Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/60881

Download PDF (Published version) (Adobe Acrobat PDF, -1 bytes)

Title

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

Author(s)

Zijlstra, Peter;  Chon, James W. M.;  Gu, Min

Abstract

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.

Publication type

Journal article

Research centre

Swinburne University of Technology. Faculty of Engineering and Industrial Sciences. Centre for Micro-Photonics

Source

Physical Chemistry Chemical Physics, Vol. 11, no. 28 (Jul 2009), pp. 5915-5921

Publication year

2009

FOR Code(s)

0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics;  0306 Physical Chemistry (Incl. Structural);  0307 Theoretical and Computational Chemistry

Keyword(s)

Electron microscopy;  Gold nanorods;  Melting energy;  Metal nanoparticles;  Photothermal therapy;  White-light scattering spectroscopy

Publisher

Royal Society of Chemistry

ISSN

1463-9076

Publisher URL

http://dx.doi.org/10.1039/b905203h

Copyright

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). Published version of the paper reproduced here 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.

Full text

Peer reviewed