The latest research from Nature Materials July 2021

[Nature Materials]( [] Advertisement [Tutorials: Learn from the Experts!]( Tutorials are overviews of fundamental principles and techniques within a given field or subfield. They’re particularly useful for students and senior researchers looking to increase their understanding of a field that is new to them. [Read now]( [API]( TABLE OF CONTENTS --------------------------------------------------------------- July 2021 Volume 20, Issue 7 [Current issue]( [Editorial](#_20_7-1) [News & Views](#_20_7-2) [Perspectives](#_20_7-3) [Review Articles](#_20_7-4) [Letters](#_20_7-5) [Articles](#_20_7-6) [Amendments & Corrections](#_20_7-7) Advertisement [npj Flexible Electronics]( Publish your research on all types of materials degradation. [Learn more about our submission process ]( [npj Flexible Electronics]( [] Editorial [ ] [Phases at the interface]( doi:10.1038/s41563-021-01049-5 The area confined between grains in polycrystalline materials can undergo phase transformations under external stimuli, providing prospects for materials design based on grain boundary phase engineering. [] News & Views [ ] [Magic under the microscope]( S. J. Haigh & R. Gorbachev doi:10.1038/s41563-021-01027-x Four-dimensional scanning transmission electron microscopy is demonstrated to be a powerful technique for interrogating local strain of twisted graphene bilayers, revealing a two-regime lattice reconstruction process below the ‘magic’ angle. [ ] [Tuning a bond]( Philip Ball doi:10.1038/s41563-021-01044-w [ ] [Interface migration by phase transformations]( Y. Mishin doi:10.1038/s41563-021-00945-0 Direct experimental observations reveal that grain boundaries in aluminium oxide migrate by a chain of structural phase transformations within the boundary core. [ ] [Remote modulation of neuronal cells in the brain]( Rahul Mushi & Arnd Pralle doi:10.1038/s41563-021-01041-z The combination of multicomponent magnetic nanoparticles and a mechanosensitive ion channel has been shown to achieve fast magnetomechanical stimulation of neurons within the brain. [ ] [Hydrogen freedom linked to perovskite efficiency]( Leeor Kronik & Andrew M. Rappe doi:10.1038/s41563-021-01010-6 First-principles calculations on a prototypical hybrid organic–inorganic perovskite reveal an unexpected role for hydrogen defects in the optoelectronic properties of this material. [] Perspectives [ ] [Flow and extraction of energy and charge carriers in hybrid plasmonic nanostructures]( Suljo Linic, Steven Chavez & Rachel Elias doi:10.1038/s41563-020-00858-4 Recent developments in the emerging field of hybrid plasmonics focusing on fundamental aspects related to nanoscopic flow of energy and excited charge carriers in these multicomponent materials and their potential applications are now discussed. [] Review Articles [ ] [Sensory feedback for limb prostheses in amputees]( Stanisa Raspopovic, Giacomo Valle & Francesco Maria Petrini doi:10.1038/s41563-021-00966-9 This Review highlights the approaches that have been utilized in the implementation of sensory feedback onto prosthetic devices to restore the sensation of touch and proprioception for amputees. [] Letters [ ] [Stripe phases in WSe2/WS2 moiré superlattices]( Chenhao Jin, Zui Tao, Tingxin Li, Yang Xu, Yanhao Tang et al. doi:10.1038/s41563-021-00959-8 Optical anisotropy and electronic compressibility measurements are used to uncover stripe phases, where the rotational symmetry of charge density is spontaneously broken, in a two-dimensional semiconductor moiré superlattice. [ ] [Imaging moiré flat bands in three-dimensional reconstructed WSe2/WS2 superlattices]( Hongyuan Li, Shaowei Li, Mit H. Naik, Jingxu Xie, Xinyu Li et al. doi:10.1038/s41563-021-00923-6 Scanning tunnelling spectroscopy and ab initio simulations reveal buckling reconstruction and in-plane strain redistribution in WSe2/WS2 moiré heterostructures. [] Articles [ ] [Direct imaging of atomistic grain boundary migration]( Jiake Wei, Bin Feng, Ryo Ishikawa, Tatsuya Yokoi, Katsuyuki Matsunaga et al. doi:10.1038/s41563-020-00879-z The atomic process of grain boundary migration has been directly observed by scanning transmission electron microscopy, revealing transformations between different stable or metastable grain boundary structures. [ ] [Strain fields in twisted bilayer graphene]( Nathanael P. Kazmierczak, Madeline Van Winkle, Colin Ophus, Karen C. Bustillo, Stephen Carr et al. doi:10.1038/s41563-021-00973-w Complete strain tensor fields of twisted bilayer graphene are quantitatively mapped, revealing two-regime reconstruction mechanics depending on twist angle. [ ] [Spin-induced linear polarization of photoluminescence in antiferromagnetic van der Waals crystals]( Xingzhi Wang, Jun Cao, Zhengguang Lu, Arielle Cohen, Hikari Kitadai et al. doi:10.1038/s41563-021-00968-7 The polarization of photoluminescence is found to depend on spin orientation in a van der Waals antiferromagnet. [ ] [Minimizing hydrogen vacancies to enable highly efficient