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White light scattering spectroscopy and electron microscopy of laser induced melting in single gold nanorods

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posted on 2024-07-09, 19:00 authored by Peter Zijlstra, James ChonJames Chon, Min Gu
We present the first measurements of laser induced melting and reshaping of single gold nanorods. Using a combination of white light scattering spectroscopy and electron microscopy we find a melting energy of 260 fJ for nanorods with an average size of 92 x 30 nm. Contrary to previous reports on ensembles of nanorods, this melting energy corresponds well to the theoretical prediction of 225 fJ. We observe a gradual shape change from a long and thin rod to a shorter and wider rod, which eventually collapses into a sphere when enough laser energy is deposited. We also observe that higher aspect ratio particles are thermodynamically less stable, leading to a greater reduction of the aspect ratio at lower laser pulse energy densities.

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ISSN

1463-9076

Journal title

Physical Chemistry Chemical Physics

Volume

11

Issue

28

Pagination

5915-5921

Publisher

Royal Society of Chemistry

Copyright statement

Copyright © 2009 The Royal Society of Chemistry. The authors give the Royal Society of Chemistry the exclusive right and licence throughout the world to edit, adapt, translate, reproduce and publish the Paper in all formats, in all media and by all means (whether now existing or in future devised). The published version is reproduced for non-commercial purposes only in accordance with the copyright policy of the publisher. This paper is made available for personal use only; no further reuse is permitted.

Language

eng

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