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| Open AccessObservation of 2D-magnesium-intercalated gallium nitride superlattices
The spontaneous formation of magnesium-intercalated gallium nitride superlattices by the interstitial intercalation of two-dimensional magnesium results in considerable compressive strain perpendicular to the layers, leading to enhanced hole transport.
- Jia Wang
- , Wentao Cai
- & Hiroshi Amano
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Article
| Open AccessVan der Waals polarity-engineered 3D integration of 2D complementary logic
We develop a method for high-density vertical stacking of active-device multi-layers, implementing memory and logic functions, using unique VIP-FETs where a van der Waals intercalation layer modulates the p- or n-type nature of the FETs.
- Yimeng Guo
- , Jiangxu Li
- & Zheng Han
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Article |
Nano-achiral complex composites for extreme polarization optics
Multilayer composites of 2D nanomaterials manufactured using a layer-by-layer methodology demonstrates strong polarization rotation, mechanical robustness and operational temperatures as high as 250 °C, despite being nano-achiral and partially disordered.
- Jun Lu
- , Wenbing Wu
- & Nicholas A. Kotov
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Article |
Suppressed thermal transport in silicon nanoribbons by inhomogeneous strain
We report on a method for inducing uncontaminated and precise inhomogeneous strain in nanoscale silicon ribbons and its use for determining physical effects in these strained materials, in particular, an increase in the range and control of thermal conductivity.
- Lin Yang
- , Shengying Yue
- & Peng Gao
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Article |
Elastic films of single-crystal two-dimensional covalent organic frameworks
- Yonghang Yang
- , Baokun Liang
- & Zhikun Zheng
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Article |
All-optical subcycle microscopy on atomic length scales
All-optical subcycle microscopy is achieved on atomic length scales, with picometric spatial and femtosecond temporal resolution.
- T. Siday
- , J. Hayes
- & R. Huber
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Article |
Long-range order enabled stability in quantum dot light-emitting diodes
Improving the long-range order of the quantum dots in perovskite LEDs can markedly enhance their operational stability.
- Ya-Kun Wang
- , Haoyue Wan
- & Liang-Sheng Liao
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Article |
Bevel-edge epitaxy of ferroelectric rhombohedral boron nitride single crystal
Centimetre-sized single-crystal rhombohedral boron nitride layers are achieved through bevel-edge epitaxy, and the resulting material exhibits robust, homogeneous and switchable ferroelectricity with a high Curie temperature.
- Li Wang
- , Jiajie Qi
- & Xuedong Bai
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Article |
Growth of diamond in liquid metal at 1 atm pressure
Diamond crystals and polycrystalline diamond films can be grown using liquid metal at standard pressure and high temperature instead of conventional high pressure and high temperature.
- Yan Gong
- , Da Luo
- & Rodney S. Ruoff
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News & Views |
Nanoparticle fix opens up tricky technique to forensic applications
A technique called surface-enhanced Raman spectroscopy can detect tiny quantities of compounds in solution, but has been difficult to use for quantitative analysis. A digital approach involving nanoparticles suggests a way forward.
- Peter J. Vikesland
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Article |
Giant energy storage and power density negative capacitance superlattices
Using a three-pronged approach — spanning field-driven negative capacitance stabilization to increase intrinsic energy storage, antiferroelectric superlattice engineering to increase total energy storage, and conformal three-dimensional deposition to increase areal energy storage density — very high electrostatic energy storage density and power density are reported in HfO2–ZrO2-based thin film microcapacitors integrated into silicon.
- Suraj S. Cheema
- , Nirmaan Shanker
- & Sayeef Salahuddin
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Article |
Metal telluride nanosheets by scalable solid lithiation and exfoliation
Fast and scalable synthesis of a variety of transition metal telluride nanosheets by solid lithiation and hydrolysis is demonstrated and several interesting quantum phenomena were observed, such as quantum oscillations and giant magnetoresistance.
- Liangzhu Zhang
- , Zixuan Yang
- & Hui-Ming Cheng
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Article |
Phase-change memory via a phase-changeable self-confined nano-filament
We present a device that can reduce the phase-change memory reset current while maintaining a high on/off ratio, fast speed and small variations, representing advances for neuromorphic computing systems.
