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Article
01 April 2022 | Open Access

Activity-induced interactions and cooperation of artificial microswimmers in one-dimensional environments

Biological microswimmers such as bacteria show collective motion that is made possible by an intricate interplay of sensing and signaling. Ketzetzi et al. reproduce this phenomenon in a catalytic system… show more

Stefania Ketzetzi, Melissa Rinaldin & Daniela J. Kraft

Article
01 April 2022 | Open Access

Single-crystal two-dimensional material epitaxy on tailored non-single-crystal substrates

The heteroepitaxial growth of crystalline 2D materials is usually based on single-crystal substrates. Here, the authors demonstrate that single-crystal graphene and hexagonal boron nitride films can be… show more

Xin Li, Guilin Wu & Wenxin Tang

Article
01 April 2022 | Open Access

Photo-induced non-volatile VO2 phase transition for neuromorphic ultraviolet sensors

Bioinspired neuromorphic vision components are highly desired for the emerging in-sensor computing technology. Here, Ge et al. develop an array of optoelectronic synapses capable of memorizing and processing… show more

Ge Li, Donggang Xie & Chen Ge

Article
01 April 2022 | Open Access

Shape and stiffness memory ionogels with programmable pressure-resistance response

Flexible pressure sensors require functional materials accounting for mechanical compliance and electrical performance simultaneously but sensor materials often suffer from limited compressibility which decreases… show more

Shuyun Zhuo, Cheng Song & Mingjie Liu

Article
01 April 2022 | Open Access

High-performance hysteresis-free perovskite transistors through anion engineering

Progress on high-performance transistor employing perovskite channels has been limited to date. Here, Zhu et al. report hysteresis-free tin-based perovskite thin-film transistors with high hole mobility of 20… show more

Huihui Zhu, Ao Liu & Yong-Young Noh

Article
01 April 2022 | Open Access

Bridging the gap between atomically thin semiconductors and metal leads

Barrier-free metal-semiconductor interfaces are crucial to improve the performance of 2D electronic devices. Here, the authors report a strategy to induce local bonding distortion in 2D transition metal… show more

Xiangbin Cai, Zefei Wu & Ning Wang

Article
01 April 2022 | Open Access

Dual-wavelength switchable single-mode lasing from a lanthanide-doped resonator

Dual-wavelength lasers are gaining importance for photonic applications. In this work the authors demonstrate that by incorporating a lanthanidedoped material into the size-mismatched coupled microcavities, it is… show more

Limin Jin, Xian Chen & Qinghai Song

Article
31 March 2022 | Open Access

Biomimetic KcsA channels with ultra-selective K+ transport for monovalent ion sieving

Materials for the selective transport of K+ have application in a variety of fields including water desalination and separation processes. Here the authors report charged porous subnanometer cages that are… show more

Weiwen Xin, Jingru Fu & Liping Wen

Article
31 March 2022 | Open Access

Magnetic refrigeration material operating at a full temperature range required for hydrogen liquefaction

Application of magnetic refrigeration (MR) for hydrogen liquefaction is limited by lack of MR materials with a large magnetocaloric effect (MCE). Here the authors show a series of MR materials with a large and… show more

Xin Tang, H. Sepehri-Amin & K. Hono

Article
31 March 2022 | Open Access

Ferroelectric photosensor network: an advanced hardware solution to real-time machine vision

Robust, fast, and low-power hardware platforms are desirable for the implementation of real-time machine vision. Here the authors develop a computing-in-sensor network using ferroelectric photo sensors with… show more

Boyuan Cui, Zhen Fan & Jun-Ming Liu

Article
31 March 2022 | Open Access

Stress distribution and surface shock wave of drop impact

The dynamic process behind the low-speed drop-impact erosion remains challenging to understand. Cheng et al. develop a method of high-speed microscopy, revealing the fast propagation of self-similar stress maxima… show more

Ting-Pi Sun, Franco Álvarez-Novoa & Xiang Cheng

Article
31 March 2022 | Open Access

Double helical π-aggregate nanoarchitectonics for amplified circularly polarized luminescence

Synthesized or self-assembled helical architectures advance the development of chiral functional materials. Here the authors report a selective-recognized and chirality-matched co-assembly strategy for the… show more

