期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 113, 期 6, 页码 2200-2204出版社
AMER CHEMICAL SOC
DOI: 10.1021/jp810433e
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资金
- BMBF [0312029]
We create rod-shaped single crystalline gold-copper (AuxCu(1-x)) nanoparticles and verify the presence of copper in the particles with various direct and indirect optical and electron microscopy techniques. The particles grow from small, preformed gold seeds in a growth solution containing both copper and gold ions in the presence of a surfactant and a mild reducing agent. The presence of copper in the growth solution has a pronounced effect on the spectral characteristic of the resulting nanocrystals and reduces the total volume of the resulting particles. In contrast to spherical copper particles, our rod-shaped nanocrystals show a strong plasmon resonance and the copper content varies the plasmon resonance frequency and the plasmonic line-width. Optical single particle plasmon-line-width observations suggest reduced plasmon damping at specific copper contents corresponding to stoichiometric particle compositions.
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