Coherent Acoustic Vibration of Metal Nanoshells

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 t...

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Veröffentlicht in:	Nano letters 2007-01, Vol.7 (1), p.138-142
Hauptverfasser:	Guillon, C, Langot, P, Del Fatti, N, Vallée, F, Kirakosyan, A. S, Shahbazyan, T. V, Cardinal, T, Treguer, M
Format:	Artikel
Sprache:	eng
Schlagworte:	Acoustics Chemical Sciences Condensed Matter Material chemistry Materials Science Mesoscopic Systems and Quantum Hall Effect Metals - chemistry Nanostructures Physics Vibration
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creator	Guillon, C Langot, P Del Fatti, N Vallée, F Kirakosyan, A. S Shahbazyan, T. V Cardinal, T Treguer, M
description	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.
doi_str_mv	10.1021/nl062380d
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subjects	Acoustics Chemical Sciences Condensed Matter Material chemistry Materials Science Mesoscopic Systems and Quantum Hall Effect Metals - chemistry Nanostructures Physics Vibration
title	Coherent Acoustic Vibration of Metal Nanoshells
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