Nanoscale devices

  • Article
    | Open Access

    The Kondo effect has been observed in a variety of systems, including carbon nanotube quantum dots and graphene in the presence of impurities. Here, the authors report the observation of the Kondo effect in bilayer graphene quantum dots and study its interplay with weak spin-orbit coupling.

    • Annika Kurzmann
    • , Yaakov Kleeorin
    •  & Klaus Ensslin
  • Article
    | Open Access

    Spatial light modulators (SLM) provide tailored light fields for many applications. Here, the authors present an SLM device based on an organic electro-optic material that manipulates the properties of individual pixels by electronic signals at speeds up to 50 MHz.

    • Ileana-Cristina Benea-Chelmus
    • , Maryna L. Meretska
    •  & Federico Capasso
  • Article
    | Open Access

    Reducing the thickness of flexible electronics is crucial to achieve better conformability and mechanical flexibility. Here, the authors demonstrate all-solution processed OFET with total thickness < 150 nm, with high transparency, which allows the device to conformally adhere onto non-planar surfaces, such as human skin.

    • Fabrizio Antonio Viola
    • , Jonathan Barsotti
    •  & Mario Caironi
  • Article
    | Open Access

    Tree-based machine learning algorithms are known to be explainable and effective even trained on limited datasets, however difficult to optimize on conventional digital hardware. The authors apply analog content addressable memory to accelerate tree-based model inference for improved performance.

    • Giacomo Pedretti
    • , Catherine E. Graves
    •  & John Paul Strachan
  • Article
    | Open Access

    Assembling nanoparticles on surfaces has great technological potential. Here, Tierno et al demonstrate the confinement of magnetic nanoparticles in traps created by magnetic domain walls. The magnetic gradient and location of the domain walls can be finely tuned, allowing for precise control of the constituent nanoparticles.

    • Pietro Tierno
    • , Tom H. Johansen
    •  & Arthur V. Straube
  • Article
    | Open Access

    Nanomechanical resonators can be improved through rational design. Using an inverse design approach the authors achieve ultra-coherent resonators and pave the way towards the engineering of high performance micro- and nanomechanical resonators.

    • Dennis Høj
    • , Fengwen Wang
    •  & Ulrik Lund Andersen
  • Article
    | Open Access

    The versatility of DNA has inspired many single-molecule investigations utilizing nanotechnology. Harashima et al. have a somewhat different take on the subject and study a zipper configuration bridging electrodes that resembles an active electro-mechanical component instead.

    • Takanori Harashima
    • , Shintaro Fujii
    •  & Tomoaki Nishino
  • Article
    | Open Access

    Recently there has been an interest in utilising memristors as physical temporal kernels. Here, Jang et al demonstrate a physical temporal kernel using a memristor combined with a capacitor and resistor, where the additional circuit elements can be varied to allow the system to tackle a diverse range of tasks.

    • Yoon Ho Jang
    • , Woohyun Kim
    •  & Cheol Seong Hwang
  • Article
    | Open Access

    Boltzmann Machines offer the potential of more efficient solutions to combinatorial problems compared to von Neumann computing architectures. Here, Yan et al introduce a stochastic memristor with dynamically tunable properties, a vital feature for the efficient implementation of a Boltzmann Machine.

    • Xiaodong Yan
    • , Jiahui Ma
    •  & Han Wang
  • Article
    | Open Access

    Artificial sodium channels open up the way to new separation technologies but remains highly challenging. In this work, the authors report an artificial sodium-selective ionic device, built on porous crown-ether crystals with a sodium ion selectivity against calcium ions exceeding that one of biological ion channel counterparts.

    • Tingyan Ye
    • , Gaolei Hou
    •  & Jun Gao
  • Article
    | Open Access

    The superior density of passive analog memristive devices can potentially enable efficient implementation of very large scale neural networks; however, device to device variability is currently too large to take advantage of this. Here, Kim et al demonstrate an impressive reduction in this variability, with a large passive memristive array.

