Excitation of nanoscale vapor bubbles at the surface of gold nanoparticles in water

Journal Article · Sun May 14 00:00:00 EDT 2006 · Journal of Chemical Physics

DOI:https://doi.org/10.1063/1.2187476· OSTI ID:20783279

Kotaidis, V; Dahmen, C; Plessen, G von; Springer, F; Plech, A ^[1]

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1. Fachbereich Physik der Universitaet Konstanz, Universitaetsstrasse 10, D-78457 Constance (Germany)

Intense nonequilibrium femtosecond laser excitation of gold nanoparticles 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.

• OSTI ID: 20783279
• Journal Information: Journal of Chemical Physics, Vol. 124, Issue 18; Other Information: DOI: 10.1063/1.2187476; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
36 MATERIALS SCIENCE
BUBBLES
COLLISIONS
CRITICAL TEMPERATURE
EVAPORATION
EXCITATION
GOLD
NANOSTRUCTURES
PARTICLES
STRUCTURE FACTORS
VAPORS
WATER
X-RAY DIFFRACTION