期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 112, 期 20, 页码 7535-7539出版社
AMER CHEMICAL SOC
DOI: 10.1021/jp801550x
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Single silver nanocubes have been studied by transient absorption spectroscopy. The traces show clear modulations due to coherently excited vibrational modes. The average period measured in the experiments was 18.6 +/- 1.7 ps, which is in excellent agreement with the calculated period for the breathing mode of the cubes. The distribution of the periods was also in a good agreement with that expected from the size distribution of the sample. The average damping time was 57.6 +/- 7.4 ps, which is approximately 2 times longer than the damping time measured in ensemble studies. There is only a weak correlation between the damping times and the periods. This implies that damping is affected by the particle's local environment and that there is significant heterogeneity in the environment.
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