Featured
-
-
Article
| Open AccessNon-Amontons frictional behaviors of grain boundaries at layered material interfaces
This work demonstrates non-Amontons frictional behavior and negative differential friction coefficients at graphene/Pt(111) surface grain boundaries due to dynamic buckling of dislocations, providing vital insights for the design of macroscopic dry superlubric contacts.
- Yiming Song
- , Xiang Gao
- & Ernst Meyer
-
Article
| Open AccessSupercritical mechano-exfoliation process
Here authors present a supercritical CO2-assisted mechano-exfoliation process that eliminates the need for organic solvents. Kinetic investigations offer general guidelines for optimising macroscopic mass transfer and microscopic shear-delamination in supercritical CO2 systems.
- Hao Zhang
- , Qixuan Xiang
- & Huijun Tan
-
Article
| Open AccessRelativistic artificial molecule of two coupled graphene quantum dots at tunable distances
Graphene quantum dots have electronic structures resembling these of atoms. Here, the authors use two of these compounds to construct artificial molecules and study their electronic properties at tunable distances.
- Xiao-Feng Zhou
- , Yu-Chen Zhuang
- & Lin He
-
Article
| Open AccessElectrical spectroscopy of polaritonic nanoresonators
Polaritons are confined hybrid light-matter excitations holding potential for optoelectronic and sensing applications, but their characterization is usually limited to optical spectroscopy. Here, the authors report the electrical spectroscopy of mid-infrared plasmon-phonon polaritons in Au/hBN/graphene nanoresonators, showing high lateral confinement and quality factors.
- Sebastián Castilla
- , Hitesh Agarwal
- & Frank H. L. Koppens
-
Article
| Open AccessUniversality of quantum phase transitions in the integer and fractional quantum Hall regimes
The relationship between the integer and fractional quantum Hall states are of fundamental importance in condensed matter physics. Here, the authors report a universality of phase transitions in both regimes in ultraclean trilayer graphene samples.
- Simrandeep Kaur
- , Tanima Chanda
- & Aveek Bid
-
Article
| Open AccessRobust flat bands in twisted trilayer graphene moiré quasicrystals
Twisted trilayer graphene is predicted to exhibit flat bands for an infinite set of twist angle pairs between the subsequent layers. Here, the authors study several samples with different twist angles and evidence robust flat bands in each of them.
- Chen-Yue Hao
- , Zhen Zhan
- & Lin He
-
Article
| Open AccessGraphene-enabled laser lift-off for ultrathin displays
Laser lift-off (LLO) is a widely utilized process in the manufacturing of flexible electronics, but its application to ultrathin polymeric films can be challenging. Here, the authors report a graphene-enabled LLO method to improve the processability of few-micron-thick polyimide films and organic light-emitting diodes without compromising their quality.
- Sumin Kang
- , Jaehyeock Chang
- & Seungman Kim
-
Article
| Open AccessMetasurface-enabled broadband multidimensional photodetectors
The detection of light intensity, polarization, and spectral information with a single device is desired for efficient optical sensing and computing applications. Here, the authors report the realization of metasurface-assisted graphene photodetectors able to simultaneously detect polarization states and wavelengths of broadband infrared light.
- Hao Jiang
- , Yinzhu Chen
- & Weibo Gao
-
Article
| Open AccessProximity induced charge density wave in a graphene/1T-TaS2 heterostructure
Electronic proximity effects between neighbouring nanoscale materials are an important theme in condensed matter physics. Here, the authors experimentally demonstrate a proximity induced charge density wave in graphene due to the nearby presence of 1T-TaS2.
- Nikhil Tilak
- , Michael Altvater
- & Eva Y. Andrei
-
Article
| Open AccessVideo frame interpolation neural network for 3D tomography across different length scales
This paper demonstrates that an algorithm designed for video augmentation can be efficiently used for 3D tomography reconstruction across the materials science and medical domain, namely across disciplines and length-scales.
