The latest research from Nature Materials, May 2020

[Nature Materials]( [] Advertisement Free EELS Quantification Webinar Announcing our new webinar series focusing on the analytical tools available in GMS 3.4. The first in the series is, Model-Based EELS Quantification and ELNES Phase Mapping Using Experimentally Measured Cross-Sections and is now available. [Watch the webinar today]( [Gatan EELS]( TABLE OF CONTENTS --------------------------------------------------------------- May 2020 Volume 19, Issue 5 [Current issue]( [Editorial](#_19_5-1) [Comment](#_19_5-2) [News & Views](#_19_5-3) [Review Articles](#_19_5-4) [Letters](#_19_5-5) [Articles](#_19_5-6) [Amendments & Corrections](#_19_5-7) Advertisement Microrobots and Nanorobots for Biotechnology June 2, 2020 | Dresden, Germany Nanotechnology research has had a huge impact upon biomedicine and at the forefront of this area are micro and nano devices that use active/controlled motion. This conference will cover a range of topics from fabrication techniques, methods of locomotion to exploring the current applications being used in vitro and in vivo. [REGISTER TODAY]( [Nature Conference]( [] Editorial [ ] [Challenging paradigms in tumour drug delivery p477]( doi:10.1038/s41563-020-0676-x [] Comment [ ] [Active transcytosis and new opportunities for cancer nanomedicine pp478 - 480]( Subehndu Pandit, Debapriya Dutta & Shuming Nie doi:10.1038/s41563-020-0672-1 [] News & Views [ ] [One compound with two distinct topological states pp481 - 482]( Peng Wei & Jagadeesh S. Moodera doi:10.1038/s41563-020-0628-5 [ ] [Achieving a better heat conductor pp482 - 484]( Ashutosh Giri & Patrick E. Hopkins doi:10.1038/s41563-020-0658-z [ ] [Marriage of topology and magnetism pp484 - 485]( Cui-Zu Chang doi:10.1038/s41563-020-0632-9 [ ] [A nanoparticle’s pathway into tumours pp486 - 487]( Irene de Lázaro & David J. Mooney doi:10.1038/s41563-020-0669-9 [ ] [Spinning up quantum defects in 2D materials pp487 - 489]( M. E. Turiansky, A. Alkauskas & C. G. Van de Walle doi:10.1038/s41563-020-0668-x [ ] [Cosmic superconductivity p490]( Philip Ball doi:10.1038/s41563-020-0671-2 [] Review Articles [ ] [Charge transport in high-mobility conjugated polymers and molecular semiconductors pp491 - 502]( Simone Fratini, Mark Nikolka, Alberto Salleo, Guillaume Schweicher & Henning Sirringhaus doi:10.1038/s41563-020-0647-2 Organic semiconductors are making their way into applications ranging from display technology to flexible electronics and biomedical applications. This Review discusses current understanding of charge carrier transport in these materials and strategies to improve their performance. [] Letters [ ] [Magnetic proximity and nonreciprocal current switching in a monolayer WTe2 helical edge pp503 - 507]( Wenjin Zhao, Zaiyao Fei, Tiancheng Song, Han Kyou Choi, Tauno Palomaki et al. doi:10.1038/s41563-020-0620-0 The coupling between magnetism and topology is studied in a van der Waals heterostructure. [ ] [Quantum de-trapping and transport of heavy defects in tungsten pp508 - 511]( Kazuto Arakawa, Mihai-Cosmin Marinica, Steven Fitzgerald, Laurent Proville, Duc Nguyen-Manh et al. doi:10.1038/s41563-019-0584-0 Quantum-assisted de-trapping in tungsten leads to diffusion rates orders of magnitude higher than naive classical estimates suggest. This phenomenon may be generic to any crystalline material. [ ] [Crystal growth rates in supercooled atomic liquid mixtures pp512 - 516]( Alexander Schottelius, Francesco Mambretti, Anton Kalinin, Björn Beyersdorff, Andre Rothkirch et al. doi:10.1038/s41563-020-0613-z The contribution of non-ideal mixing for the crystallization of supercooled mixtures of argon and krypton is reported, showing that this process is well described by classical crystal growth theories when such thermodynamics is considered. [ ] [Selective nitrogen adsorption via backbonding in a metal–organic framework with exposed vanadium sites pp517 - 521]( David E. Jaramillo, Douglas A. Reed, Henry Z. H. Jiang, Julia Oktawiec, Michael W. Mara et al. doi:10.1038/s41563-019-0597-8 Nitrogenases use transition metals to selectively capture weak π acids such as N2 by employing backbonding interactions. Here, a metal–organic framework with exposed vanadium sites is presented that uses this approach for selective capture of N2 from CH4, with impressive selectivity and capacity. [ ] [Robust axion insulator and Chern insulator phases in a two-dimensional antiferromagnetic topological insulator pp522 - 527]( Chang Liu, Yongchao Wang, Hao Li, Yang Wu, Yaoxin Li et al. doi:10.1038/s41563-019-0573-3 A large longitudinal resistance and zero Hall plateau—hallmarks of an axion insulator—are found in MnBi2Te4. Moreover, a moderate magnetic field drives a quantum phase transition to a Chern insulator phase with zero longitudinal resistance and quantized Hall resistance h/e2. [] Articles [ ] [Bandgap tuning of two-dimensional materials by sphere diameter engineering pp528 - 533]( Mengqi Zeng, Jinxin Liu, Lu Zhou, Rafael G. Mendes, Yongqi Dong et al. doi:10.1038/s41563-020-0622-y The bandgap of 2D molybdenum disulfide can be tuned uniformly, reproducibly and precisely over a large range by using a glass sphere support and changing the diameter of the spheres. [ ] [Revealing multiple classes of stable quantum emitters in hexagonal boron nitride with correlated optical and electron microscopy pp534 - 539]( Fariah Hayee, Leo Yu, Jingyuan Linda Zhang, Christopher J. Ciccarino, Minh Nguyen et al. doi:10.1038/s41563-020-0616-9 Defects in hexagonal boron nitride exhibit room-temperature quantum emission, but their unknown structural origin challenges their technological utility. A combination of optical and electron microscopy helps to distinguish at least four classes of defects and correlate them with local strain. [ ] [Initialization and read-out of intrinsic spin defects in a van der Waals crystal at room temperature pp540 - 545]( Andreas Gottscholl, Mehran Kianinia, Victor Soltamov, Sergei Orlinskii, Georgy Mamin et al. doi:10.1038/s41563-020-0619-6 An ensemble of spins associated with an intrinsic defect of two-dimensional hexagonal boron nitride is shown to be optically addressable, allowing spin polarization of its triplet ground state and providing evidence of spin coherence. [ ] [Quantum dynamics of a single molecule magnet on superconducting Pb(111) pp546 - 551]( Giulia Serrano, Lorenzo Poggini, Matteo Briganti, Andrea Luigi Sorrentino, Giuseppe Cucinotta et al. doi:10.1038/s41563-020-0608-9 A superconducting transition is used to switch a single molecule magnet from a blocked magnetization state to a resonant quantum tunnelling regime [ ] [Molecular understanding of charge storage and charging dynamics in supercapacitors with MOF electrodes and ionic liquid electrolytes pp552 - 558]( Sheng Bi, Harish Banda, Ming Chen, Liang Niu, Mingyu Chen et al. doi:10.1038/s41563-019-0598-7 The electrochemical performance of supercapacitors can be enhanced with porous electrodes. Molecular dynamics simulations can now help to clarify the double-layer structure and capacitive performance of supercapacitors composed of MOF electrodes and ionic liquid electrolytes. [ ] [Enhanced photocatalytic hydrogen evolution from organic semiconductor heterojunction nanoparticles pp559 - 565]( Jan Kosco, Matthew Bidwell, Hyojung Cha, Tyler Martin, Calvyn T. Howells et al. doi:10.1038/s41563-019-0591-1 Photocatalysts formed from a single organic semiconductor can suffer from inefficient charge generation leading to low photocatalytic activities. Incorporating a heterojunction between a donor polymer and non-fullerene acceptor in organic nanoparticles leads to enhanced photocatalytic hydrogen evolution. [ ] [The entry of nanoparticles into solid tumours pp566 - 575]( Shrey Sindhwani, Abdullah Muhammad Syed, Jessica Ngai, Benjamin R. Kingston, Laura Maiorino et al. doi:10.1038/s41563-019-0566-2 The dominant mechanism of nanoparticle entry into solid tumours has now been shown to be an active trans-endothelial pathway rather than the currently established passive transport via inter-endothelial gaps. [] Amendments & Corrections [ ] [Author Correction: Electric and antiferromagnetic chiral textures at multiferroic domain walls p576]( J.-Y. Chauleau, T. Chirac, S. Fusil, V. Garcia, W. Akhtar et al. doi:10.1038/s41563-019-0558-2 [ ] [Publisher Correction: Nanoscale percolation in doped BaZrO3 for high proton mobility p577]( Fabian M. Draber, Christiane Ader, John P. Arnold, Sebastian Eisele, Steffen Grieshammer et al. doi:10.1038/s41563-020-0654-3 Advertisement [Nature Communications Top Articles from 2019]( Browse the most read articles published in Nature Communications in 2019 across life and biological sciences, chemistry and materials sciences, physics and Earth and planetary sciences. [Browse Top 50 Collections >>]( [Nature Communications]( [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](. 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