Nature Materials contents: May 2014 Volume 13 Number 5 pp 427-530

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Advertisement Select Si, Ge, Au and more for Advanced FIB Nanofabrication!  Visit Raith and learn more about FIB Nanofabrication and ionLiNE's new Multi-Species Ion Beam Technology. TABLE OF CONTENTS May 2014 Volume 13, Issue 5 Editorial Research Highlights News and Views Reviews Letters Articles Corrigenda Erratum Subscribe   Facebook   RSS   Recommend to library   Twitter   Advertisement They're recruiting scientists just like you! The Naturejobs Career Expo is coming to Boston, Massachusetts on May 20, 2014. Take advantage of this free opportunity to meet employers, attend workshops and further develop your career. Don't wait-register today!     Editorial Top Rethink your gender attitudes   p427 doi:10.1038/nmat3975 Unconscious biases are a roadblock for gender equality in science. Research Highlights Top Bone's bridged layers | Seismic cloaks | Two-dimensional iron | Biogenic agents | Bioresorbable organic electronics News and Views Top Materials for lasers: All-round perovskites   pp429 - 430 Frédéric Laquai doi:10.1038/nmat3953 The demonstration of amplified spontaneous emission from thin films of perovskites could pave the way to solution-processed low-cost lasers that can be easily tuned across the entire visible spectrum. See also: Letter by Xing et al. Oxide heterostructures: Thin spin ice under investigation   pp430 - 431 Oleg Petrenko doi:10.1038/nmat3957 It is now possible to fabricate high-quality thin films of spin ice materials. At higher temperatures, they exhibit the hallmarks of a regular spin ice, but at lower temperatures their physics deviate significantly from the properties observed in the bulk. Material witness: Stellar metallurgy   p431 Philip Ball doi:10.1038/nmat3954 Metallic glasses: Fast track to production   pp432 - 433 Dan B. Miracle doi:10.1038/nmat3958 A high-throughput approach combining combinatorial deposition of materials with parallel blow-forming speeds up the discovery rate of bulk metallic glasses that can be easily formed into complex shapes. See also: Article by Ding et al. Bioinspired ceramics: Turning brittleness into toughness   pp433 - 435 André R. Studart doi:10.1038/nmat3955 Nacre-like bulk ceramics with a unique combination of high toughness, strength and stiffness can be produced from brittle constituents by an ice-templating approach. See also: Article by Bouville et al. Natural materials: Armoured oyster shells   pp435 - 437 Robert O. Ritchie doi:10.1038/nmat3956 The remarkable properties of a bivalve shell that enable it to protect the animal against its predators could inspire the design of new lightweight armour materials. See also: Article by Li & Ortiz Nature Materials JOBS of the week W1 Junior Professorship in the field of “Theory of magnetic materials“ Technische Universitat Darmstadt Postdoc in musselinspired multifunctional hydrogel materials Aarhus University Canada Research Chair Tier II in Magnetic Resonance Spectroscopy and Brain Injury University of Calgary & Alberta Children's Research Institute PhD position in Analysis of Fracture in Porous Ceramic Catalysts by use of X-ray Tomography Technical University of Denmark (DTU) Postdoctoral Fellow, Battery Technology University of Waterloo, Dept. of Chem. Eng. More Science jobs from Nature Materials EVENT More science events from Reviews Top Caloric materials near ferroic phase transitions   pp439 - 450 X. Moya, S. Kar-Narayan and N. D. Mathur doi:10.1038/nmat3951 At present, magneto-, electro- and mechanocaloric effects are intensely investigated as the basis for possible cooling applications. This Review discusses and compares the three effects from both a fundamental and an applied perspective, with an emphasis on the experimental methods used to measure them. Light management for photovoltaics using high-index nanostructures   pp451 - 460 Mark L. Brongersma, Yi Cui and Shanhui Fan doi:10.1038/nmat3921 Strategies to increase light-trapping in solar cells can significantly improve the power-conversion efficiency of these devices. This Review discusses the use of nanostructured high-index layers to manipulate photons in thin-film solar cells, as well as the recent efforts aimed at integrating such layers in large-area devices. Letters Top Thermodynamic evidence for valley-dependent density of states in bulk bismuth   pp461 - 465 R. Küchler, L. Steinke, R. Daou, M. Brando, K. Behnia & F. Steglich doi:10.1038/nmat3909 The electronic properties of bismuth under an applied magnetic field have latterly become a topic of interest. An angle-resolved magnetostriction approach is now used to provide thermodynamic evidence for unusual symmetry-breaking effects. Topological surface state in the Kondo insulator samarium hexaboride   pp466 - 470 D. J. Kim, J. Xia and Z. Fisk doi:10.1038/nmat3913 Samarium hexaboride has recently come under examination as a possible topological insulator. Transport measurements investigating the effects of magnetic impurities on this system uncover characteristics that are consistent with topologically insulating behaviour, and reveal a strongly suppressed bulk conductivity. Optical Fano resonance of an individual semiconductor nanostructure   pp471 - 475 Pengyu Fan, Zongfu Yu, Shanhui Fan and Mark L. Brongersma doi:10.1038/nmat3927 Fano resonances have been studied for many resonant optical systems. To fully understand the origin behind this phenomenon it would be necessary to have simultaneous information about the dissipation of stored energy in the near-field and the scattering response in the far-field. This is now shown to be possible in a single semiconductor nanostripe using photocurrent measurements. Low-temperature solution-processed wavelength-tunable perovskites for lasing   pp476 - 480 Guichuan Xing, Nripan Mathews, Swee Sien Lim, Natalia Yantara, Xinfeng Liu, Dharani Sabba, Michael Grätzel, Subodh Mhaisalkar & Tze Chien Sum doi:10.1038/nmat3911 Hybrid halide perovskites have demonstrated promising performance as solar cells. It is now reported that these solution-processed materials are also suited to lasing applications, because of the high optical gain and stable amplified spontaneous emission they show in the visible spectral range. See also: News and Views by Laquai Articles Top Persistent optically induced magnetism in oxygen-deficient strontium titanate   pp481 - 487 W. D. Rice, P. Ambwani, M. Bombeck, J. D. Thompson, G. Haugstad, C. Leighton & S. A. Crooker doi:10.1038/nmat3914 Strontium titanate is widely studied for the myriad of phenomena that are known to occur in the vicinity of its surface. It is now shown that light can be used to induce magnetism in oxygen-deficient crystals of SrTiO3. Vacancy defects and monopole dynamics in oxygen-deficient pyrochlores   pp488 - 493 G. Sala, M. J. Gutmann, D. Prabhakaran, D. Pomaranski, C. Mitchelitis, J. B. Kycia, D. G. Porter, C. Castelnovo & J. P. Goff doi:10.1038/nmat3924 A number of rare-earth pyrochlore materials are experimental realizations of spin ice, a magnetic state that shares a number of similarities with conventional water ice. Diffuse neutron scattering experiments now show that oxygen vacancies strongly affect the dynamics of monopole excitations in the spin-ice material Y2Ti2O7–δ. Combinatorial development of bulk metallic glasses   pp494 - 500 Shiyan Ding, Yanhui Liu, Yanglin Li, Ze Liu, Sungwoo Sohn, Fred J. Walker & Jan Schroers doi:10.1038/nmat3939 For metallic glasses composed of three or more elements, optimizing their composition to satisfy a combination of properties is a formidable task. Now, a high-throughput strategy that can simultaneously fabricate thousands of alloy compositions and characterize them for thermoplastic formability through parallel blow forming makes possible the identification of the alloy composition with the highest thermoplastic formability. See also: News and Views by Miracle Pervasive nanoscale deformation twinning as a catalyst for efficient energy dissipation in a bioceramic armour   pp501 - 507 Ling Li and Christine Ortiz doi:10.1038/nmat3920 To ensure survival, the exoskeletons of biological species are required to minimize the spatial extent of damage following attack or multi-hit events. Now, nanoindentation experiments on a transparent bivalve shell, which is made up of layered, diamond-shaped calcite crystals, show an increased energy dissipation density compared with single-crystal calcite, resulting in penetration resistance and deformation localization. The detailed mechanisms of this enhanced energy dissipation are revealed and include nanoscale deformation twinning around the penetration zone. See also: News and Views by Ritchie Strong, tough and stiff bioinspired ceramics from brittle constituents   pp508 - 514 Florian Bouville, Eric Maire, Sylvain Meille, Bertrand Van de Moortèle, Adam J. Stevenson & Sylvain Deville doi:10.1038/nmat3915 The toughness of ceramic materials can be improved by introducing a polymeric or metallic ductile phase, yet most often this is at the expense of strength, stiffness and high-temperature stability. Now, a simple processing route based on widespread ceramic processing techniques is shown to produce bulk ceramics that mimic the structure of natural nacre and have a unique combination of high strength, toughness and stiffness, even at high temperatures. See also: News and Views by Studart Synthesis and patterning of tunable multiscale materials with engineered cells   pp515 - 523 Allen Y. Chen, Zhengtao Deng, Amanda N. Billings, Urartu O. S. Seker, Michelle Y. Lu, Robert J. Citorik, Bijan Zakeri & Timothy K. Lu doi:10.1038/nmat3912 Biofilms are multifunctional and environmentally responsive assemblies of living and non-living components. By using synthetic gene networks in engineered cells to regulate the production of extracellular amyloid fibrils, and by interfacing the fibrils with inorganic materials such as metal nanoparticles, stimuli-responsive synthetic biofilms with switchable functions and tunable composition and structure have now been produced. Universal process-inert encoding architecture for polymer microparticles   pp524 - 529 Jiseok Lee, Paul W. Bisso, Rathi L. Srinivas, Jae Jung Kim, Albert J. Swiston & Patrick S. Doyle doi:10.1038/nmat3938 The use of encoded microparticles in industrial settings is hampered by issues of scalability, decoding robustness and encoding density. Now, easily decodable microparticles with spatially patterned rare-earth upconversion nanocrystals, exponentially scalable encoding capacities and ultralow decoding false-alarm rates that are insensitive to harsh processing environments and can be used in practical applications such as durable anti-counterfeiting labels and multiplexed bioassays are reported. Corrigenda Top Corrigendum: Plant nanobionics approach to augment photosynthesis and biochemical sensing   p530 Juan Pablo Giraldo, Markita P. Landry, Sean M. Faltermeier, Thomas P. McNicholas, Nicole M. Iverson, Ardemis A. Boghossian, Nigel F. Reuel, Andrew J. Hilmer, Fatih Sen, Jacqueline A. Brew & Michael S. Strano doi:10.1038/nmat3947 Corrigendum: Galvanotactic control of collective cell migration in epithelial monolayers   p530 Daniel J. Cohen, W. James Nelson and Michel M. Maharbiz doi:10.1038/nmat3948 Erratum Top Erratum: Accelerating charging dynamics in subnanometre pores   p530 Svyatoslav Kondrat, Peng Wu, Rui Qiao and Alexei A. Kornyshev doi:10.1038/nmat3952 Top Advertisement Nature Publishing Index 2013 Asia-Pacific The Nature Publishing Index 2013 Asia-Pacific supplement provides institutional league tables and regional commentary based on articles published by Asia-Pacific researchers between 1 January 2013 and 31 December 2013. How does your institution compare?    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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