- Laura Gambini
- , Cian Gabbett
- & Stefano Sanvito
-
Article
| Open AccessControlling photothermoelectric directional photocurrents in graphene with over 400 GHz bandwidth
Self-powered graphene photodetectors based on the photothermoelectric effect (PTE) could provide low-noise operation in the telecom and mid-infrared ranges, but their bandwidth is usually limited. Here, the authors report the realization of PTE graphene photodetectors integrated with a metamaterial perfect absorber, showing a 3-dB bandwidth above 400 GHz.
- Stefan M. Koepfli
- , Michael Baumann
- & Juerg Leuthold
-
Article
| Open AccessSelf-assembled superstructure alleviates air-water interface effect in cryo-EM
Air-water interface hinders cryo-EM reconstruction and achievable resolution. Here, a superstructure called GSAMs is developed to alleviate the air-water interface effect and improve the efficiency of cryo-EM analysis.
- Liming Zheng
- , Jie Xu
- & Hailin Peng
-
Article
| Open AccessMulti-dimensional optical information acquisition based on a misaligned unipolar barrier photodetector
Multi-dimensional detection of optical information with a single device enables energy- and area-efficient sensing capabilities. Here, the authors report dual-band infrared detectors based on misaligned 2D black phosphorus and black arsenic phosphorus, sensitive to light intensity, spectrum and polarization.
- Shukui Zhang
- , Hanxue Jiao
- & Jianlu Wang
-
Article
| Open AccessCyclododecane-based high-intactness and clean transfer method for fabricating suspended two-dimensional materials
Here, the authors report a polymer-free transfer method to fabricate suspended 2D materials with high intactness and thermal conductivity, facilitating the application of graphene grids for high-resolution electron microscopy.
- Zhao Wang
- , Wenlin Liu
- & Hailin Peng
-
Article
| Open AccessIn-plane staging in lithium-ion intercalation of bilayer graphene
Lithium-ion intercalation of bilayer graphene is shown to proceed via four distinct stages corresponding to different ordered in-plane arrangements of Li ions, commensurate with the underlying graphene lattices in both AA and AB stacking configurations.
- Thomas Astles
- , James G. McHugh
- & Irina V. Grigorieva
-
Article
| Open AccessGraphene-skinned alumina fiber fabricated through metalloid-catalytic graphene CVD growth on nonmetallic substrate and its mass production
Chemical vapor deposition (CVD) of graphene on widely used insulators can promote its application for functional composite materials. Here, the authors report the large-scale production of graphene alumina fibers/fabrics via a metalloid-catalytic CVD growth process on commercial alumina, showing their application for electrical heating and electromagnetic shielding.
- Wenjuan Li
- , Fushun Liang
- & Zhongfan Liu
-
Article
| Open AccessStrongly coupled edge states in a graphene quantum Hall interferometer
Previous measurements of interferometers based on quantum Hall (QH) edge channels have suggested potential electron pairing effects. Here, the authors investigate the coupling between QH edge channels in graphene Aharonov-Bohm (AB) interferometers, proposing a possible single-particle explanation for the apparent interference phase jumps and AB frequency doubling.
- Thomas Werkmeister
- , James R. Ehrets
- & Philip Kim
-
Article
| Open AccessTunable even- and odd-denominator fractional quantum Hall states in trilayer graphene
The fractional quantum Hall effect offers a potential platform to harness non-Abelian anyons. Here, the authors report fractional quantum Hall states in trilayer graphene and drive quantum phase transitions between neighbouring states.
- Yiwei Chen
- , Yan Huang
- & Lei Wang
-
Article
| Open AccessExtremely large magnetoresistance in twisted intertwined graphene spirals
Twisted graphene spirals are emerging material structures that may host topological phenomena. Here, the authors demonstrate extremely large magnetoresistance and a metal-insulator transition in twisted graphene spirals.
- Yiwen Zhang
- , Bo Xie
- & Jun Li
-
Article
| Open AccessEvaporate-casting of curvature gradient graphene superstructures for ultra-high strength structural materials
Through precise adjustments to the curvature gradient inherent in stacked graphene assembly walls, a highly controllable water casting process for self-shaping with an accuracy of ca. 10 μm is demonstrated for making shaped functional materials.
