Nature Materials contents: September 2017 Volume 16 Number 9 pp 875-962

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Advertisement See atoms! Atom Probe Tomography (APT) is the only material analysis technique that offers extensive capabilities for 3D imaging and chemical composition measurements at the atomic scale. Academic institutions use CAMECA's APT for groundbreaking research, and manufacturers rely on APT for process improvement and materials innovation. Learn more at: http://bit.ly/EKBAPT. TABLE OF CONTENTS September 2017 Volume 16, Issue 9 Editorial News and Views Letters Articles Corrigendum   Advertisement   KAUST Discovery: Research into sustainable agriculture Plant Scientist Mark Tester's research into growing crops on poor-quality soils or on otherwise barren land is discovering some ground-breaking findings. Find out more on how Tester's research could one day help feed the world.  Read more here >>   Subscribe   Facebook   RSS   Recommend to library   Twitter   Advertisement Nature Outlook: University Spin-offs  This Outlook presents a portrait of 22 science-based start-up ventures that have emerged from universities around the world to turn laboratory research into practical, profitable products.  Access the Outlook free online for six months.    Advertisement MATERIALS ELECTROCHEMISTRY: FUNDAMENTALS AND APPLICATIONS Presented by: The Southern University of Science and Technology (SUSTech) | Nature Communications | Nature | Nature Nanotechnology | Nature Energy | Nature Materials This conference will feature sessions on Lithium ion batteries next generation energy storage technologies, electrocatalysis and fuel cells, and notes from industry and policy-makers. January 13-15, 2018 | Shenzhen, China REGISTER NOW!   Editorial Top Ticking all the boxes   p875 doi:10.1038/nmat4985 Nature Materials is extending editorial policies regarding transparency of reported data in manuscripts from the physical and life sciences.   News and Views Top Valleytronics: Magnetization without polarization   pp876 - 877 Hongyi Yu and Wang Yao doi:10.1038/nmat4979 A pure electrical generation of magnetization through electrons' valley magnetic moment has been observed in a strained two-dimensional semiconductor.   Carbon nanotubes: Wiry matter–light coupling   pp877 - 878 Jeremy J. Baumberg doi:10.1038/nmat4948 Electrical injection into polaritons, built from admixing excitons in carbon nanotubes with light in a surrounding microcavity, has been achieved.   Raman spectroscopy: Enhanced by organic surfaces   pp878 - 880 John R. Lombardi doi:10.1038/nmat4958 Nanostructured films of organic semiconductors are now shown to enhance the Raman signal of probe molecules, paving the way to the realization of substrates for Raman spectroscopy with molecular selectivity. See also: Article by Yilmaz et al. Microporous polymers: Ultrapermeable membranes   pp880 - 881 Yan Yin and Michael D. Guiver doi:10.1038/nmat4961 Microporous membranes were designed from the loose packing of two-dimensional polymer chains — a breakthrough giving both ultrahigh permeability and good selectivity for gas separations. See also: Article by Rose et al. Integrin binding: Sticking around vessels   pp881 - 883 Michael R. Blatchley and Sharon Gerecht doi:10.1038/nmat4977 A study demonstrates that controlled integrin binding on a biomaterial was capable of promoting vascular cell sprouting and formation of a non-leaky blood vessel network in a healthy and diseased state. See also: Article by Li et al. Nanocrystal superlattices: No need to wait   pp883 - 884 Kun Liu and Eugenia Kumacheva doi:10.1038/nmat4980 In contrast with protocols reporting self-assembly of nanocrystals after synthesis, Pd nanocrystals rapidly form 3D micrometre-size superlattices during growth. The nanocrystals keep growing after assembly, tuning the size of the lattice.   Material witness: A symphony of materials   p885 Philip Ball doi:10.1038/nmat4978   Nature Materials JOBS of the week Recruitment of Professors and Associate Professors School of Materials Science and Engineering, Sun Yat-sen University Sun Yat-sen University Interdisciplinary postdoctoral position in gas sensor development KU Leuven Postdoctoral Researcher (NUS - Physics) National University of Singapore (NUS) Associate Laboratory Director, Physical Sciences Directorate Oak Ridge National Laboratory (ORNL) Postdoctoral Fellows Program in Biomedical Engineering, Shanghai Jiao Tong University Shanghai Jiao Tong University More Science jobs from Nature Materials EVENT Particle-Based Materials Symposium 09.11.17 Saarbrücken, Germany More science events from Letters Top Valley magnetoelectricity in single-layer MoS2   pp887 - 891 Jieun Lee, Zefang Wang, Hongchao Xie, Kin Fai Mak and Jie Shan doi:10.1038/nmat4931 Valley magnetization in single-layer MoS2 is demonstrated by breaking the three-fold rotational symmetry via uniaxial stress. The results are consistent with a theoretical model of valley magnetoelectricity driven by Berry curvature effects. See also: News and Views by Yu & Yao Modulation of thermal and thermoelectric transport in individual carbon nanotubes by fullerene encapsulation   pp892 - 897 Takashi Kodama, Masato Ohnishi, Woosung Park, Takuma Shiga, Joonsuk Park et al. doi:10.1038/nmat4946 Encapsulation of single- and double-wall carbon nanotubes in carbon nanocages, which may contain gadolinium or erbium, leads to a reduction of the thermal conductivity and an improved Seebeck coefficient.   