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Issue 7, 2006

On the temperature stability of gold nanorods: comparison between thermal and ultrafast laser-induced heating

Author affiliations

Abstract

The response of gold nanorods to both thermal and ultrafast laser-induced heating has been examined. The thermal heating experiments show structural changes that occur on timescales ranging from hours to days. At the highest temperature examined (250 °C) the nanorods are transformed into spheres within an hour. On the other hand, no structural changes are observed in the laser-induced heating experiments up to temperatures of 700 ± 50 °C. This is attributed to thermal diffusion in the laser experiments. Measurements of the period of the extensional mode of the nanorods using time-resolved spectroscopy show a significant softening at high pump laser powers. However, the decrease in the period is less than expected from bulk Young’s modulus vs. temperature data.

Graphical abstract: On the temperature stability of gold nanorods: comparison between thermal and ultrafast laser-induced heating

Article information


Submitted
17 Oct 2005
Accepted
21 Nov 2005
First published
01 Dec 2005

Phys. Chem. Chem. Phys., 2006,8, 814-821
Article type
Paper

On the temperature stability of gold nanorods: comparison between thermal and ultrafast laser-induced heating

H. Petrova, J. Perez Juste, I. Pastoriza-Santos, G. V. Hartland, L. M. Liz-Marzán and P. Mulvaney, Phys. Chem. Chem. Phys., 2006, 8, 814 DOI: 10.1039/B514644E

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