- Bing Lu
- , Li Yu
- & Liangti Qu
-
Article
| Open AccessA popcorn-inspired strategy for compounding graphene@NiFe2O4 flexible films for strong electromagnetic interference shielding and absorption
Cheng Yang and co-workers develop a “popcorn-making-mimic” strategy to fabricate a uniformly compounded graphene@NiFe2O4 composite film with strong electromagnetic interference shielding and absorption capability.
- Mingjie Liu
- , Zhiyuan Wang
- & Cheng Yang
-
Article
| Open AccessElectrical noise spectroscopy of magnons in a quantum Hall ferromagnet
Quantum Hall ferromagnets can host magnons, collective spin-wave excitations, which have possible uses in spin-wave based information processing. Detecting these excitations electrically can be challenging. Here, Kumar, Srivastav, Roy, Park and coauthors demonstrate a noise-based approach to detecting magnons.
- Ravi Kumar
- , Saurabh Kumar Srivastav
- & Anindya Das
-
Article
| Open AccessMultispecies-coadsorption-induced rapid preparation of graphene glass fiber fabric and applications in flexible pressure sensor
To solve the difficult problems with CVD of graphene on non-metallic substrates, researchers used dichloromethane as a C precursor with a multispecies coadsorption mechanism for more efficient graphene coating on fiber fabrics.
- Kun Wang
- , Xiucai Sun
- & Zhongfan Liu
-
Article
| Open AccessQuantum coherence and interference of a single moiré exciton in nano-fabricated twisted monolayer semiconductor heterobilayers
Here, the authors develop a microfabrication method to realize the optical observation of quantum coherence and interference of a single moiré exciton in twisted semiconducting heterobilayers of transition metal dichalcogenides, persisting beyond 10 ps.
- Haonan Wang
- , Heejun Kim
- & Kazunari Matsuda
-
Article
| Open AccessUnderstanding how junction resistances impact the conduction mechanism in nano-networks
The electrical properties of nanostructured networks are often dominated by junctions between the particles. Here, Gabett et al. develop transport models and utilise impedance spectroscopy to quantify the factors limiting conduction in these systems.
- Cian Gabbett
- , Adam G. Kelly
- & Jonathan N. Coleman
-
Article
| Open AccessElectrostatic-induced ion-confined partitioning in graphene nanolaminate membrane for breaking anion–cation co-transport to enhance desalination
Two-dimensional graphene-based membranes have gained much interest, but they suffer from poor rejection for monovalent salts. Here, the authors develop an electrostatic-induced ion partitioning strategy to suppress anion-cation transmembrane co-transport, improving the desalination performance.
- Haiguang Zhang
- , Jiajian Xing
- & Xie Quan
-
Article
| Open AccessLightweight and drift-free magnetically actuated millirobots via asymmetric laser-induced graphene
Millirobots effective application generally depends on cost, scalability, efficient locomotion, and the ability to track target trajectory precisely. Here, authors demonstrate promising graphene-based helical millirobots by introducing asymmetric light pattern distortion to a laser-induced graphene process.
- Yun Chen
- , Yuanhui Guo
- & Ni Zhao
-
Article
| Open AccessElectrochemical-repaired porous graphene membranes for precise ion-ion separation
The preparation of atom-thick lattices with Å-scale pores is desirable for achieving ion selectivity and high ion flux. Here authors present a cm-scale membrane made of atom-thick graphene film hosting zero-dimensional pores spanning only a few Å, repaired using an in situ electrochemical strategy, yielding high Li+/Mg2+ separation performance.
- Zongyao Zhou
- , Kangning Zhao
- & Kumar Varoon Agrawal
-
Article
| Open AccessTuning instability in suspended monolayer 2D materials
Tuning the instabilities of 2D materials can control their wrinkling behavior for interesting physical properties, but still challenging. Here, the authors report a push-to-shear experimental approach to control the wrinkling patterns of monolayer 2D materials and measure their bending stiffness.
