4,195 results match your criteria: "Nature nanotechnology[Journal]"

The challenge of studying interfaces in battery materials.

Nat Nanotechnol

December 2024

Université Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, Grenoble INP, LEPMI, Grenoble, France.

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Vacancy-rich β-LiN solid-state electrolyte.

Nat Nanotechnol

December 2024

State Key Laboratory of Materials Processing and Die and Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei, China.

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Colloidal quantum dots (CQDs) are promising for infrared photodetectors with high detectivity and low-cost production. Although CQDs enable photoinduced charge multiplication, thermal noise in low-bandgap materials limits their performance in IR detectors. Here we present a pioneering architecture of a CQD-based infrared photodetector that uses kinetically pumped avalanche multiplication.

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The advancement of high-performance fast-charging materials has significantly propelled progress in electrochemical capacitors (ECs). Electrochemical capacitors store charges at the nanoscale electrode material-electrolyte interface, where the charge storage and transport mechanisms are mediated by factors such as nanoconfinement, local electrode structure, surface properties and non-electrostatic ion-electrode interactions. This Review offers a comprehensive exploration of probing the confined electrochemical interface using advanced characterization techniques.

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AI-nano-driven surface-enhanced Raman spectroscopy for marketable technologies.

Nat Nanotechnol

December 2024

School of Electronic Science and Engineering, State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, IKKEM, Xiamen University, Xiamen, China.

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Atomically intimate assembly of dual metal-oxide interfaces for tandem conversion of syngas to ethanol.

Nat Nanotechnol

November 2024

Key Laboratory of Precision and Intelligent Chemistry, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, China.

Selective conversion of syngas to value-added higher alcohols (containing two or more carbon atoms), particularly to a specific alcohol, is of great interest but remains challenging. Here we show that atomically intimate assembly of FeO-Rh-ZrO dual interfaces by selectively architecting highly dispersed FeO on ultrafine raft-like Rh clusters supported on tetragonal zirconia enables highly efficient tandem conversion of syngas to ethanol. The ethanol selectivity in oxygenates reached ~90% at CO conversion up to 51%, along with a markedly high space-time yield of ethanol of 668.

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The advancement of all-solid-state lithium metal batteries requires breakthroughs in solid-state electrolytes (SSEs) for the suppression of lithium dendrite growth at high current densities and high capacities (>3 mAh cm) and innovation of SSEs in terms of crystal structure, ionic conductivity and rigidness. Here we report a superionic conducting, highly lithium-compatible and air-stable vacancy-rich β-LiN SSE. This vacancy-rich β-LiN SSE shows a high ionic conductivity of 2.

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A cascade X-ray energy converting approach toward radio-afterglow cancer theranostics.

Nat Nanotechnol

November 2024

School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, Singapore, Singapore.

Leveraging X-rays to initiate prolonged luminescence (radio-afterglow) and stimulate radiodynamic O production from optical agents provides opportunities for diagnosis and therapy at tissue depths inaccessible to light. However, X-ray-responsive organic luminescent materials are rare due to their intrinsic low X-ray conversion efficiency. Here we report a cascade X-ray energy converting approach to develop organic radio-afterglow nanoprobes (RANPs) for cancer theranostics.

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Layer-dependent evolution of electronic structures and correlations in rhombohedral multilayer graphene.

Nat Nanotechnol

November 2024

Key Laboratory for Micro/Nano Optoelectronic Devices of Ministry of Education and Hunan Provincial Key Laboratory of Low-Dimensional Structural Physics and Devices, School of Physics and Electronics, Hunan University, Changsha, China.

Article Synopsis
  • Recent research on trilayer rhombohedral graphene (RG) reveals its potential for studying strong correlation electronic phenomena due to observed superconductivity and magnetism.
  • The study uncovers layer-dependent electronic structures in RG multilayers ranging from 3 to 9 layers, highlighting enhanced low-energy flat bands and varying interlayer interactions at liquid nitrogen temperatures.
  • Findings show significant splittings of these flat bands, indicating the emergence of strongly correlated states, with the strongest correlations found in six-layer RG, validating theoretical predictions and suggesting RG as a promising platform for further research.
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Fully integrated multi-mode optoelectronic memristor array for diversified in-sensor computing.

Nat Nanotechnol

November 2024

School of Integrated Circuits, Beijing Innovation Center for Integrated Circuits, Tsinghua University, Beijing, China.

In-sensor computing, which integrates sensing, memory and processing functions, has shown substantial potential in artificial vision systems. However, large-scale monolithic integration of in-sensor computing based on emerging devices with complementary metal-oxide-semiconductor (CMOS) circuits remains challenging, lacking functional demonstrations at the hardware level. Here we report a fully integrated 1-kb array with 128 × 8 one-transistor one-optoelectronic memristor (OEM) cells and silicon CMOS circuits, which features configurable multi-mode functionality encompassing three different modes of electronic memristor, dynamic OEM and non-volatile OEM (NV-OEM).