    • H. Kim
    • , M. R. Mahmoodi
    •  & D. B. Strukov
  • Article
    | Open Access

    Electron beam lithography (EBL) is renowned to provide fabrication resolution in the deep nanometer scale but their incapability of arbitrary 3D nanofabrication poses a major limitation to the technique. Here, the authors demonstrate a manufacturing technique of functional 3d nanostructures at a resolution of sub-15 nm using voltage-regulated 3d EBL.

    • Nan Qin
    • , Zhi-Gang Qian
    •  & Tiger H. Tao
  • Article
    | Open Access

    Efficient conversion of microwave photons into electrical current would enable several applications in quantum technologies, especially if one could step outside of the gated-time regime. Here, the authors demonstrate continuous-time microwave photoconversion in double quantum dots with 6% efficiency.

    • Waqar Khan
    • , Patrick P. Potts
    •  & Ville F. Maisi
  • Article
    | Open Access

    Mechanical motions in hybrid sp2/sp3 -hybrid nanocarbon peapods might lead to promising materials applications, but have been insufficiently explored. Here the authors demonstrate that a diamondoid molecule trapped inside a carbonaceous cylinder undergoes solid-state rotations at terahertz frequencies.

    • Taisuke Matsuno
    • , Seiya Terasaki
    •  & Hiroyuki Isobe
  • Article
    | Open Access

    The miniaturization of biocompatible microsystems that enable self-sufficiency and autarkic operations is ever increasing. Here, the authors demonstrate a robust integratable nano-biosupercapacitor with enhanced performance in complex biological fluids, thus enabling autarkic sensor operation in blood.

    • Yeji Lee
    • , Vineeth Kumar Bandari
    •  & Oliver G. Schmidt
  • Article
    | Open Access

    Synthetic anti-ferromagnets, where two ferromagnetic layers are coupled anti-ferromagnetically via a spacer, are known for their very large current-induced domain wall velocities. Here, Guan et al show that the velocity of the domain walls in synthetic anti-ferromagnetic nanowires can be tuned over a wide range due to reversible oxidization via ionic liquid gating.

    • Yicheng Guan
    • , Xilin Zhou
    •  & Stuart S. P. Parkin
  • Article
    | Open Access

    Advanced fabrication techniques enable a wide range of quantum devices, such as the realization of a topological qubit. Here, the authors introduce an on-chip fabrication technique based on shadow walls to implement topological qubits in an InSb nanowire without fabrication steps such as lithography and etching.

    • Sebastian Heedt
    • , Marina Quintero-Pérez
    •  & Leo P. Kouwenhoven
  • Article
    | Open Access

    The typical approach to electronics is to integrate sensors, power units, and controlling components on a printed circuit board (PCB). Here, the authors demonstrate a self-powered and fully integrated combination of sensors and controlling components that is woven, rather than integrated onto a PCB, allowing for wearable health monitoring.”

    • Yuxin Yang
    • , Xiaofei Wei
    •  & Xing Fan
  • Article
    | Open Access

    An avalanche photodiode is an opto-electronic amplifier that uses impact ionization to provide enhanced sensitivity at the expense of excess noise. In this manuscript, the authors demonstrate that a small amount of Bismuth (Bi) in Gallium Arsenide (GaAs) avalanche photodiodes significantly reduces this excess noise.

    • Yuchen Liu
    • , Xin Yi
    •  & John P. R. David
  • Article
    | Open Access

    High temperature usually decreases the output of triboelectric nanogenerator because of the increased dissipation of triboelectric charges. Here, the authors design and fabricate a temperature difference triboelectric nanogenerator to enhance the electrical output in high temperature environment.

    • Bolang Cheng
    • , Qi Xu
    •  & Yong Qin
  • Article
    | Open Access

    Semiconductor surface states often stand in the way of device performance, but here, the authors take advantage of them for wavelength conversion. They present a compact, passive conversion device insensitive to optical alignment by using plasmon-coupled surface states that enable the efficient conversion without nonlinear phenomena.

    • Deniz Turan
    • , Ping Keng Lu
    •  & Mona Jarrahi
  • Article
    | Open Access

    Single-molecular magnets (SMM) are promising candidates for quantum technologies given the ease of repeatable manufacture and potential as qudits. Here, Biard et al succeed in electronically reading out a SMM containing two high-spin terbium atoms, allowing for a 16 dimensional Hilbert space.

