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Editorial

Science outreach in the post-truth age p929

doi:10.1038/nnano.2017.217

Outreach activities, like those related to National Nanotechnology Day, contribute to building a science culture, narrowing the gap between science and the public.


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Correspondence

Absence of redshift in the direct bandgap of silicon nanocrystals with reduced size pp930 - 932

Jun-Wei Luo, Shu-Shen Li, Ilya Sychugov, Federico Pevere, Jan Linnros & Alex Zunger

doi:10.1038/nnano.2017.190

See also: Correspondence by de Boer et al.


Reply to 'Absence of redshift in the direct bandgap of silicon nanocrystals with reduced size' pp932 - 933

Wieteke de Boer, Dolf Timmerman, Irina Yassievich, Antonio Capretti & Tom Gregorkiewicz

doi:10.1038/nnano.2017.202

See also: Correspondence by Luo et al.


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Thesis

Science policy in the days of Trump pp934 - 935

Chris Toumey

doi:10.1038/nnano.2017.211

Chris Toumey explains why the actions on science policy taken so far by the current US administration are cause for concern.


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Research Highlights

Our choice from the recent literature p936

doi:10.1038/nnano.2017.213


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News and Views

Donor qubits in silicon: Electrical control of nuclear spins pp937 - 938

Andrea Morello

doi:10.1038/nnano.2017.158

One-dimensional microwave Bragg gratings make it possible to coherently control donor nuclear spins in silicon by purely electrical means.

See also: Letter by Sigillito et al.


Optoelectronics: Letting photons out of the gate pp938 - 939

James F. Cahoon

doi:10.1038/nnano.2017.199

The unique photoresponse of a porous silicon nanowire can be harnessed to make a highly efficient photon-gated transistor with an on–off ratio comparable to that of a conventional electronic switch.

See also: Letter by Kim et al.


Internet of things: Sensing without power pp940 - 941

Vladimir A. Aksyuk

doi:10.1038/nnano.2017.185

A thermally activated micromechanical switch delivers an electrical readout signal only when irradiated by a narrowband mid-infrared light, thanks to a metamaterial element that converts light into heat.

See also: Letter by Qian et al.


Spintronics: Anatomy of spin–orbit torques pp941 - 942

Kei Yamamoto & Hidekazu Kurebayashi

doi:10.1038/nnano.2017.183

The use of time-resolved X-ray microscopy allows a direct visualization of the magnetization switching for nanomagnets under the effect of spin–orbit torques.

See also: Article by Baumgartner et al.


Spin qubits: Germanium–vacancy defects join the family p942

Giacomo Prando

doi:10.1038/nnano.2017.212


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Perspective

Towards phase-coherent caloritronics in superconducting circuits pp944 - 952

Antonio Fornieri & Francesco Giazotto

doi:10.1038/nnano.2017.204

Phase-coherent caloritronics is an emerging field of nanoscience based on the possibility to control and manipulate heat currents thanks to the long-range phase coherence of the superconducting condensate


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Letters

Magnetic quantum phase transition in Cr-doped Bi2(SexTe1−x)3 driven by the Stark effect pp953 - 957

Zuocheng Zhang, Xiao Feng, Jing Wang, Biao Lian, Jinsong Zhang, Cuizu Chang, Minghua Guo, Yunbo Ou, Yang Feng, Shou-Cheng Zhang, Ke He, Xucun Ma, Qi-Kun Xue & Yayu Wang

doi:10.1038/nnano.2017.149

The electric field generated by a gate electrode is exploited to trigger a reversible ferromagnetic–paramagnetic phase transition in a magnetic topological insulator close to a quantum critical point.


All-electric control of donor nuclear spin qubits in silicon pp958 - 962

Anthony J. Sigillito, Alexei M. Tyryshkin, Thomas Schenkel, Andrew A. Houck & Stephen A. Lyon

doi:10.1038/nnano.2017.154

Coplanar photonic bandgap resonators are used to implement an all-electrical method for controlling neutral 31P and 75As donor nuclear spins in silicon.

See also: News and Views by Morello


Photon-triggered nanowire transistors pp963 - 968

Jungkil Kim, Hoo-Cheol Lee, Kyoung-Ho Kim, Min-Soo Hwang, Jin-Sung Park, Jung Min Lee, Jae-Pil So, Jae-Hyuck Choi, Soon-Hong Kwon, Carl J. Barrelet & Hong-Gyu Park

doi:10.1038/nnano.2017.153

Porous silicon nanowires enable optical switching and electrical current amplification in a photon-triggered transistor.

See also: News and Views by Cahoon


Zero-power infrared digitizers based on plasmonically enhanced micromechanical photoswitches pp969 - 973

Zhenyun Qian, Sungho Kang, Vageeswar Rajaram, Cristian Cassella, Nicol E. McGruer & Matteo Rinaldi

doi:10.1038/nnano.2017.147

Infrared light of specific wavelength triggers a passive microsystem capable of producing a digitized output bit.

