Excitation of nanoscale vapor bubbles at the surface of gold nanoparticles in water
- 8 May 2006
- journal article
- research article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 124 (18), 184702
- https://doi.org/10.1063/1.2187476
Abstract
Intense nonequilibrium femtosecond laser excitation of goldnanoparticles in water leads to a transient heating of the nanoparticles, which decays via heat transfer to the water phase. It is shown that the water temperature rises to near the critical temperature and the water undergoes an explosive evaporation in the subnanosecond range. The formation of vapor bubbles shows a threshold dependence on laser fluence. The nascent nanoscale vapor bubbles change the heat dissipation drastically. The nanoscale structure is resolved directly with a combination of x-ray scattering methods sensitive to the particle lattice expansion and the change in the water structure factor.This publication has 32 references indexed in Scilit:
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