A surface phase transition of supported gold nanoparticles.
basic_science · Level V
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- Record sourced from PubMed, PMID 17352505.
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Abstract
A thermal phase transition has been resolved in gold nanoparticles supported on a surface. By use of asynchronous optical sampling with coupled femtosecond oscillators, the Lamb vibrational modes could be resolved as a function of annealing temperature. At a temperature of 104 degrees C the damping rate and phase changes abruptly, indicating a structural transition in the particle, which is explained as the onset of surface melting.
Medical subject headings
- Crystallization
- Gold
- Nanostructures
- Nanotechnology