Yuan Wang, Dian Niu & Minghua Liu

Article
30 March 2022 | Open Access

Electrically driven reprogrammable phase-change metasurface reaching 80% efficiency

The authors demonstrate an efficient platform for electrically driven reconfigurable metasurfaces by using Ge2Sb2Te5 to realize non-volatile, reversible, multilevel, and fast optical modulation and wavefront… show more

Sajjad Abdollahramezani, Omid Hemmatyar & Ali Adibi

Article
30 March 2022 | Open Access

Square and rhombic lattices of magnetic skyrmions in a centrosymmetric binary compound

Typically, skyrmions appear in magnet systems which are non-centrosymmetric. Here, using neutron and X-ray scattering, Takagi et al show the emergence of a skyrmion phase in the centrosymmetric material EuAl4.… show more

Rina Takagi, Naofumi Matsuyama & Shinichiro Seki

Article
29 March 2022 | Open Access

Electric control of a canted-antiferromagnetic Chern insulator

Exotic states emerge from the interplay between band topology and ferromagnetism, but it remains less known in canted-antiferromagnetic phase. Here, the authors realize a canted-antiferromagnetic Chern insulator… show more

Jiaqi Cai, Dmitry Ovchinnikov & Xiaodong Xu

Article
29 March 2022 | Open Access

Giant second harmonic transport under time-reversal symmetry in a trigonal superconductor

Even-order nonlinear transport is a powerful probe of quantum materials, but such studies in superconductors have been limited to those which break time-reversal symmetry. Here, the authors observe second-order… show more

Yuki M. Itahashi, Toshiya Ideue & Yoshihiro Iwasa

Article
28 March 2022 | Open Access

Wafer-scale epitaxial modulation of quantum dot density

Nucleation control of self-assembled quantum dots is challenging. Here, the authors employ conventional molecular beam epitaxy to achieve wafer-scale density modulation of high-quality quantum dots with tunable… show more

N. Bart, C. Dangel & A. Ludwig

Article
28 March 2022 | Open Access

Hollow-core optical fibre sensors for operando Raman spectroscopy investigation of Li-ion battery liquid electrolytes

New analytical tools are needed to identify chemical degradation and failure mechanisms in Li-ion batteries. Here, the authors report an operando Raman spectroscopy method, based on hollow-core optical fibres,… show more

Ermanno Miele, Wesley M. Dose & Tijmen G. Euser

Article
28 March 2022 | Open Access

Current-induced Néel order switching facilitated by magnetic phase transition

Electrical manipulation of antiferromagnetic order is crucial for future memory devices, but existing switching schemes require a large current density. Here, the authors achieve record low current density… show more

Hao Wu, Hantao Zhang & Kang L. Wang

Article
28 March 2022 | Open Access

Giant tunable spin Hall angle in sputtered Bi2Se3 controlled by an electric field

Controlling the spin Hall angle is significant to tunable and energy-efficient spintronic devices. Here, the authors demonstrate that the spin Hall angle in Bi2Se3 can be tuned and even enhanced about 600%… show more

Qi Lu, Ping Li & Ming Liu

Article
25 March 2022 | Open Access

Topoarchitected polymer networks expand the space of material properties

Synthesizing architected materials with strong adhesion has been challenging. Here the authors fabricate architected polymer networks by sequential polymerization and photolithography, and attain adherent… show more

Xiao Liu, Jingping Wu & Jian Hu

Article
25 March 2022 | Open Access

Ultrafast photothermoelectric effect in Dirac semimetallic Cd3As2 revealed by terahertz emission

Many topological semimetals are excellent thermoelectric materials, but previous studies were limited to steady-state properties. Here, the authors observe a transient thermoelectric response in Cd3As2 by… show more

Wei Lu, Zipu Fan & Dong Sun

Article
25 March 2022 | Open Access

The speed limit of optoelectronics

Though strong-field induced carrier excitation allows for exploring ultrafast electronic properties of a material, characterizing post-excitation dynamics is a challenge. Here, the authors report linear petahertz… show more

M. Ossiander, K. Golyari & M. Schultze