Affiliation:
1. State Key Laboratory of Multiphase Flow in Power Engineering Frontier Institute of Science and Technology Xi'an Jiaotong University Xi'an Shaanxi 710054 China
2. Institute of Functional Nano & Soft Materials (FUNSOM) Jiangsu Key Laboratory for Carbon‐Based Functional Materials & Devices Joint International Research Laboratory of Carbon‐Based Functional Materials and Devices Soochow University Suzhou Jiangsu 215123 China
Abstract
AbstractAlthough noble metal nanocrystals have been studied extensively in the past decades, the shape‐controlled synthesis of non‐noble metal nanocrystals has remained challenging with limited success, which is a grand obstacle to their wide applications. Herein, a novel lattice mismatch–involved shape‐control mechanism of Cu nanocrystals in a seed‐mediated synthesis is reported, which can produce Cu nanoplates in high yield with tailored sizes (28–130 nm), holding great potential in optical and catalytic applications. The lattice mismatch between Cu and the seed is found effective in inducing crystallographic defects for symmetry breaking toward anisotropic nanocrystals. While a too‐large lattice mismatch (11.7% for Au seeds) leads to multiple twin defects to form quasi‐spherical Cu nanocrystals, an appropriately large lattice mismatch (7.7% for Pt and 6.9% for Pd seeds) successfully induces planar defects for the formation of Cu nanoplates. The size of the Cu nanoplates is customizable by controlling the concentration of the seeds, leading to tunable optical properties. A prototype of a colorimetric indicator with Cu nanoplates, potentially applicable to the safety control of foods and drugs is demonstrated. This mechanism paves a new way for the shape‐controlled synthesis of Cu and other metal nanocrystals for a broad range of applications.
Funder
Key Research and Development Projects of Shaanxi Province
Fundamental Research Funds for the Central Universities
China Postdoctoral Science Foundation
Priority Academic Program Development of Jiangsu Higher Education Institutions
Higher Education Discipline Innovation Project
Natural Science Foundation of Jiangsu Province
Natural Science Basic Research Program of Shaanxi Province
Postdoctoral Research Foundation of China
National Natural Science Foundation of China
Subject
Biomaterials,Biotechnology,General Materials Science,General Chemistry
Cited by
2 articles.
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