- See-On Park
- , Seokman Hong
- & Shinhyun Choi
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Article |
Graphene nanoribbons grown in hBN stacks for high-performance electronics
A strategy for the transfer-free direct growth of ultralong, high-quality graphene nanoribbons, which have desirable electronic properties, between layers of a boron nitride insulator is reported.
- Bosai Lyu
- , Jiajun Chen
- & Zhiwen Shi
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Article |
Dual quantum spin Hall insulator by density-tuned correlations in TaIrTe4
A study reports a dual quantum spin Hall insulator in monolayer TaIrTe4, arising from the interplay of its single-particle topology and density-tuned electron correlations.
- Jian Tang
- , Thomas Siyuan Ding
- & Qiong Ma
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Article
| Open AccessBlueprinting extendable nanomaterials with standardized protein blocks
A study describes an approach using designed building blocks that are far more regular in geometry than natural proteins to construct modular multicomponent protein assemblies.
- Timothy F. Huddy
- , Yang Hsia
- & David Baker
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Article |
High-speed and large-scale intrinsically stretchable integrated circuits
High-density, intrinsically stretchable transistors with high driving ability and integrated circuits with high operation speed and large-scale integration were enabled by a combination of innovations in materials, fabrication process design, device engineering and circuit design.
- Donglai Zhong
- , Can Wu
- & Zhenan Bao
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News |
Landmark study links microplastics to serious health problems
People who had tiny plastic particles lodged in a key blood vessel were more likely to experience heart attack, stroke or death during a three-year study.
- Max Kozlov
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Article |
Fractional quantum anomalous Hall effect in multilayer graphene
Integer and fractional quantum anomalous Hall effects in a rhombohedral pentalayer graphene–hBN moiré superlattice are observed, providing an ideal platform for exploring charge fractionalization and (non-Abelian) anyonic braiding at zero magnetic field.
- Zhengguang Lu
- , Tonghang Han
- & Long Ju
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Article
| Open AccessDirective giant upconversion by supercritical bound states in the continuum
An experimental design consisting of a photonic-crystal nanoslab covered with upconversion nanoparticles demonstrates the phenomenon of supercritical coupling, resulting in giant enhancement of upconversion by photonic bound states in the continuum.
- Chiara Schiattarella
- , Silvia Romano
- & Gianluigi Zito
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Article
| Open AccessA 2D ferroelectric vortex pattern in twisted BaTiO3 freestanding layers
The stacking of freestanding ferroelectric perovskite layers with controlled twist angles results in a peculiar pattern of polarization vortices and antivortices that emerges from the flexoelectric coupling of polarization to strain gradients.
- G. Sánchez-Santolino
- , V. Rouco
- & J. Santamaria
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Article
| Open AccessLight-driven nanoscale vectorial currents
Vectorial optoelectronic metasurfaces are described, showing that light pulses can be used to drive and direct local charge flows around symmetry-broken plasmonic nanostructures, leading to tunable responses in terahertz emission.
- Jacob Pettine
- , Prashant Padmanabhan
- & Hou-Tong Chen
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Article
| Open AccessSingle-photon superradiance in individual caesium lead halide quantum dots
Excitonic single-photon superradiance is reported in individual perovskite quantum dots with a sub-100 ps radiative decay time, almost as short as the reported exciton coherence time.
- Chenglian Zhu
- , Simon C. Boehme
- & Gabriele Rainò
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Article |
Tuning commensurability in twisted van der Waals bilayers
Using valley-resolved scanning tunnelling spectroscopy, twisted WSe2 bilayers are studied, including incommensurate dodecagon quasicrystals at 30° and commensurate moiré crystals at 21.8° and 38.2°.
- Yanxing Li
- , Fan Zhang
- & Chih-Kang Shih
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Article |
Two-dimensional heavy fermions in the van der Waals metal CeSiI
We present comprehensive thermodynamic and spectroscopic evidence for an antiferromagnetically ordered heavy-fermion ground state in the van der Waals metal CeSiI.