- Yuan Hou
- , Jingzhuo Zhou
- & Yang Lu
-
Article
| Open AccessUniversal Murray’s law for optimised fluid transport in synthetic structures
Improving mass transfer through hierarchically porous synthetic materials is a great challenge. Here the authors address this by expanding the original Murray’s law, a biomimetic principle defining the branching of veins in living structures.
- Binghan Zhou
- , Qian Cheng
- & Tawfique Hasan
-
Article
| Open AccessWaveguide-integrated twisted bilayer graphene photodetectors
Silicon-integrated graphene photodetectors exhibit promising bandwidths at telecom wavelengths, but their responsivity is usually limited. Here, the authors report the wafer-scale fabrication of waveguide-integrated detectors based on twisted bilayer graphene, showing responsivities up to 0.65 A/W and 3-dB bandwidths >65 GHz.
- Qinci Wu
- , Jun Qian
- & Hailin Peng
-
Article
| Open AccessStaggered structural dynamic-mediated selective adsorption of H2O/D2O on flexible graphene oxide nanosheets
Graphene oxide is a promising material for molecular separation technologies. Here, the authors propose a realistic staggered stacking structure that plays a crucial role in H/D recognition in water adsorption, as well as high mobilities of water.
- Ryusuke Futamura
- , Taku Iiyama
- & Katsumi Kaneko
-
Article
| Open AccessContinuous and low-carbon production of biomass flash graphene
It is challenging to produce biomass FG continuously due to the lack of an integrated device. Here, we create an integrated automatic system with energy requirement-oriented allocation to achieve continuous biomass FG production with a much lower carbon footprint.
- Xiangdong Zhu
- , Litao Lin
- & Yong-Guan Zhu
-
Article
| Open AccessObservation of Kekulé vortices around hydrogen adatoms in graphene
Kekulé vortices in hexagonal lattices can host fractionalized charges at zero magnetic field, but have remained out of experimental reach. Here, the authors report a Kekulé vortex in the local density states of graphene around a chemisorbed hydrogen adatom.
- Yifei Guan
- , Clement Dutreix
- & Vincent T. Renard
-
Article
| Open AccessHyperbolic metamaterial empowered controllable photonic Weyl nodal line semimetals
One-dimensional photonic crystals provide a platform to modulate Weyl quasiparticles with properties of bound states in the continuum both dynamically (transition and rotation) and topologically (singularities in bilateral drumhead surface states).
- Shengyu Hu
- , Zhiwei Guo
- & Hong Chen
-
Article
| Open AccessTailoring coordination environments of single-atom electrocatalysts for hydrogen evolution by topological heteroatom transfer
The rational design of carbon-supported transition metal single atom catalysts with precise coordination tailoring remains challenging. Here, the authors develop a topological heteroatom-transfer strategy to precisely control the P coordination in Co single atoms for hydrogen evolution.
- Sheng Qian
- , Feng Xu
- & Jingqi Tian
-
Article
| Open AccessLayer-polarized ferromagnetism in rhombohedral multilayer graphene
Rhombohedral multilayer graphene has emerged as an exciting solid-state platform for studying correlated electron physics. Here, the authors demonstrate field-tunable layer-polarized ferromagnetism and isolated surface flat bands engineered with a moiré potential.
- Wenqiang Zhou
- , Jing Ding
- & Shuigang Xu
-
Article
| Open AccessHeight-renderable morphable tactile display enabled by programmable modulation of local stiffness in photothermally active polymer
The controllability of deformation height in reconfigurable touch displays currently limits their deliverable information. Hwang et al. present a light-triggered morphable tactile display enabling generation of refreshable, height-adjustable, and latchable 3D topologies with varying textures on a thin film surface.
- Inwook Hwang
- , Seongcheol Mun
- & Sungryul Yun
-
Article
| Open AccessElectrically driven amplification of terahertz acoustic waves in graphene
Electron–phonon interactions are a crucial aspect of high-quality graphene devices. Here, the authors show that graphene resistivity grows strongly in the direction of the carrier flow when the drift velocity exceeds the speed of sound due to the electrical amplification of acoustic terahertz phonons.