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Full on-device manipulation of olefin metathesis for precise manufacturing.

Nat Nanotechnol

November 2024

Beijing National Laboratory for Molecular Sciences, National Biomedical Imaging Centre, College of Chemistry and Molecular Engineering, Peking University, Beijing, People's Republic of China.

Olefin metathesis, as a powerful metal-catalysed carbon-carbon bond-forming method, has achieved considerable progress in recent years. However, the complexity originating from multicomponent interactions has long impeded a complete mechanistic understanding of olefin metathesis, which hampers further optimization of the reaction. Here, we clarify both productive and hidden degenerate pathways of ring-closing metathesis by focusing on one individual catalyst, using a sensitive single-molecule electrical detection platform.

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Biosensors play key roles in medical research and diagnostics. However, the development of biosensors for new biomolecular targets of interest often involves tedious optimization steps to ensure a high signal response at the analyte concentration of interest. Here we show a modular nanosensor platform that facilitates these steps by offering ways to decouple and independently tune the signal output as well as the response window.

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Targeted intervention in nerve-cancer crosstalk enhances pancreatic cancer chemotherapy.

Nat Nanotechnol

November 2024

National Engineering Research Center for Nanomedicine, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, China.

Article Synopsis
  • * Researchers developed a novel therapy using E. coli-derived outer membrane vesicles with a nerve-binding peptide and a Trk inhibitor to specifically target tumor-associated nerves.
  • * This approach effectively disrupts nerve signaling and alters macrophage behavior, reducing nerve growth and enhancing chemotherapy effectiveness against pancreatic cancer.
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Blue lasers using low-toxicity colloidal quantum dots.

Nat Nanotechnol

November 2024

State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China.

Blue lasers play a pivotal role in laser-based display, printing, manufacturing, data recording and medical technologies. Colloidal quantum dots (QDs) are solution-grown materials with strong, tunable emission covering the whole visible spectrum, but the development of QD lasers has largely relied on Cd-containing red-emitting QDs, with technologically viable blue QD lasers remaining out of reach. Here we report on the realization of tunable and robust lasing using low-toxicity blue-emitting ZnSe-ZnS core-shell QDs that are compact in size yet still feature suppressed Auger recombination and long optical gain lifetime approaching 1 ns.

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The coherent control of interacting spins in semiconductor quantum dots is of strong interest for quantum information processing and for studying quantum magnetism from the bottom up. Here we present a 2 × 4 germanium quantum dot array with full and controllable interactions between nearest-neighbour spins. As a demonstration of the level of control, we define four singlet-triplet qubits in this system and show two-axis single-qubit control of each qubit and SWAP-style two-qubit gates between all neighbouring qubit pairs, yielding average single-qubit gate fidelities of 99.

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Article Synopsis
  • Currently, intravascular optical coherence tomography (IV-OCT) is primarily used for imaging the structure of arterial plaques, but it lacks the ability to detect molecular changes in the endothelium, which could improve risk assessment for cardiovascular issues.
  • Researchers developed gold superclusters (AuSCs) that are designed to enhance IV-OCT by increasing light scattering and targeting specific molecules in the vascular system.
  • In tests with a rat model, these AuSCs successfully enabled molecular imaging of vascular inflammation by correlating the imaging signal with the severity of inflammation, demonstrating potential for earlier detection of cardiovascular risks.
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Self-cleaning electrode for stable synthesis of alkaline-earth metal peroxides.

Nat Nanotechnol

October 2024

Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Advanced Fuel Cells and Electrolyzers Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, China.

Alkaline-earth metal peroxides (MO, M = Ca, Sr, Ba) represent a category of versatile and clean solid oxidizers, while the synthesis process usually consumes excessive hydrogen peroxide (HO). Here we discover that HO synthesized via two-electron electrochemical oxygen reduction (2e ORR) on the electrode surface can be efficiently and durably consumed to produce high-purity MO in an alkaline environment. The crucial factor lies in the in-time detachment of in situ-generated MO from the self-cleaning electrode, where the solid products spontaneously detach from the electrode to solve the block issue.

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Targeted protein degradation via cellular trafficking of nanoparticles.

Nat Nanotechnol

October 2024

Henan-Macquarie University Joint Centre for Biomedical Innovation, School of Life Sciences, Henan University, Kaifeng, China.

Strategies that selectively bind proteins of interest and target them to the intracellular protein recycling machinery for targeted protein degradation have recently emerged as powerful tools for undruggable targets in biomedical research and the pharmaceutical industry. However, targeting any new protein of interest with current degradation tools requires a laborious case-by-case design for different diseases and cell types, especially for extracellular targets. Here we observe that nanoparticles can mediate specific receptor-independent internalization of a bound protein and further develop a general strategy for degradation of extracellular proteins of interest by making full use of clinically approved components.

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