Nature Materials contents: April 2017 Volume 16 Number 4 pp 391 - 497

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TABLE OF CONTENTS April 2017 Volume 16, Issue 4 Editorial News and Views Review Letters Articles Addendum Advertisement   Are we on the verge of a tipping point? Professor Carlos Duarte is widely recognized as one of the world?s leading voices on the impacts of climate change on marine ecosystems. Discover why Professor Duarte believes we are on the verge of an ethical and sustainable agricultural revolution. discovery.kaust.edu.sa/en Subscribe   Facebook   RSS   Recommend to library   Twitter   Advertisement The future of energy research is in the hands of bright and creative minds looking at challenges in new ways. Your experience, talent, and energy will make meaningful contributions to world-scale operations and projects. We are seeking an experienced Materials Synthesis Scientist to join our Drilling Technology Research team. Apply now   Advertisement ELECTRON MICROSCOPY FOR MATERIALS - THE NEXT TEN YEARS Presented by: Zhejiang University | Nature | Nature Materials The conference will feature sessions on nanomaterials, functional materials, structural material, soft matter and biomaterials, and techniques development. May 27-29, 2016 | Zhejiang, China  Register now!   Editorial Top The quantum game   p391 doi:10.1038/nmat4892 With the launch of the Quantum Technologies Flagship, the European Union is looking to become a major player in the upcoming quantum revolution, reaping benefits both for technology development and wealth creation for the European society. News and Views Top Chiral ferromagnetic fluids: Let's twist again   pp392 - 393 Paul Sutcliffe doi:10.1038/nmat4883 The magnetization in a chiral ferromagnetic fluid can be twisted and linked to form a stable three-dimensional topological soliton known as a hopfion. See also: Article by Ackerman & Smalyukh Material witness: Gene memories   p393 Philip Ball doi:10.1038/nmat4887 Biomedical engineering: In vitro amniogenesis   pp394 - 395 Martin Pera doi:10.1038/nmat4885 Using a biomimetic culture platform to replicate the early biophysical environment of a developing embryo, human pluripotent stem cells can be directed towards amnion formation in vitro. See also: Letter by Shao et al. Organic electronics: Battery-like artificial synapses   pp396 - 397 J. Joshua Yang and Qiangfei Xia doi:10.1038/nmat4870 Borrowing the operating principles of a battery, a three-terminal organic switch has been developed on a flexible plastic substrate. The device consumes very little power and can be used as an artificial synapse for brain-inspired computing. See also: Letter by van de Burgt et al. Spectroscopy: Mapping spins in flatland   pp397 - 398 Igor Aharonovich and Fedor Jelezko doi:10.1038/nmat4881 Nuclear quadrupole resonance spectroscopy is used to map the properties of atomically thin hexagonal boron nitride, with the help of the nitrogen–vacancy colour centres engineered in a diamond layer placed under the 2D material. Quantum optics: A new way to correlate photons   pp398 - 399 Fabrice P. Laussy doi:10.1038/nmat4884 Resonance fluorescence from a semiconductor quantum dot unravels a rich two-photon landscape of correlations, and may be used to test their quantum nonlocality. Nature Materials JOBS of the week Postdoctoral Researcher - Time-Resolved Optical Spectroscopy of Photovoltaic Materials and Devices National Renewable Energy Laboratory (NREL) Materials Synthesis Scientist Aramco Services Company Assistant Professor Materials Engineering - Applied Electrochemistry University of British Columbia (UBC) Postdoctoral position in “Low-Temperature Device Studies of 2D Topological Materials” The University of Texas – Austin, Microelectronics Research Center Postdocs in (1) Perovskite Solar Cell (Coating Technology), or (2) Scanning Tunneling Microscopy, or (3) OLED, or (4) Li-Ion Battery OIST Graduate University More Science jobs from Nature Materials EVENT ICIEM 2017 2nd International Conference on Innovative Engineering Materials (ICIEM 2017) 21.10.17 Philadelphia, USA More science events from Review Top Modelling heterogeneous interfaces for solar water splitting   pp401 - 408 Tuan Anh Pham, Yuan Ping and Giulia Galli doi:10.1038/nmat4803 Hydrogen generation from water and sunlight offers a promising way to produce carbon-free energy. Recent progress in predicting properties of heterogeneous interfaces for solar water splitting using first-principles approaches is now reviewed. Letters Top Universal lower limit on vortex creep in superconductors   pp409 - 413 S. Eley, M. Miura, B. Maiorov and L. Civale doi:10.1038/nmat4840 A very slow vortex creep in BaFe2(As0.67P0.33)2 films is found experimentally. The authors also claim the existence of a universal lower limit on vortex creep for any superconductor. A non-volatile organic electrochemical device as a low-voltage artificial synapse for neuromorphic computing   pp414 - 418 Yoeri van de Burgt, Ewout Lubberman, Elliot J. Fuller, Scott T. Keene, Grégorio C. Faria et al. doi:10.1038/nmat4856 A neuromorphic device based on the stable electrochemical fine-tuning of the conductivity of an organic ionic/electronic conductor is realized. These devices show high linearity, low noise and extremely low switching voltage. See also: News and Views by Yang & Xia Self-organized amniogenesis by human pluripotent stem cells in a biomimetic implantation-like