Nature Materials contents: October 2015 Volume 14 Number 10 pp 961-1071

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TABLE OF CONTENTS October 2015 Volume 14, Issue 10 Editorial Research Highlights News and Views Progress Article Letters Articles Advertisement   Ready for a glimpse of tomorrow? Visit KAUST Discovery today KAUST Discovery highlights the cutting-edge research, technologies and innovations emerging from the King Abdullah University of Science and Technology.   http://discovery.kaust.edu.sa Subscribe   Facebook   RSS   Recommend to library   Twitter   Advertisement Nature Energy: Call for Papers Launching in January 2016, Nature Energy is now open for submissions and inviting high-quality research from across the natural and social sciences. The journal will be dedicated to exploring all aspects of the on-going discussion of energy provision; from the generation and storage of energy, to its distribution and management, the needs and demands of the different actors, and the impacts that energy technologies and policies have on societies. Submit your next research paper to the journal.     Editorial Top Fair success rates   p961 doi:10.1038/nmat4445 For authors who have published in this journal, success rates of getting manuscripts peer-reviewed and published do not correlate with submission history or academic seniority. Research Highlights Top Superconductivity: Raising the temperature | Glasses: Melting frameworks | Architectured materials: Snapping metamaterials | Implantable devices: A solid base | Quantum plasmonics: Diamonds in waveguides News and Views Top Supramolecular materials: Longer and safer gastric residence   pp963 - 964 Vitaliy V. Khutoryanskiy doi:10.1038/nmat4432 A supramolecular polymer that is stable in the acidic environment of the stomach but dissolves in the neutral-pH environment of the intestines prolongs the safe retention of gastric devices. See also: Article by Zhang et al. Perovskite photovoltaics: Hovering solar cells   pp964 - 966 Michele Sessolo and Henk J. Bolink doi:10.1038/nmat4405 Ultrathin, flexible and lightweight perovskite solar cells with improved stability in air can now power model airplanes for several hours. See also: Article by Kaltenbrunner et al. Intracellular imaging: Resolution power   p966 Pep Pàmies doi:10.1038/nmat4442 Molecular spintronics: A warm exchange   pp967 - 968 Sandrine Heutz doi:10.1038/nmat4431 Molecular layers show antiferromagnetic ordering up to room temperature and are able to exchange bias a ferromagnetic electrode, demonstrating that molecules could be much more than a simple vehicle for transporting spin. See also: Letter by Gruber et al. Material witness: A sense of dislocations   p968 Philip Ball doi:10.1038/nmat4443 Ferroelectrics: The positives of going negative   pp969 - 970 Darrell G. Schlom and Craig J. Fennie doi:10.1038/nmat4391 Negative pressure in ferroelectric nanowires has been achieved by exploiting a phase transformation between crystal structures with differing densities, leading to substantial property enhancement. See also: Letter by Wang et al. Tissue mechanics: Cell jam   pp970 - 971 Melody A. Swartz doi:10.1038/nmat4434 Collective cell migration and jamming in the bronchial epithelium helps to understand the pathophysiology underlying asthma. See also: Article by Park et al. Materials JOBS of the week Cohesion / Adhesion properties of lignocellulosic polymers in native or bioinspired materials UMR FARE INRA/URCA Faculty Position in the Research Area of Energy and the Environment Virginia Tech (VT) Assistant Professor Positions University of Texas Southwestern Medical Center More Science jobs from Materials EVENT NuMat 2016: The Nuclear Materials Conference 07.11.16 Montpellier, France More science events from Progress Article Top Big–deep–smart data in imaging for guiding materials design   pp973 - 980 Sergei V. Kalinin, Bobby G. Sumpter and Richard K. Archibald doi:10.1038/nmat4395 Advanced microscopy techniques provide unique insight into a material's structure. This Progress Article discusses how the application of big, deep and smart data to image analysis might permit the design of materials with advanced functionality. Letters Top Exchange bias and room-temperature magnetic order in molecular layers   pp981 - 984 Manuel Gruber, Fatima Ibrahim, Samy Boukari, Hironari Isshiki, Loïc Joly et al. doi:10.1038/nmat4361 Antiferromagnetic order at room temperature is stabilized in Mn phthalocyanine layers in contact with a cobalt layer. In addition, the molecular layer pins the inorganic ferromagnetic layer through exchange bias at low temperature. See also: News and Views by Heutz Negative-pressure-induced enhancement in a freestanding ferroelectric   pp985 - 990 Jin Wang, Ben Wylie-van Eerd, Tomas Sluka, Cosmin Sandu, Marco Cantoni et al. doi:10.1038/nmat4365 It is shown that a phase change to a denser crystal structure in PbTiO3 nanowires creates a negative-pressure stress state, which is effective in enhancing ferroelectric performance. See also: News and Views by Schlom & Fennie Time-domain separation of optical properties from structural transitions in resonantly bonded materials   pp991 - 995 Lutz Waldecker, Timothy A. Miller, Miquel Rudé, Roman Bertoni, Johann Osmond et al. doi:10.1038/nmat4359 Femtosecond optical spectroscopy and single-shot electron diffraction measurements during the photoinduced amorphization of the phase-change material Ge2Sb2Te5 demonstrate that optical properties can be separated from the structural state. Watch an audio-visual summary of the paper here Eliminating degradation and uncovering ion-trapping dynamics in electrochromic WO3 