- Victoria A. Posey
- , Simon Turkel
- & Xavier Roy
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Article |
Three-dimensional integration of two-dimensional field-effect transistors
Monolithic three-dimensional integration of two-dimensional field-effect transistors enables improved integration density and multifunctionality to realize ‘More Moore’ and ‘More than Moore’ technologies.
- Darsith Jayachandran
- , Rahul Pendurthi
- & Saptarshi Das
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Article |
Structural transition and migration of incoherent twin boundary in diamond
We report atomic observations of six incoherent twin boundary configurations and structural transitions in diamond at room temperature, showing a dislocation-mediated mechanism different from metallic systems and shedding new light on grain boundary behaviour.
- Ke Tong
- , Xiang Zhang
- & Yongjun Tian
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Research Briefing |
Atomic electron tomography reveals chemical order in medium- and high-entropy alloys
Medium- and high-entropy alloys are hugely promising materials in metallurgy and catalysis, but their atomic-scale structure — and how that relates to their properties — is not well understood. A powerful method is beginning to reveal their secrets, with hopes for engineering better materials in the future.
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Moiré synaptic transistor with room-temperature neuromorphic functionality
We report the experimental realization and room-temperature operation of a low-power (20 pW) moiré synaptic transistor based on an asymmetric bilayer graphene/hexagonal boron nitride moiré heterostructure.
- Xiaodong Yan
- , Zhiren Zheng
- & Mark C. Hersam
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Article |
Three-dimensional atomic structure and local chemical order of medium- and high-entropy nanoalloys
Atomic electron tomography is used to determine the 3D atomic positions and chemical species of medium- and high-entropy alloy nanoparticles and quantitatively characterize the local lattice distortion, strain tensor, twin boundaries, dislocation cores and chemical short-range order.
- Saman Moniri
- , Yao Yang
- & Jianwei Miao
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Article
| Open AccessDesigner phospholipid capping ligands for soft metal halide nanocrystals
Phospholipids enhance the structural and colloidal integrity of hybrid organic–inorganic lead halide perovskites and lead-free metal halide nanocrystals, which then exhibit enhanced robustness and optical properties.
- Viktoriia Morad
- , Andriy Stelmakh
- & Maksym V. Kovalenko
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Article |
Cascaded compression of size distribution of nanopores in monolayer graphene
Cascaded compression, in which nanopores are compressed by cycles of shrinkage and expansion, is described, leading tohigh-density nanopores in monolayer graphene with a narrow pore-size distribution, left skewness and ultrasmall tail deviation.
- Jiangtao Wang
- , Chi Cheng
- & Jing Kong
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Article |
Evidence for chiral supercurrent in quantum Hall Josephson junctions
Ultra-narrow quantum Hall Josephson junctions defined in encapsulated graphene nanoribbons exhibit a chiral supercurrent, visible up to 8 T.
- Hadrien Vignaud
- , David Perconte
- & Benjamin Sacépé
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Article
| Open AccessHopfion rings in a cubic chiral magnet
Transmission electron microscopy is used to observe three-dimensional topological solitons known as hopfions that in a chiral magnet are found to form rings around skyrmion strings, and a nucleation protocol for these rings is provided.
- Fengshan Zheng
- , Nikolai S. Kiselev
- & Rafal E. Dunin-Borkowski
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Research Briefing |
Divide and conquer: exploiting entropy to grow nanoscale barrier materials
The full promise of materials structured at the nanoscale can be realized only if they can be manufactured more efficiently and at the sizes required for device integration. An innovative method takes advantage of thermodynamic and kinetic effects to control the growth of stacked 2D nanosheets that can be used for practical applications from the nanoscale to the macroscale.
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Dynamic diagnosis of metamaterials through laser-induced vibrational signatures
A high-throughput, non-contact framework is described that uses the laser-induced vibrational signatures of metamaterials to non-destructively quantify their omnidirectional elastic information, dynamic linear properties, damping properties and defects.
- Yun Kai
- , Somayajulu Dhulipala
- & Carlos M. Portela
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Article |
Functional composites by programming entropy-driven nanosheet growth
Following a micro-then-nano growth sequence to fabricate composites that are blends of block-copolymer-based supramolecules, small molecules and nanoparticles shows that high-performance barrier materials can be manufactured by means of entropy-driven assembly.
