Gold nanoparticle networks with photoresponsive interparticle spacings

Sidhaye, Deepti S. ; Kashyap, Sudhir ; Sastry, Murali ; Hotha, Srinivas ; Prasad, B. L. V. (2005) Gold nanoparticle networks with photoresponsive interparticle spacings Langmuir, 21 (17). pp. 7979-7984. ISSN 0743-7463

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Official URL: http://pubs.acs.org/doi/abs/10.1021/la051125q

Related URL: http://dx.doi.org/10.1021/la051125q

Abstract

Photoresponsive gold nanoparticle networks were prepared by functionalizing them with azobenzene derivatives. A network can be formed when a linker molecule constituting the azobenzene moiety suitably derivatized on either side with gold surface sensitive groups such as thiols and amines is added to the nanoparticle solution. It is shown that the interparticle spacing in the networks could be controlled by the reversible trans-cis isomerization of the azobenzene moiety induced by UV and visible light, respectively. The photoinduced variation in the interparticle spacings is inferred by the changes in the optical spectra of the gold nanoparticles which display a red or blue shift in the surface plasmon resonance peak depending on a decrease or increase in the interparticle spacing, respectively. Transmission electron microscopy images are in consonance with the evidence from the optical spectra.

Item Type:Article
Source:Copyright of this article belongs to American Chemical Society.
ID Code:47116
Deposited On:06 Jul 2011 14:21
Last Modified:06 Jul 2011 14:21

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