期刊
ACS NANO
卷 4, 期 12, 页码 7676-7682出版社
AMER CHEMICAL SOC
DOI: 10.1021/nn102495f
关键词
nanorings; nanoring arrays; on-wire lithography; galvanic replacement reaction; surface-enhanced Raman scattering
类别
资金
- DoD
- NSF NSEC [EEC-0647560]
- DOE Office via NU Non-equilibrium Energy Research Center [DE-SC0000989]
- AFOSR
- EDB in Singapore
- NSEC
This paper describes a new strategy for synthesizing free-standing bimetallic nanorings and nanoring arrays based upon on-wire lithography and a galvanic replacement reaction. The strategy allows one to tune the diameter, length, and therefore aspect ratio of the nanorings. In addition, it can be used to produce arrays of nanorings in high yield with control over number and spacing. Spectroscopic studies and discrete dipole approximation calculations show that nanoring dimers exhibit greater surface enhanced Raman scattering than the analogous nanodisk dimers.
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