Ye, S orcid.org/0000-0001-5152-5753, Brown, AP orcid.org/0000-0001-9692-2154, Stammers, AC orcid.org/0000-0002-5277-779X et al. (10 more authors) (2019) Sub‐Nanometer Thick Gold Nanosheets as Highly Efficient Catalysts. Advanced Science, 6 (21). 1900911. ISSN 2198-3844
Abstract
2D metal nanomaterials offer exciting prospects in terms of their properties and functions. However, the ambient aqueous synthesis of atomically‐thin, 2D metallic nanomaterials represents a significant challenge. Herein, freestanding and atomically‐thin gold nanosheets with a thickness of only 0.47 nm (two atomic layers thick) are synthesized via a one‐step aqueous approach at 20 °C, using methyl orange as a confining agent. Owing to the high surface‐area‐to‐volume ratio, abundance of unsaturated atoms exposed on the surface and large interfacial areas arising from their ultrathin 2D nature, the as‐prepared Au nanosheets demonstrate excellent catalysis performance in the model reaction of 4‐nitrophenol reduction, and remarkable peroxidase‐mimicking activity, which enables a highly sensitive colorimetric sensing of H2O2 with a detection limit of 0.11 × 10−6 m. This work represents the first fabrication of freestanding 2D gold with a sub‐nanometer thickness, opens up an innovative pathway toward atomically‐thin metal nanomaterials that can serve as model systems for inspiring fundamental advances in materials science, and holds potential across a wide region of applications.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2019 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. This is an open access article under the terms of the Creative Commons Attribution 4.0 International (CC BY 4.0) (https://creativecommons.org/licenses/by/4.0/), which permits use, distribution and reproduction in any medium, provided the original work is properly cited |
Keywords: | 2D; catalysis; gold nanomaterials; nanoenzymes; sub‐nanometer |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemistry (Leeds) > Organic Chemistry (Leeds) The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Physics and Astronomy (Leeds) > Molecular & Nanoscale Physics The University of Leeds > Faculty of Medicine and Health (Leeds) > School of Dentistry (Leeds) > Oral Biology (Leeds) |
Funding Information: | Funder Grant number EPSRC EP/M028143/1 MRC MR/L01629X/1 EPSRC EP/P023266/1 Wellcome Trust 101497/Z/13/Z EPSRC EP/P024041/1 EPSRC Not Known |
Depositing User: | Symplectic Publications |
Date Deposited: | 08 Aug 2019 15:04 |
Last Modified: | 17 Dec 2024 14:08 |
Status: | Published |
Publisher: | Wiley Open Access |
Identification Number: | 10.1002/advs.201900911 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:149481 |