See also: News and Views by Aksyuk


Topical tissue nano-transfection mediates non-viral stroma reprogramming and rescue pp974 - 979

Daniel Gallego-Perez, Durba Pal, Subhadip Ghatak, Veysi Malkoc, Natalia Higuita-Castro, Surya Gnyawali, Lingqian Chang, Wei-Ching Liao, Junfeng Shi, Mithun Sinha, Kanhaiya Singh, Erin Steen, Alec Sunyecz, Richard Stewart, Jordan Moore, Thomas Ziebro, Robert G. Northcutt, Michael Homsy, Paul Bertani, Wu Lu, Sashwati Roy, Savita Khanna, Cameron Rink, Vishnu Baba Sundaresan, Jose J. Otero, L. James Lee & Chandan K. Sen

doi:10.1038/nnano.2017.134

Arrayed nanochannels can be used to controllably transfect and reprogram tissues in vivo for applications in regenerative medicine and cell-based therapies.


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Articles

Spatially and time-resolved magnetization dynamics driven by spin–orbit torques pp980 - 986

Manuel Baumgartner, Kevin Garello, Johannes Mendil, Can Onur Avci, Eva Grimaldi, Christoph Murer, Junxiao Feng, Mihai Gabureac, Christian Stamm, Yves Acremann, Simone Finizio, Sebastian Wintz, Jörg Raabe & Pietro Gambardella

doi:10.1038/nnano.2017.151

Time-resolved X-ray microscopy reveals the mechanism and speed of current-induced magnetization switching of Co/Pt dots under the combined effect of spin-orbit torques and Dzyaloshinskii–Moriya interaction.

See also: News and Views by Yamamoto & Kurebayashi


Room-temperature continuous-wave lasing from monolayer molybdenum ditelluride integrated with a silicon nanobeam cavity pp987 - 992

Yongzhuo Li, Jianxing Zhang, Dandan Huang, Hao Sun, Fan Fan, Jiabin Feng, Zhen Wang & C. Z. Ning

doi:10.1038/nnano.2017.128

A silicon nanobeam cavity laser integrated with monolayer molybdenum ditelluride enables room-temperature lasing in the near infrared.


Air-stable and freestanding lithium alloy/graphene foil as an alternative to lithium metal anodes pp993 - 999

Jie Zhao, Guangmin Zhou, Kai Yan, Jin Xie, Yuzhang Li, Lei Liao, Yang Jin, Kai Liu, Po-Chun Hsu, Jiangyan Wang, Hui-Ming Cheng & Yi Cui

doi:10.1038/nnano.2017.129

Lithium alloy nanoparticles are encased inside few-layer graphene to yield a chemically stable, high-capacity anode with promising performance in a full-cell configuration.


Controlling energy flow in multimetallic nanostructures for plasmonic catalysis pp1000 - 1005

Umar Aslam, Steven Chavez & Suljo Linic

doi:10.1038/nnano.2017.131

Localized surface plasmon resonance can be used to control the energy flow in plasmonic core-shell Ag–Pt nanocubes and excite energetic charge carriers in the thin Pt shell, which can then drive CO oxidation.


Electromagnetized gold nanoparticles mediate direct lineage reprogramming into induced dopamine neurons in vivo for Parkinson's disease therapy pp1006 - 1014

Junsang Yoo, Euiyeon Lee, Hee Young Kim, Dong-ho Youn, Junghyun Jung, Hongwon Kim, Yujung Chang, Wonwoong Lee, Jaein Shin, Soonbong Baek, Wonhee Jang, Won Jun, Soochan Kim, Jongki Hong, Hi-Joon Park, Christopher J. Lengner, Sang Hyun Moh, Youngeun Kwon & Jongpil Kim

doi:10.1038/nnano.2017.133

A proof-of-principle study shows that electromagnetic field-based in vivo lineage conversion can be used as a therapeutic strategy for the treatment of neurodegenerative disorders.


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Corrigendum

Corrigendum: Monitoring the orientation of rare-earth-doped nanorods for flow shear tomography p1015

Jongwook Kim, Sébastien Michelin, Michiel Hilbers, Lucio Martinelli, Elodie Chaudan, Gabriel Amselem, Etienne Fradet, Jean-Pierre Boilot, Albert M. Brouwer, Charles N. Baroud, Jacques Peretti & Thierry Gacoin

doi:10.1038/nnano.2017.206


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In The Classroom

Students step up p1016

Lisa E. Friedersdorf, Quinn A. Spadola & Brendan Ryan

doi:10.1038/nnano.2017.210

Universities and institutions in the United States are getting ready to celebrate nanotechnology and its achievements for National Nanotechnology Day. Lisa Friedersdorf, Quinn Spadola and Brendan Ryan share students' plans for the occasion.


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