hybrid perovskites]( Xie Zhang, Jimmy-Xuan Shen, Mark E. Turiansky & Chris G. Van de Walle doi:10.1038/s41563-021-00986-5 First-principles calculations reveal that hydrogen vacancies induce non-radiative losses in methylammonium lead iodide perovskites synthesized under iodine-poor conditions, whereas they are less detrimental in formamidinium-based hybrid perovskites. [ ] [Two-dimensional overdamped fluctuations of the soft perovskite lattice in CsPbBr3]( T. Lanigan-Atkins, X. He, M. J. Krogstad, D. M. Pajerowski, D. L. Abernathy et al. doi:10.1038/s41563-021-00947-y Neutron and X-ray scattering measurements provide further insight into the anharmonic behaviour of lead halide perovskites, revealing that rotations of PbBr6 octahedra in CsPbBr3 crystals occur in a correlated fashion along two-dimensional planes. [ ] [Electrolyte melt infiltration for scalable manufacturing of inorganic all-solid-state lithium-ion batteries]( Yiran Xiao, Kostiantyn Turcheniuk, Aashray Narla, Ah-Young Song, Xiaolei Ren et al. doi:10.1038/s41563-021-00943-2 All-solid-state lithium-ion batteries provide improved safety but typically suffer from high cost and low volumetric energy density. An electrolyte melt-infiltration approach offering reduced manufacturing costs and improved volumetric energy density in all solid cells is proposed. [ ] [Fictitious phase separation in Li layered oxides driven by electro-autocatalysis]( Jungjin Park, Hongbo Zhao, Stephen Dongmin Kang, Kipil Lim, Chia-Chin Chen et al. doi:10.1038/s41563-021-00936-1 Although layered oxides electrodes in lithium-ion batteries are designed under conditions avoiding phase transitions, phase separation during delithiation has been observed. This apparent phase separation is shown to be a dynamical artefact occurring in a many-particle system driven by autocatalytic electrochemical reactions. [ ] [Microstructural origin of locally enhanced CO2 electroreduction activity on gold]( Ruperto G. Mariano, Minkyung Kang, Oluwasegun J. Wahab, Ian J. McPherson, Joshua A. Rabinowitz et al. doi:10.1038/s41563-021-00958-9 Although bulk defects can influence the performance of electrocatalysts used for energy conversion, their structural origins are still unclear. The effects of bulk defects on CO2 electroreduction and H2 evolution activity on Au electrodes are now elucidated. [ ] [Efficient and low-voltage vertical organic permeable base light-emitting transistors]( Zhongbin Wu, Yuan Liu, Erjuan Guo, Ghader Darbandy, Shu-Jen Wang et al. doi:10.1038/s41563-021-00937-0 Vertical organic light-emitting transistors are realized by using a porous base electrode in the centre of the device, which improves efficiency and reduces operating voltage by regulating charge transport and forming an optical microcavity. [ ] [High-rate nanofluidic energy absorption in porous zeolitic frameworks]( Yueting Sun, Sven M. J. Rogge, Aran Lamaire, Steven Vandenbrande, Jelle Wieme et al. doi:10.1038/s41563-021-00977-6 Porous materials can absorb energy by water infiltration, but studies at industrially relevant high-rate intrusions are rare. Here, high-rate experiments are performed on ZIFs showing high energy storage capacity, while molecular simulations allow design rules to be formulated for absorption materials. [ ] [Mechano-tunable chiral metasurfaces via colloidal assembly]( Patrick T. Probst, Martin Mayer, Vaibhav Gupta, Anja Maria Steiner, Ziwei Zhou et al. doi:10.1038/s41563-021-00991-8 Stacked elastomeric arrays containing plasmonic nanoparticles show efficient chiral responses that can be fully controlled by mechanical compression and stack rotation. These simple layered materials may be useful modulators for photonic applications. [ ] [Non-contact long-range magnetic stimulation of mechanosensitive ion channels in freely moving animals]( Jung-uk Lee, Wookjin Shin, Yongjun Lim, Jungsil Kim, Woon Ryoung Kim et al. doi:10.1038/s41563-020-00896-y A magnetic torque actuator has been developed and is capable of modulation of neurons expressing the mechanosensitive ion channel, Piezo1, resulting in long-distance control of locomotion of mice. [] Amendments & Corrections [ ] [Author Correction: Chern insulators, van Hove singularities and topological flat bands in magic-angle twisted bilayer graphene]( Shuang Wu, Zhenyuan Zhang, K. Watanabe, T. Taniguchi & Eva Y. Andrei doi:10.1038/s41563-021-00997-2 [ ] [Publisher Correction: Mixed matrix formulations with MOF molecular sieving for key energy-intensive separations]( Gongping Liu, Valeriya Chernikova, Yang Liu, Kuang Zhang, Youssef Belmabkhout et al. doi:10.1038/s41563-021-01007-1 [ ] [Author Correction: Colony stimulating factor-1 receptor is a central component of the foreign body response to biomaterial implants in rodents and non-human primates]( Joshua C. Doloff, Omid Veiseh, Arturo J. Vegas, Hok Hei Tam, Shady Farah et al. doi:10.1038/s41563-021-01023-1 [nature events]( 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](. 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