niche   pp419 - 425 Yue Shao, Kenichiro Taniguchi, Katherine Gurdziel, Ryan F. Townshend, Xufeng Xue et al. doi:10.1038/nmat4829 The control of biophysical cues during the culture of human pluripotent stem cells on biomaterial substrates can be used to replicate the in vivo amniogenic environment and direct in vitro generation of early human amniotic tissue. See also: News and Views by Pera Advertisement nature.com webcasts Join us for our upcoming webcast followed by live Q&A: NEW INNOVATIONS IN DRUG DELIVERY TECHNOLOGY  Presented by BioPharma Dealmakers Date: Wednesday, March 29, 2017 Time: 8AM PDT | 11AM EDT | 4PM BST | 5PM CEST REGISTER FOR FREE Sponsored by: Corium International | Portal Instruments Inc. | TissueGen Inc. | TrioxNano     Articles Top Static three-dimensional topological solitons in fluid chiral ferromagnets and colloids   pp426 - 432 Paul J. Ackerman and Ivan I. Smalyukh doi:10.1038/nmat4826 Three-dimensional topological solitons are realized in a fluid chiral ferromagnet formed by colloidal dispersions of magnetic nanoplates. See also: News and Views by Sutcliffe Topologically protected bound states in photonic parity–time-symmetric crystals   pp433 - 438 S. Weimann, M. Kremer, Y. Plotnik, Y. Lumer, S. Nolte et al. doi:10.1038/nmat4811 Topologically protected bound states in parity–time-symmetric non-Hermitian photonic lattices are theoretically predicted and experimentally demonstrated. Slip-activated surface creep with room-temperature super-elongation in metallic nanocrystals   pp439 - 445 Li Zhong, Frederic Sansoz, Yang He, Chongmin Wang, Ze Zhang et al. doi:10.1038/nmat4813 In situ atomic-scale imaging of deformation in silver nanocrystals reveals that it is possible to achieve deformability and high strength, attributed to a coupling mechanism between crystal slip and surface diffusional creep. Biredox ionic liquids with solid-like redox density in the liquid state for high-energy supercapacitors   pp446 - 453 Eléonore Mourad, Laura Coustan, Pierre Lannelongue, Dodzi Zigah, Ahmad Mehdi et al. doi:10.1038/nmat4808 Electrochemical storage devices in the liquid state are promising but they suffer from low redox species density. An approach based on biredox ionic liquids now demonstrates bulk-like redox density compatible with supercapacitor applications. Oxygen vacancies enhance pseudocapacitive charge storage properties of MoO3–x   pp454 - 460 Hyung-Seok Kim, John B. Cook, Hao Lin, Jesse S. Ko, Sarah H. Tolbert et al. doi:10.1038/nmat4810 Capacitive energy storage is an attractive alternative to batteries, but electrochemical capacitors are limited by their low energy density. Oxygen vacancies are now shown to enhance the electrochemical properties of MoO3–x. Structure of a model TiO2 photocatalytic interface   pp461 - 466 H. Hussain, G. Tocci, T. Woolcot, X. Torrelles, C. L. Pang et al. doi:10.1038/nmat4793 The interaction of water with TiO2 is crucial for applications such as photocatalytic water splitting. The interfacial structure between water and rutile TiO2 is now shown to consist of an array of hydroxyl molecules with water in the second layer. Temporal mapping of photochemical reactions and molecular excited states with carbon specificity   pp467 - 473 K. Wang, P. Murahari, K. Yokoyama, J. S. Lord, F. L. Pratt et al. doi:10.1038/nmat4816 Laser-excited muon pump–probe spin spectroscopy and analysis of avoided level crossing resonances are used to probe the time evolution of the chemical reactivity of individual carbon atoms in TIPS-pentacene after light excitation. Solution-based electrical doping of semiconducting polymer films over a limited depth   pp474 - 480 Vladimir A. Kolesov, Canek Fuentes-Hernandez, Wen-Fang Chou, Naoya Aizawa, Felipe A. Larrain et al. doi:10.1038/nmat4818 A solution process for the diffusion of dopants in organic semiconducting films over a limited depth has been developed. The method is applied to single polymers and donor–acceptor mixtures, and for the realization of single-layer solar cells. Two-dimensional assemblies from crystallizable homopolymers with charged termini   pp481 - 488 Xiaoming He, Ming-Siao Hsiao, Charlotte E. Boott, Robert L. Harniman, Ali Nazemi et al. doi:10.1038/nmat4837 Uniform, hierarchical 2D nanostructures with controlled shapes can be prepared from homopolymers with charged end-groups using a crystallization-driven assembly process. Designer vaccine nanodiscs for personalized cancer immunotherapy   pp489 - 496 Rui Kuai, Lukasz J. Ochyl, Keith S. Bahjat, Anna Schwendeman and James J. Moon doi:10.1038/nmat4822 High-density lipoprotein nanodiscs loaded with immunostimulatory biomolecules can target draining lymph nodes for cancer vaccination. Advertisement Looking to recruit? Limited time offer from Naturejobs:  Get a 20% discount on our Premium job posting package when you buy before March 31, 2017. Reach a potential audience of 10.8 million users* via nature.com Be seen first by candidates — your position will appear at the top of related searches for 60 days and be displayed prominently on the Naturejobs home page as Job of the Week. Plus appear as 'Featured' in search results Post a job now. * Publisher data 2016     Addendum Top Addendum: Multiscale metallic metamaterials   p497 Xiaoyu Zheng, William Smith, Julie Jackson, Bryan Moran, Huachen Cui et al. doi:10.1038/nmat4882 Top 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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