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Issue 23, 2016
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In situ tuning of gold nanorod plasmon through oxidative cyanide etching

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Abstract

Single gold nanorods exhibit great opportunities for bio-sensing, enhanced spectroscopies and photothermal therapy. A key property of these particles is the surface plasmon resonance, that is strongly dependent on their shape. Methods for tuning this resonance after the synthesis of the particles are of great interest for many applications. In this work we show that, through very well known chemistry between gold atoms and cyanide ions, it is possible to tune the surface plasmon of single 25 × 50 nm rods by more than 100 nm towards longer wavelengths. This is achieved by slowly etching gold atoms from the surface of the particles, preserving their specific optical properties.

Graphical abstract: In situ tuning of gold nanorod plasmon through oxidative cyanide etching

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Supplementary files

Article information


Submitted
11 Mar 2016
Accepted
16 May 2016
First published
19 May 2016

Phys. Chem. Chem. Phys., 2016,18, 15619-15624
Article type
Paper

In situ tuning of gold nanorod plasmon through oxidative cyanide etching

A. Carattino, S. Khatua and M. Orrit, Phys. Chem. Chem. Phys., 2016, 18, 15619
DOI: 10.1039/C6CP01679K

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