Issue 34, 2011
From the journal:

Journal of Materials Chemistry

Improved thermal stability of Au nanorods by use of photosensitive layered titanates for gas sensing applications

Alessandro Antonello,a   Enrico Della Gaspera,a   Julia Baldauf,b   Giovanni Matteic  and  Alessandro Martucci*a  

* Corresponding authors

a IOM-CNR, INSTM and Dipartimento di Ingegneria Meccanica Settore Materiali, Università di Padova, Via Marzolo 9, Padova, Italy

b School of Chemistry & Bio21 Institute, University of Melbourne, Parkville, VIC, Australia

c Dipartimento di Fisica, Università di Padova, Via Marzolo, 8, Padova, Italy

Abstract

Au nanorods have shown high potential applications due to strong and aspect ratio dependent surface plasmon resonances. A major limitation in the use of such nanostructures is related to their tendency to transform into the most thermodynamically stable spherical shape under heat or radiation exposure. In this work, we propose a method to delay the rod to sphere transformation, stabilizing the cylindrical shape up to 400 °C. This has been accomplished by using photosensitive-layered titanates, which can be densified and stiffened by UV irradiation. Au nanorods dispersed in titanate films were deposited by spin coating and treated by both UV irradiation and thermal annealing at different temperatures. By properly combining UV curing and thermal annealing, this method allows to obtain Au nanorods covered by crystalline TiO2 rigid shells and to retain their shape and peculiar optical properties. Finally, the effect of interaction with specific gas analytes on the plasmon resonances of Au nanorods in TiO2 anatase films has been exploited for optical gas sensing applications.

Graphical abstract: Improved thermal stability of Au nanorods by use of photosensitive layered titanates for gas sensing applications

About
Cited by
Related
Download options Please wait...

Article information

DOI
https://doi.org/10.1039/C1JM12537K
Article type
Paper
Submitted
03 Jun 2011
Accepted
14 Jun 2011
First published
01 Aug 2011

J. Mater. Chem., 2011,21, 13074-13078

Permissions

Request permissions

Improved thermal stability of Au nanorods by use of photosensitive layered titanates for gas sensing applications

A. Antonello, E. Della Gaspera, J. Baldauf, G. Mattei and A. Martucci, J. Mater. Chem., 2011, 21, 13074 DOI: 10.1039/C1JM12537K

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Spotlight

Advertisements