    • Hugo Biard
    • , Eufemio Moreno-Pineda
    •  & Franck Balestro
  • Article
    | Open Access

    Nuclear spins in diamond are promising for applications in quantum technologies due to their long coherence times. Here, the authors demonstrate a scalable electrical readout of individual intrinsic 14N nuclear spins in diamond, mediated by hyperfine coupling to electron spin of the NV center, as a step towards room-temperature nanoscale diamond quantum devices.

    • Michal Gulka
    • , Daniel Wirtitsch
    •  & Milos Nesladek
  • Article
    | Open Access

    Refraction between anisotropic media is still an unexplored phenomenon. Here, the authors investigate the propagation of hyperbolic phonon polaritons traversing α-MoO3 nanoprisms, showing a bending-free refraction effect and sub-diffractional focusing with foci size as small as 1/50 of the light wavelength in free space.

    • J. Duan
    • , G. Álvarez-Pérez
    •  & P. Alonso-González
  • Article
    | Open Access

    The integration of nano-molecules into microelectronic circuitry is challenging. Here, the authors provide a scalable method for contacting a self-assembled monolayer of nanoparticles with a single layer of graphene that produces single-electron effects, in the form of a Coulomb staircase, with a yield of at least 70%.

    • Joel M. Fruhman
    • , Hippolyte P.A.G. Astier
    •  & Christopher J. B. Ford
  • Article
    | Open Access

    Skyrmions - nanoscale, topological spin textures - are promising elements for next-generation computing due to their efficient coupling to currents in racetrack devices. Here, Tan et al. examine over 20,000 instances of current induced skyrmion motion to unveil a comprehensive picture of skyrmion dynamics across currents and fields.

    • Anthony K. C. Tan
    • , Pin Ho
    •  & Anjan Soumyanarayanan
  • Article
    | Open Access

    Recurrent spiking neural networks have garnered interest due to their energy efficiency; however, they suffer from lower accuracy compared to conventional neural networks. Here, the authors present an alternative neuron model and its efficient hardware implementation, demonstrating high classification accuracy across a range of datasets.

    • Ahmed Shaban
    • , Sai Sukruth Bezugam
    •  & Manan Suri
  • Article
    | Open Access

    Long-range coherent spin-qubit transfer between semiconductor quantum dots requires understanding and control over associated errors. Here, the authors achieve high-fidelity coherent state transfer in a Si double quantum dot, underpinning the prospects of a large-scale quantum computer.

    • J. Yoneda
    • , W. Huang
    •  & A. S. Dzurak
  • Article
    | Open Access

    Optical readout techniques for nanomechanical force probes usually generate more heat than what can be dissipated through the nanoresonators. Here, the authors use an interferometric readout scheme, achieving large force sensitivity using suspended silicon carbide nanowires at dilution temperatures.

    • Francesco Fogliano
    • , Benjamin Besga
    •  & Olivier Arcizet
  • Article
    | Open Access

    Band alignment engineering is important to realize high performance and multifunctionality in a specific van der Waals heterojunction. Here, the authors observe band alignment transition of the heterojunction in a ferroelectric-tuned van der Waals heterojunction device with high performance.

    • Yan Chen
    • , Xudong Wang
    •  & Jianlu Wang
  • Article
    | Open Access

    Rapid, accurate and specific point-of-care diagnostics can help manage and contain fast-spreading infections. Here, the authors present a nanopore-based system that uses artificial intelligence to discriminate between four coronaviruses in saliva, with little need for sample pre-processing.

    • Masateru Taniguchi
    • , Shohei Minami
    •  & Kazunori Tomono
  • Article
    | Open Access

    Printed biosensors are important for health monitoring and research purposes. Here, the authors report on the development of a soft poroelastic silicone based sensor which can be easily printed and is resistant to mechanical strain hysteresis, allowing for more accurate electrophysiology readings and imaging.

