Collective excitation of plasmonic hot-spots for enhanced hot charge carrier transfer in metal/semiconductor contacts

Adrien Piot; Stuart K. Earl; Charlene Ng; Svetlana Dligatch; Ann Roberts; Timothy J. Davis; Daniel E. Gómez

doi:10.1039/C5NR01592H

Collective excitation of plasmonic hot-spots for enhanced hot charge carrier transfer in metal/semiconductor contacts†

Adrien Piot,^ab Stuart K. Earl,^c Charlene Ng,^bd Svetlana Dligatch,^e Ann Roberts,^c Timothy J. Davis^bd and Daniel E. Gómez*^bd

Author affiliations

* Corresponding authors

^a Institut National des Sciences Appliquées de Toulouse, 135 Avenue de Rangueil, Toulouse, France

^b Melbourne Centre for Nanofabrication, Australian National Fabrication Facility, Clayton, VIC 3168, Australia

^c School of Physics, The University of Melbourne, Parkville, VIC, Australia

^d CSIRO, Manufacturing Flagship, Private Bag 33, Clayton, VIC, Australia
E-mail: daniel.gomez@csiro.au

^e CSIRO, Manufacturing Flagship, PO Box 218, Lindfield, NSW 2070, Australia

Abstract

We show how a combination of near- and far-field coupling of the localised surface plasmon resonances in aluminium nanoparticles deposited on TiO₂ films greatly enhances the visible light photocatalytic activity of the semiconductor material. We demonstrate two orders of magnitude enhancement in the rate of decomposition of methylene blue under visible light illumination when the surface of TiO₂ films is decorated with gratings of Al nanoparticle dimers.

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DOI: https://doi.org/10.1039/C5NR01592H
Article type: Communication
Submitted: 12 Mar 2015
Accepted: 31 Mar 2015
First published: 09 Apr 2015
This article is Open Access

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Nanoscale, 2015,7, 8294-8298

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Collective excitation of plasmonic hot-spots for enhanced hot charge carrier transfer in metal/semiconductor contacts

A. Piot, S. K. Earl, C. Ng, S. Dligatch, A. Roberts, T. J. Davis and D. E. Gómez, Nanoscale, 2015, 7, 8294 DOI: 10.1039/C5NR01592H

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

Nanoscale

Collective excitation of plasmonic hot-spots for enhanced hot charge carrier transfer in metal/semiconductor contacts†

Abstract

Supplementary files

Article information

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Collective excitation of plasmonic hot-spots for enhanced hot charge carrier transfer in metal/semiconductor contacts

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