期刊
LANGMUIR
卷 24, 期 18, 页码 10407-10413出版社
AMER CHEMICAL SOC
DOI: 10.1021/la800961j
关键词
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资金
- National Natural Science Foundation of China [NSFC 20773045, 20627002, 20573041]
- National Institute of Justice [2006-DN-BX-K034]
- City University Collaborative Incentive program [80209]
- National Science Foundation [RII-9353488, CHE-0091362, CHE-0345987, ECS0217646]
- City University of New York PSC-BHE Faculty Research Award Program
Silver nanocrystals with tetrahedral shapes and {111} faces have been synthesized by the light-driven growth method in an aqueous solution. The nanocrystals of T-d symmetry were formed under the effect of tartrate and citrate as the structural-directing reagents at the appropriate stages of reaction. Further, the nanocrystals may be assembled through electrostatic interaction to develop large-scale particle surfaces with sharp vertexes, which can generate strong localized electromagnetic field for surface-enhanced Raman scattering (SERS) studies. Benzenethiol was used as the probe to evaluate their SERS enhancement, and enhancement factors of up to 106 are reached. As a kind of promising material, these novel nanocrystals will be applied in surface enhanced spectroscopy and plasmonics field.
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