期刊
NANO LETTERS
卷 12, 期 9, 页码 4647-4650出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl301937j
关键词
Noble metal nanoparticles; plasmon resonance; colloidal chemistry; nano/microfluidics; gold nanorods; plasmonic heating
类别
资金
- European Research Council (ERC)
- Deutsche Forschungsgemeinschft (DFG) through the Nano-systems Initiative Munich (NIM)
- Humboldt Foundation
Surface-chemistry of individual, optically trapped plasmonic nanoparticles is modified and accelerated by plasmonic overheating. Depending on the optical trapping power, gold nanorods can exhibit red shifts of their plasmon resonance (i.e., increasing aspect ratio) under oxidative conditions. In contrast, in bulk exclusively blue shifts (decreasing aspect ratios) are observed. Supported by calculations, we explain this finding by local temperatures in the trap exceeding the boiling point of the solvent that cannot be achieved in bulk.
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