Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 14, Issue 19, Pages 6817-6825Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2cp24147a
Keywords
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Funding
- National Natural Science Foundation of China [51002007, 20973019]
- National Basic Research Program of China [2010CB934700]
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We investigated the configuration characteristic and adsorption behavior of 4,4'-thiobisbenzenethiol (TBBT) on the surface of silver nanoparticles (NPs). Under different conditions and preparation processes, several possible surface species were produced including single-end adsorption on a silicon wafer, double-end adsorption and bridge-like adsorption. Although consisting of the same molecule and nano material, different adsorption systems exhibited different spectral characteristics in the surface-enhanced Raman spectroscopy (SERS). A density functional theory (DFT) study further verified the corresponding adsorption states. The combined SERS-DFT study provided a framework towards investigating and designing adsorption systems at a molecular level, indicating the potential use in applications such as nano-sensors.
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