期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 59, 期 2, 页码 943-950出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201913301
关键词
alloys; crystal growth; nanoparticles; plasmon; strain
资金
- Indiana Space Grant Consortium
- Research Foundation Flanders (FWO, Belgium)
- U.S. National Science Foundation [1602476, 1904499]
- Research Corporation for Scientific Advancement
- European Union [731019, 815128]
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [1602476, 1904499] Funding Source: National Science Foundation
Branched plasmonic nanocrystals (NCs) have attracted much attention due to electric field enhancements at their tips. Seeded growth provides routes to NCs with defined branching patterns and, in turn, near-field distributions with defined symmetries. Here, a systematic analysis was undertaken in which seeds containing different distributions of planar defects were used to grow branched NCs in order to understand how their distributions direct the branching. Characterization of the products by multimode electron tomography and analysis of the NC morphologies at different overgrowth stages indicate that the branching patterns are directed by the seed defects, with the emergence of branches from the seed faces consistent with minimizing volumetric strain energy at the expense of surface energy. These results contrast with growth of branched NCs from single-crystalline seeds and provide a new platform for the synthesis of symmetrically branched plasmonic NCs.
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