期刊
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B
卷 28, 期 3, 页码 631-634出版社
A V S AMER INST PHYSICS
DOI: 10.1116/1.3425630
关键词
electron backscattering; etching; gold; grain boundaries; Raman spectroscopy
资金
- Strategic Research Programme
The authors have investigated the structures of gold tips suitable for tip-enhanced Raman spectroscopy (TERS) fabricated by the electrochemical etching technique [C. Williams and D. Roy, J. Vac. Sci. Technol. B 26, 1761 (2008)]. This work attempts to find an answer to why some of the chemically etched tips do not produce TERS signal and suggests possible ways of improving the reproducibility of the enhancement factor by fabricating single-crystal tips. TERS tips with single crystalline tip ends and polycrystalline tip ends were studied by electron-backscattered diffraction. Influences of defects and grain boundaries on surface plasmon resonance energy are invoked to explain why some tips do not produce appreciable TERS signals. (C) 2010 American Vacuum Society. [DOI: 10.1116/1.3425630]
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