    • Bongjoong Kim
    • , Arvin H. Soepriatna
    •  & Chi Hwan Lee
  • Article
    | Open Access

    The authors present a bi-functional metasurface, combining structural color printing observed under white light and polarization encoded It is appropriate. vectorial holography. A pixelated design is used encode multiple holographic images, and they demonstrate an electrically tunable optical security platform.

    • Inki Kim
    • , Jaehyuck Jang
    •  & Junsuk Rho
  • Article
    | Open Access

    Here, the authors report the realization of an active pixel image sensor array composed by 64 pairs of switching transistors and phototransistors, based on wafer-scale bilayer MoS2. The device exhibits sensitive photoresponse under RGB light illumination, showing the potential of 2D MoS2 for image sensing applications.

    • Seongin Hong
    • , Nicolò Zagni
    •  & Sunkook Kim
  • Article
    | Open Access

    Here, authors report on acoustic cavities in 2D materials operating in the 50–600 GHz range and show that quality factors approach the limit set by lattice anharmonicity. Functionality expanded by heterogeneities (steps and interfaces) is demonstrated through coupled cavities and frequency comb generation.

    • Maxim K. Zalalutdinov
    • , Jeremy T. Robinson
    •  & Brian H. Houston
  • Article
    | Open Access

    Creation of high-order architectures using DNA devices is of interest for increasing the complexity of synthetic systems. Here, the authors, inspired by biological oligomers, create DNA dimers and oligomers that combining rotation and walking to make high-order systems with more complex conformational changes.

    • Ling Xin
    • , Xiaoyang Duan
    •  & Na Liu
  • Article
    | Open Access

    Flow through nanometer scale channels facilitates an unmasked study of water-surface molecular interactions. Here, Keerthi et al. show with conduits made from graphite and hexagonal boron nitride that strong hydrophobicity does not rule out enhanced stickiness and friction.

    • Ashok Keerthi
    • , Solleti Goutham
    •  & Boya Radha
  • Article
    | Open Access

    Memory-centric computing refers to computing designs where the memory, rather than the processor is central in the architecture. Here, the authors demonstrate a self-rectifying resistive memory cell that exhibits impressive endurance, and low power consumption, making it suitable for memory-centric applications.

    • Kanghyeok Jeon
    • , Jeeson Kim
    •  & Gun Hwan Kim
  • Article
    | Open Access

    Here, the authors present a high-speed photothermal spatial light modulator which can generate a step-like wavefront change without diffraction artifacts. They use this to perform quantitative phase imaging, capturing sub-millisecond motion with a nanometer resolution in 3D.

    • Hadrien M. L. Robert
    • , Kristýna Holanová
    •  & Marek Piliarik
  • Article
    | Open Access

    Spin torque oscillators (STOs) are attractive potential alternative for many high frequency applications, due to their small area and CMOS compatibility. Here, Sharma et al succeed in the electrical synchronization of four STOs, and use their setup to demonstrate wireless and battery-free energy harvesting using eight STOs.

    • Raghav Sharma
    • , Rahul Mishra
    •  & Hyunsoo Yang
  • Article
    | Open Access

    Rectenna, which consist of a microscale antenna, combined with a rectifying diode, have great potential in energy harvesting, however, achieving high responsivity and low resistance is extremely difficult. Here, the authors demonstrate a metal-insulator-insulator metal diode which overcomes these limitations.

    • Amina Belkadi
    • , Ayendra Weerakkody
    •  & Garret Moddel
  • Article
    | Open Access

    Andreev reflection is normally known to occur at a metal-superconductor interface. Here, Hashisaka et al. observe an Andreev-like process in a narrow junction between fractional and integer quantum Hall states originating from a topological quantum many-body effect instead of superconductivity.

    • M. Hashisaka
    • , T. Jonckheere
    •  & K. Muraki
  • Article
    | Open Access

    The reduction in thermal conductivity is usually achieved by increasing the scattering rate or localization of heat carriers. Here, the authors propose a mechanism to suppress the thermal transport in amorphous systems such as SiTe binary alloys via tailoring the cross-linking network between the atoms.

    • Kiumars Aryana
    • , Derek A. Stewart
    •  & Patrick E. Hopkins