Advertisement Nature Reviews Materials is an online-only, materials science journal that provides an accurate and balanced discussion on a chosen topic, together with an authoritative voice from experienced researchers. Spanning physics, chemistry, biology and engineering, the journal publishes a broad range of Reviews and Comments from world-leading scientists. EXPLORE THE JOURNAL NOW   Articles Top Tunable room-temperature magnetic skyrmions in Ir/Fe/Co/Pt multilayers   pp898 - 904 Anjan Soumyanarayanan, M. Raju, A. L. Gonzalez Oyarce, Anthony K. C. Tan, Mi-Young Im et al. doi:10.1038/nmat4934 A multilayer system based on Ir/Fe/Co/Pt repetitions is found to host magnetic skyrmions at room temperature, while allowing control of the skyrmions' properties such as size and density.   A magnetic topological semimetal Sr1–yMn1–zSb2 (y, z < 0.1)   pp905 - 910 J. Y. Liu, J. Hu, Q. Zhang, D. Graf, H. B. Cao et al. doi:10.1038/nmat4953 Sr1–yMn1–zSb2 (y, z < 0.1) is reported to be a magnetic topological semimetal exhibiting nearly massless relativistic fermions.   Electrical pumping and tuning of exciton-polaritons in carbon nanotube microcavities   pp911 - 917 Arko Graf, Martin Held, Yuriy Zakharko, Laura Tropf, Malte C. Gather et al. doi:10.1038/nmat4940 The exciton-polaritons formed using carbon nanotube field-effect transistors strongly coupled to an optical microcavity can sustain electrical pumping under high current densities. See also: News and Views by Baumberg Nanostructured organic semiconductor films for molecular detection with surface-enhanced Raman spectroscopy   pp918 - 924 Mehmet Yilmaz, Esra Babur, Mehmet Ozdemir, Rebecca L. Gieseking, Yavuz Dede et al. doi:10.1038/nmat4957 Highly nanostructured purely organic films are shown to enhance the Raman signal of methylene blue molecules by three orders of magnitude, due to the unique molecular geometry, morphology and electronic properties of the films. See also: News and Views by Lombardi Dynamic surface self-reconstruction is the key of highly active perovskite nano-electrocatalysts for water splitting   pp925 - 931 Emiliana Fabbri, Maarten Nachtegaal, Tobias Binninger, Xi Cheng, Bae-Jung Kim et al. doi:10.1038/nmat4938 The development of robust and active anode materials for oxygen evolution reaction is challenging. Perovskite nanocatalysts with high mass activity towards water splitting and electronic structures changing drastically during operando conditions are reported.   Polymer ultrapermeability from the inefficient packing of 2D chains   pp932 - 937 Ian Rose, C. Grazia Bezzu, Mariolino Carta, Bibiana Comesaña-Gándara, Elsa Lasseuguette et al. doi:10.1038/nmat4939 Polymer membranes were formed from the inefficient packing of 2D polymer chains in a 3D amorphous solid, forming small and large micropores that enable high gas selectivity and permeability. This strategy may be applied to other polymers. See also: News and Views by Yin & Guiver The processing and heterostructuring of silk with light   pp938 - 945 Mehra S. Sidhu, Bhupesh Kumar and Kamal P. Singh doi:10.1038/nmat4942 Femtosecond laser pulses can induce local bulging or plasma ablation of silk with limited structural damage, thus offering a technique for cutting, patterning, bending and welding of silk with various other materials.   Revealing crystalline domains in a mollusc shell single-crystalline prism   pp946 - 952 F. Mastropietro, P. Godard, M. Burghammer, C. Chevallard, J. Daillant et al. doi:10.1038/nmat4937 3D X-ray Bragg ptychography microscopy, here with a resolution of tens of nanometres, is used to shed light on the relative orientations and strains of crystalline domains in a prism from a pearl oyster shell.   Hydrogels with precisely controlled integrin activation dictate vascular patterning and permeability   pp953 - 961 Shuoran Li, Lina R. Nih, Haylee Bachman, Peng Fei, Yilei Li et al. doi:10.1038/nmat4954 Ligand–integrin binding is essential for cell and tissue growth. Here, controlled integrin binding on a hyaluronic acid hydrogel was shown to promote endothelial cell sprouting in vitro and vessel network formation in vivo. See also: News and Views by Blatchley & Gerecht Advertisement Nature Reviews Chemistry is an online-only journal that provides both an introduction to chemists embarking on a new topic of investigation and thought-provoking, in-depth sections for the expert. The journal also publishes regular columns which focus on the teaching of chemistry and on the translation of research into business opportunities. EXPLORE THE JOURNAL NOW   Corrigendum Top Corrigendum: Carrier generation and electronic properties of a single-component pure organic metal   p962 Yuka Kobayashi, Takeshi Terauchi, Satoshi Sumi and Yoshitaka Matsushita doi:10.1038/nmat4981   Top Advertisement npj Flexible Electronics is a new open access journal that is now open for submissions. The journal publishes the latest high-quality breakthrough research and developments in all aspects related to interdisciplinary flexible electronics topics.  Sign up for article e-alerts >>    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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