Nature Nanotechnology Contents July 2018 Volume 13 Number 7 pp525-618

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TABLE OF CONTENTS July 2018 Volume 13, Issue 7 Editorial Thesis Q&A Research Highlights News & Views Perspectives Letters Articles Amendments & Corrections   Advertisement Innovations In: The Biggest Questions in Science    Read our new special report on the nature of spacetime, the origin of life, the source of consciousness, and other fundamental questions in science.   Access free online   Produced with support from: The Kavli Prize    Advertisement nature.com webcasts Nature Research Custom Media presents a webcast on: Optical Trapping of Ion Coulomb Crystals Date: Tuesday, July 31, 2018 Join our webcast to understand the trapping of neutral and charged atoms and how to exploit optically trapped ions to investigate quantum-phase transitions. This webcast has been produced on behalf of the sponsor who retains sole responsibility for content Register for FREE  Sponsored by: Andor      Editorial   Factors that make an impact    p525 doi:10.1038/s41565-018-0215-y Thesis   Listening    pp526 - 527 Chris Toumey doi:10.1038/s41565-018-0199-7 Advertisement Do you have a career question?  The Naturejobs podcast features one-on-one Q&As, panel discussions and other exclusive content to help scientists with their careers. Hosted on the Naturejobs blog, the podcast is also available on iTunes and Soundcloud. Listen today!   Q&A   From an idea to a technology    pp528 - 530 Alberto Moscatelli doi:10.1038/s41565-018-0206-z Advertisement Communications Physics: Open for Submissions Communications Physics is a new open access journal that publishes high-quality primary research articles, reviews and commentary representing significant advances and new insights to the field of physics. The journal is now open for submissions. Find out more >>>   Research Highlights   Longer wires conduct better    p531 Benjamin Heinrich doi:10.1038/s41565-018-0211-2 Setting up boundaries    p531 Chiara Pastore doi:10.1038/s41565-018-0212-1 Plastic not so fantastic    p531 Fabio Pulizzi doi:10.1038/s41565-018-0213-0 Low-dimensional perovskites    p531 Olga Bubnova doi:10.1038/s41565-018-0214-z Nature Nanotechnology JOBS of the week Faculty position Sabanci University More Science jobs from Nature Nanotechnology EVENT NanoTox 2018 - 9th International Conference on Nanotoxicology 18.09.18 Neuss, Germany More science events from News & Views   Electric switching of magnetism in 2D    p532 Kenneth S. Burch doi:10.1038/s41565-018-0165-4 Strong bundles based on carbon nanotubes    pp533 - 534 Rodney S. Ruoff doi:10.1038/s41565-018-0184-1 Taking upconversion to lase in microcavity    pp534 - 536 Gungun Lin & Dayong Jin doi:10.1038/s41565-018-0191-2 Getting to the brain    p536 Maria Giuseppina Baratta doi:10.1038/s41565-018-0182-3 Perspectives   Advanced tools for the safety assessment of nanomaterials    pp537 - 543 Bengt Fadeel, Lucian Farcal, Barry Hardy, Socorro Vázquez-Campos, Danail Hristozov et al. doi:10.1038/s41565-018-0185-0 New tools and approaches in hazard and risk assessment of engineered nanomaterials may pave the way to safe nanomaterial-driven innovations.   Letters   Electrical control of 2D magnetism in bilayer CrI3    pp544 - 548 Bevin Huang, Genevieve Clark, Dahlia R. Klein, David MacNeill, Efrén Navarro-Moratalla et al. doi:10.1038/s41565-018-0121-3 Electrical control of magnetism in a bilayer of CrI3 enables the realization of an electrically driven magnetic phase transition and the observation of the magneto-optical Kerr effect in 2D magnets.   Controlling magnetism in 2D CrI3 by electrostatic doping    pp549 - 553 Shengwei Jiang, Lizhong Li, Zefang Wang, Kin Fai Mak & Jie Shan doi:10.1038/s41565-018-0135-x Electrostatic doping in vertical van der Waals CrI3–graphene heterostructures provides means to control the magnetic properties of monolayer and bilayer CrI3.   Electric-field control of magnetism in a few-layered van der Waals ferromagnetic semiconductor    pp554 - 559 Zhi Wang, Tongyao Zhang, Mei Ding, Baojuan Dong, Yanxu Li et al. doi:10.1038/s41565-018-0186-z Few-layer semiconducting Cr2Ge2Te6 shows bipolar gate-tuned magnetism below its ferromagnetic Curie temperature.   