- Aaron H. Barajas-Aguilar
- , Jasen Zion
- & Javier D. Sanchez-Yamagishi
-
Article
| Open AccessHigher order gaps in the renormalized band structure of doubly aligned hBN/bilayer graphene moiré superlattice
In moiré superlattices, a multitude of higher order Bragg gaps and van Hove singularities emerges as the band structure renormalizes. Here, the authors map these gaps uniquely to the recently predicted topological Bragg indices of the underlying supermoiré lattice.
- Mohit Kumar Jat
- , Priya Tiwari
- & Aveek Bid
-
Article
| Open AccessGraphene-integrated mesh electronics with converged multifunctionality for tracking multimodal excitation-contraction dynamics in cardiac microtissues
Tracking electrical and mechanical activity in in-vitro cardiac microtissues is challenging. Here, authors develop tissue-like electronics that can ‘grow’ with the cardiac microtissues and realize the simultaneous tracking of both signals.
- Hongyan Gao
- , Zhien Wang
- & Jun Yao
-
Article
| Open AccessFloat-stacked graphene–PMMA laminate
To maximize composite reinforcing efficiency, a semi-infinite reinforcement should be aligned in the matrix. Here, the authors report a float-stacking strategy for graphene-PMMA laminate with precisely aligned monolayer graphene in a polymer matrix.
- Seung-Il Kim
- , Ji-Yun Moon
- & Jae-Hyun Lee
-
Article
| Open AccessElectron/infrared-phonon coupling in ABC trilayer graphene
Via Raman and infrared spectroscopy measurements, X. Zan et al. find that rhombohedral ABC trilayer graphene has stronger electron/infrared-phonon coupling than Bernal ABA trilayer graphene.
- Xiaozhou Zan
- , Xiangdong Guo
- & Guangyu Zhang
-
Article
| Open AccessTransient chemical and structural changes in graphene oxide during ripening
Graphene oxide is in demand for various applications - however, this is complicated by changing physicochemical properties over time. Here, the authors show the intrinsic, metastable, and transient states of graphene oxide colloids upon ripening.
- Hayato Otsuka
- , Koki Urita
- & Katsumi Kaneko
-
Article
| Open AccessFunctional nanoporous graphene superlattice
Here, the authors report the synthesis and characterization of doped nanoporous graphene superlattices, showing their improved properties for electromagnetic shielding, energy harvesting, optoelectronic and thermoelectric applications.
- Hualiang Lv
- , Yuxing Yao
- & Xiaoguang Wang
-
Article
| Open AccessSynergistic-potential engineering enables high-efficiency graphene photodetectors for near- to mid-infrared light
The integration of 2D materials with metasurfaces can enhance their quantum efficiency, but the approach is usually limited to a narrow spectral band. Here, the authors report the realization of gate-tunable graphene photodetectors combined with all-dielectric periodic slits, leading to enhanced photoresponse in the short-to-long-wave infrared.
- Hao Jiang
- , Jintao Fu
- & Cheng-Wei Qiu
-
Article
| Open AccessExperimentally validated design principles of heteroatom-doped-graphene-supported calcium single-atom materials for non-dissociative chemisorption solid-state hydrogen storage
Via the first-principles calculations and experimental verifications, a guiding principle is established to design heteroatom-doped-graphene-supported Ca single-atom carbon nanomaterials for efficient non-dissociative solid-state hydrogen storage.
- Yong Gao
- , Zhenglong Li
- & Hongge Pan
-
Article
| Open AccessAlkali metal bilayer intercalation in graphene
Here, the authors report a study of the structural properties of intercalated alkali metals in bilayer graphene and graphite via low-voltage scanning transmission electron microscopy, providing mechanistic insights for the development of energy storage applications.
- Yung-Chang Lin
- , Rika Matsumoto
- & Kazu Suenaga
-
Article
| Open AccessBidirectionally promoting assembly order for ultrastiff and highly thermally conductive graphene fibres
Aligned 2D assembled fibres have been developed by drawing like 1D polymers, yet with disorders in cross-section. Here, the authors bidirectionally promote assembly order of graphene fibres, achieving high modulus and highly thermal conductivity.
- Peng Li
- , Ziqiu Wang
- & Chao Gao