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Updated: Jul 17, 2026

Controllable Nucleation of Cavitation from Plasmonic Gold Nanoparticles for Enhancing High Intensity Focused Ultrasound Applications
Published on: October 5, 2018
Coherent acoustic vibration of metal nanoshells
C Guillon1, P Langot, N Del Fatti
1Centre de Physique Moléculaire Optique et Hertzienne CNRS and Université Bordeaux I, 351 cours de la Libération, 33405 Talence, France.
Abstract:
Using time-resolved pump-probe spectroscopy, we have performed the first investigation of the vibrational modes of gold nanoshells. The fundamental isotropic mode launched by a femtosecond pump pulse manifests itself in a pronounced time-domain modulation of the differential transmission probed at the frequency of nanoshell surface plasmon resonance. The modulation amplitude is significantly stronger, and the period is longer than that in a gold nanoparticle of the same overall size, in agreement with theoretical calculations. This distinct acoustical signature of nanoshells provides a new and efficient method for identifying these versatile nanostructures and for studying their mechanical and structural properties.
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