thin films   pp996 - 1001 Rui-Tao Wen, Claes G. Granqvist and Gunnar A. Niklasson doi:10.1038/nmat4368 Although WO3 thin films are promising as electrodes for electrochromic devices, they suffer from degradation of optical modulation. Ion-trapping-induced degradation can now be successfully eliminated by constant-current-driven de-trapping. Thermoresponsive actuation enabled by permittivity switching in an electrostatically anisotropic hydrogel   pp1002 - 1007 Youn Soo Kim, Mingjie Liu, Yasuhiro Ishida, Yasuo Ebina, Minoru Osada et al. doi:10.1038/nmat4363 The temperature-mediated modulation of anisotropic electrostatics in response to changes of electrostatic permittivity in a hydrogel consisting of cofacially oriented electrolyte nanosheets imparts the hydrogel with actuation properties. Articles Top Pressure-induced superconductivity in the iron-based ladder material BaFe2S3   pp1008 - 1012 Hiroki Takahashi, Akira Sugimoto, Yusuke Nambu, Touru Yamauchi, Yasuyuki Hirata et al. doi:10.1038/nmat4351 Superconductivity below 14 K in the vicinity of a metal–insulator transition at about 11 GPa is shown for the iron-based spin-ladder material BaFe2S3, a Mott insulator with striped-type magnetic ordering below ∼120 K. Ultra-sparse metasurface for high reflection of low-frequency sound based on artificial Mie resonances   pp1013 - 1019 Y. Cheng, C. Zhou, B. G. Yuan, D. J. Wu, Q. Wei et al. doi:10.1038/nmat4393 An ultraslow-fluid-like unit cell composed of acoustic channels, arranged in a zigzag shape, exhibits various tunable Mie resonances. It is used for the construction of a highly reflective metasurface that can efficiently block low-frequency sound. Epitaxial growth of two-dimensional stanene   pp1020 - 1025 Feng-feng Zhu, Wei-jiong Chen, Yong Xu, Chun-lei Gao, Dan-dan Guan et al. doi:10.1038/nmat4384 The growth of stanene on bismuth telluride has been achieved using molecular beam epitaxy. Photoemission spectroscopy and theoretical calculations are used to investigate the effects of the substrate on the electronic properties of the Sn layers. Design principles for solid-state lithium superionic conductors   pp1026 - 1031 Yan Wang, William Davidson Richards, Shyue Ping Ong, Lincoln J. Miara, Jae Chul Kim et al. doi:10.1038/nmat4369 Achieving a Li-ion conductivity in the solid state comparable to existing liquid electrolytes is challenging. A fundamental relationship between anion packing and ionic transport now reveals desirable structural attributes for Li-ion conductors. Flexible high power-per-weight perovskite solar cells with chromium oxide–metal contacts for improved stability in air   pp1032 - 1039 Martin Kaltenbrunner, Getachew Adam, Eric Daniel Glowacki, Michael Drack, Reinhard Schwodiauer et al. doi:10.1038/nmat4388 The use of a chromium oxide interlayer separating the perovskite film from the metal contacts improves the stability of perovskite solar cells in air. Deposited on thin plastic foils, these ultralight devices power model airplanes and dirigibles. See also: News and Views by Sessolo & Bolink Unjamming and cell shape in the asthmatic airway epithelium   pp1040 - 1048 Jin-Ah Park, Jae Hun Kim, Dapeng Bi, Jennifer A. Mitchel, Nader Taheri Qazvini et al. doi:10.1038/nmat4357 Cell shape provides a structural signature for the classification and investigation of the jamming of bronchial epithelial layers in asthma. See also: News and Views by Swartz Fluctuation-driven mechanotransduction regulates mitochondrial-network structure and function   pp1049 - 1057 Erzsébet Bartolák-Suki, Jasmin Imsirovic, Harikrishnan Parameswaran, Tyler J. Wellman, Nuria Martinez et al. doi:10.1038/nmat4358 Vascular smooth muscle cells can harness fluctuations in external cyclic stretching by altering their cytoskeletal organization and the associated mitochondrial network. Phage-mediated counting by the naked eye of miRNA molecules at attomolar concentrations in a Petri dish   pp1058 - 1064 Xin Zhou, Peng Cao, Ye Zhu, Wuguang Lu, Ning Gu et al. doi:10.1038/nmat4377 An ultrasensitive method that uses a genetically engineered bacteriophage to bind miRNA in a one-to-one manner allows the counting, by the naked eye, of miRNA molecules at attomolar concentrations on Petri dishes. A pH-responsive supramolecular polymer gel as an enteric elastomer for use in gastric devices   pp1065 - 1071 Shiyi Zhang, Andrew M. Bellinger, Dean L. Glettig, Ross Barman, Young-Ah Lucy Lee et al. doi:10.1038/nmat4355 A supramolecular elastic polymer that is stable in the acidic environment of the stomach but dissolves in the neutral-pH environment of the intestines is shown to function as a safe gastric-retentive device in pigs. See also: News and Views by Khutoryanskiy Top Advertisement Announcing Nature Reviews Materials Launching in January 2016, Nature Reviews Materials aims to cover the making, measuring, modelling and manufacturing of materials - thus, looking at materials science throughout the pipeline of laboratory discovery to functional device. Nature Reviews Materials will provide timely and authoritative Reviews and Perspectives, written by leading researchers in their fields.  Visit for further details.      Natureevents is a fully searchable, multi-disciplinary database designed to maximise exposure for events organisers. The contents of the Natureevents Directory are now live. The digital version is available here. Find the latest scientific conferences, courses, meetings and symposia on natureevents.com. For event advertising opportunities across the Nature Publishing Group portfolio please contact natureevents@nature.com More Nature Events

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