Exploiting optothermal conversion for nanofabrication: site-selective generation of Au/TiO2 inverse opals

Ivano Alessandri; Matteo Ferroni

doi:10.1039/B913478F

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Exploiting optothermal conversion for nanofabrication: site-selective generation of Au/TiO₂ inverse opals†

Ivano Alessandri*^a and Matteo Ferroni^b

Author affiliations

* Corresponding authors

^a INSTM and Chemistry for Technologies Laboratory, University of Brescia, via Branze 38, Brescia, Italy
E-mail: ivano.alessandri@ing.unibs.it

^b CNR-INFM and Department of Chemistry and Physics for Engineering and Materials, University of Brescia, via Valotti 9, Brescia, Italy

Abstract

Optothermal conversion mediated by gold nanoparticles was exploited to generate localized Au/TiO₂ inverse opal structures in direct opal substrates. The local enhancement of the electromagnetic field made these nanostructures active sites for SERS and contributed to boosting the efficiency of some reactions, such as the photodegradation of methylene blue, under both UV and Vis irradiation.

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Supplementary files

SEM image (enlarged view) of the resulting structures,microRaman monitoring of UV-induced photodegradation of MB onto a50 nm thick anatase film deposited onto a planar support, andmicroRaman monitoring of MB photodegradation upon laser irradiationat the power of 0.05 mW PDF (603K)

Article information

DOI: https://doi.org/10.1039/B913478F
Article type: Paper
Submitted: 07 Jul 2009
Accepted: 22 Aug 2009
First published: 16 Sep 2009

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J. Mater. Chem., 2009,19, 7990-7994

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Exploiting optothermal conversion for nanofabrication: site-selective generation of Au/TiO₂ inverse opals

I. Alessandri and M. Ferroni, J. Mater. Chem., 2009, 19, 7990 DOI: 10.1039/B913478F

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Journal of Materials Chemistry