J. Green, N. Gauquelin et al. doi:10.1038/nmat4303 The insertion of La1-xSrxMnO3 in the interface between LaAlO3 and SrTiO3 enhances the electron mobility due to charge-transfer-induced modulation doping. Shubnikov–de Haas oscillations and fingerprints of the quantum Hall effect are observed. Backward phase-matching for nonlinear optical generation in negative-index materials   pp807 - 811 Shoufeng Lan, Lei Kang, David T. Schoen, Sean P. Rodrigues, Yonghao Cui et al. doi:10.1038/nmat4324 Phase matching in the backward direction—the so-called nonlinear mirror effect—is demonstrated experimentally between the fundamental and second harmonic, using two distinct modes in a metal–dielectric–metal waveguide. In situ NMR and electrochemical quartz crystal microbalance techniques reveal the structure of the electrical double layer in supercapacitors   pp812 - 819 John M. Griffin, Alexander C. Forse, Wan-Yu Tsai, Pierre-Louis Taberna, Patrice Simon et al. doi:10.1038/nmat4318 Observing ionic species at the electrode/electrolyte interface in supercapacitor devices is difficult. In situ NMR is now used to directly quantify anionic and cationic species within a working microporous carbon supercapacitor electrode. Synthesis of nanostructures in nanowires using sequential catalyst reactions   pp820 - 825 F. Panciera, Y.-C. Chou, M. C. Reuter, D. Zakharov, E. A. Stach et al. doi:10.1038/nmat4352 The addition of nickel and other metal atoms in the liquid droplets that drive the vapour–liquid–solid growth of silicon nanowires leads to the formation of metal silicide nanocrystals that are epitaxially incorporated inside the nanowires. See also: News and Views by Krogstrup Photooxidation and quantum confinement effects in exfoliated black phosphorus   pp826 - 832 Alexandre Favron, Etienne Gaufrès, Frédéric Fossard, Anne-Laurence Phaneuf-L'Heureux, Nathalie Y-W. Tang et al. doi:10.1038/nmat4299 The degradation of exfoliated black phosphorus in ambient conditions may limit its use in electronic devices. The combined effects of light irradiation and exposure to oxygen on mono- and multilayers of this material are now investigated. Anisotropic nanoparticle complementarity in DNA-mediated co-crystallization   pp833 - 839 Matthew N. O'Brien, Matthew R. Jones, Byeongdu Lee and Chad A. Mirkin doi:10.1038/nmat4293 The structural properties of the DNA-mediated assembly of co-crystals of anisotropic nanoparticles can be controlled through the shape and size complementarity of the DNA-coated nanoparticles. See also: News and Views by Sobczak & Dietz Selective transformations between nanoparticle superlattices via the reprogramming of DNA-mediated interactions   pp840 - 847 Yugang Zhang, Suchetan Pal, Babji Srinivasan, Thi Vo, Sanat Kumar et al. doi:10.1038/nmat4296 The selective transformation of a DNA–nanoparticle superlattice into three-dimensional 'daughter' lattices is achieved by modifying interparticle interactions via reprogramming DNA strands. See also: News and Views by Eiser Top Natureevents is a fully searchable, multi-disciplinary database designed to maximise exposure for events organisers. 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