Switchable geometric frustration in an artificial-spin-ice–superconductor heterosystem    pp560 - 565 Yong-Lei Wang, Xiaoyu Ma, Jing Xu, Zhi-Li Xiao, Alexey Snezhko et al. doi:10.1038/s41565-018-0162-7 A superconducting thin film placed underneath a reconfigurable artificial-spin-ice structure in situ allows controllable geometric frustration with high degeneracy to be achieved.   Band structure engineering of 2D materials using patterned dielectric superlattices    pp566 - 571 Carlos Forsythe, Xiaodong Zhou, Kenji Watanabe, Takashi Taniguchi, Abhay Pasupathy et al. doi:10.1038/s41565-018-0138-7 A new superlattice fabrication process on 2D material heterostructures enables the observation of replica Dirac cones in graphene as well as Hofstadter's fractal magnetic spectrum under triangular and square superlattice symmetries.   Continuous-wave upconverting nanoparticle microlasers    pp572 - 577 Angel Fernandez-Bravo, Kaiyuan Yao, Edward S. Barnard, Nicholas J. Borys, Elizabeth S. Levy et al. doi:10.1038/s41565-018-0161-8 Energy-looping excitation in lanthanide-doped upconverting nanoparticles enables low-threshold continuous-wave lasing in stand-alone microcavities.   Single entity resolution valving of nanoscopic species in liquids    pp578 - 582 Patric Eberle, Christian Höller, Philipp Müller, Maarit Suomalainen, Urs F. Greber et al. doi:10.1038/s41565-018-0150-y A switchable electrokinetic nanovalving mechanism is capable of isolating a wide variety of single nanoscopic entities, down to single macromolecules, from an ensemble, and guiding, confining, releasing and sorting them in a broad range of ionic salt concentrations, up to biological buffer levels.   Articles   Broadband, electrically tunable third-harmonic generation in graphene    pp583 - 588 Giancarlo Soavi, Gang Wang, Habib Rostami, David G. Purdie, Domenico De Fazio et al. doi:10.1038/s41565-018-0145-8 Gate tunable and ultrabroadband third-harmonic generation can be achieved in graphene, paving the way for electrically tunable broadband frequency converters for applications in optical communications and signal processing.   Carbon nanotube bundles with tensile strength over 80 GPa    pp589 - 595 Yunxiang Bai, Rufan Zhang, Xuan Ye, Zhenxing Zhu, Huanhuan Xie et al. doi:10.1038/s41565-018-0141-z Ultralong defect-free and well-aligned carbon nanotube bundles exhibit the highest tensile strength among known strong fibres.   A scalable multi-photon coincidence detector based on superconducting nanowires    pp596 - 601 Di Zhu, Qing-Yuan Zhao, Hyeongrak Choi, Tsung-Ju Lu, Andrew E. Dane et al. doi:10.1038/s41565-018-0160-9 Superconducting nanowires can be engineered to realize scalable coincidence detectors of single photons.   Exfoliation of a non-van der Waals material from iron ore hematite    pp602 - 609 Aravind Puthirath Balan, Sruthi Radhakrishnan, Cristiano F. Woellner, Shyam K. Sinha, Liangzi Deng et al. doi:10.1038/s41565-018-0134-y A new non-van der Waals 2D material hematene, exfoliated from natural iron ore hematite, shows ferromagnetic ordering and enhanced photocatalytic activity.   Full control of ligand positioning reveals spatial thresholds for T cell receptor triggering    pp610 - 617 Haogang Cai, James Muller, David Depoil, Viveka Mayya, Michael P. Sheetz et al. doi:10.1038/s41565-018-0113-3 Using a nanofabricated array platform to precisely control ligand organization at the single-molecule level, the authors illuminate the role of geometry in T cell receptor signalling.   Amendments & Corrections   Publisher Correction: Direct imaging of the electron liquid at oxide interfaces    p618 Kyung Song, Sangwoo Ryu, Hyungwoo Lee, Tula R. Paudel, Christoph T. Koch et al. doi:10.1038/s41565-018-0137-8 Publisher Correction: Nanobiophotonics: Nature-inspired sensors    p618 Wolfgang Fink doi:10.1038/s41565-018-0201-4 Advertisement Nature Briefing is an essential round-up of science news, opinion and analysis, free in your inbox every weekday. With Nature Briefing, we'll keep you updated on the latest research, so you can focus on yours. Click here to sign up.   Natureevents is a fully searchable, multi-disciplinary database designed to maximise exposure for events organisers. The contents of the Natureevents Directory are now live. 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