- Emma Vargo
- , Le Ma
- & Ting Xu
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Article |
Remarkable heat conduction mediated by non-equilibrium phonon polaritons
Measurements of thermal transport along 3C-SiC nanowires with and without a gold coating on the end(s) suggest that thermally excited surface phonon polaritons can be used in nanostructures to substantially enhance thermal conductivity.
- Zhiliang Pan
- , Guanyu Lu
- & Deyu Li
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Article |
Phase-dependent growth of Pt on MoS2 for highly efficient H2 evolution
We report the production of MoS2 nanosheets with high phase purity, showing that the 2H-phase templates facilitate epitaxial growth of Pt nanoparticles, whereas the 1T′ phase supports single-atomically dispersed Pt atoms.
- Zhenyu Shi
- , Xiao Zhang
- & Hua Zhang
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Article |
Stack growth of wafer-scale van der Waals superconductor heterostructures
Stacks of van der Waals superconductor heterostructures comprising many layers and several blocks of two-dimensional materials have been grown in a highly controllable manner at a wafer scale using a high-to-low temperature strategy.
- Zhenjia Zhou
- , Fuchen Hou
- & Libo Gao
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Article |
Spin-mediated shear oscillators in a van der Waals antiferromagnet
Using several ultrafast diffraction and microscopy techniques, demagnetization-driven interlayer shear of a van der Waals antiferromagnet is visualized at the nanoscale.
- Alfred Zong
- , Qi Zhang
- & Haidan Wen
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Matters Arising |
Dilemma in optical identification of single-layer multiferroics
- Yucheng Jiang
- , Yangliu Wu
- & Cheng-Wei Qiu
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Article |
Autonomous healing of fatigue cracks via cold welding
We report that fatigue cracks in pure metals can undergo intrinsic self-healing; they were observed to heal by crack flank cold welding induced by local stress state and grain boundary migration.
- Christopher M. Barr
- , Ta Duong
- & Brad L. Boyce
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Article |
Superconductivity and strong interactions in a tunable moiré quasicrystal
A moiré quasicrystal constructed by twisting three layers of graphene with two different twist angles shows high tunability between a periodic-like regime at low energies and a strongly quasiperiodic regime at higher energies alongside strong interactions and superconductivity.
- Aviram Uri
- , Sergio C. de la Barrera
- & Pablo Jarillo-Herrero
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Article |
Harnessing a paper-folding mechanism for reconfigurable DNA origami
A method is presented to harness the paper-folding mechanism of reconfigurable macroscale systems to create reconfigurable DNA origami structures, in anticipation that it will advance the development of complex molecular systems.
- Myoungseok Kim
- , Chanseok Lee
- & Do-Nyun Kim
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Article |
Pair density wave state in a monolayer high-Tc iron-based superconductor
The primary pair density wave state has been discovered in a monolayer iron-based high-Tc superconductor, providing a platform to study the interplay between the correlated electronic states and unconventional Cooper pairing in high-Tc superconductors.
- Yanzhao Liu
- , Tianheng Wei
- & Jian Wang
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Research Briefing |
Nanoparticles containing diverse elements made using liquid metal
The synthesis of high-entropy alloy nanoparticles (HEA-NPs) — small particles each containing multiple principal metal elements — typically requires extreme conditions to ensure adequate mixing of constituents. Innovative experiments show that the liquid metal can act as a mixing reservoir to facilitate the synthesis of a diverse range of such nanoparticles in mild conditions.
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Article |
Liquid metal for high-entropy alloy nanoparticles synthesis
We discovered that liquid metal endowing negative mixing enthalpy with other elements could provide a stable thermodynamic condition and act as a desirable dynamic mixing reservoir, realizing the synthesis of high-entropy alloy nanoparticles.
- Guanghui Cao
- , Jingjing Liang
- & Lei Fu
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Article |
Organic–inorganic covalent–ionic molecules for elastic ceramic plastic
Covalent organic molecules can be combined with ionic inorganic molecules to create a hybrid material demonstrating paradoxical mechanical properties in a bottom-up manner, enabling the manufacture of an ‘elastic ceramic plastic’.
- Weifeng Fang
- , Zhao Mu
- & Zhaoming Liu
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