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Proceedings Paper

Stability of cetrimonium and silica modified gold nanorods/polyvinyl alcohol nano-composites upon near infrared laser excitation
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Paper Abstract

We provide novel insight into the photothermal stability of different solutions of gold nanorods embedded in a semi-solid PVA environment, which may produce different effects with respect e.g. to the aqueous colloidal suspension. We investigate gold nanorods with different average dimensions and surface modifications (cetrimonium bromide (CTAB) and porous silica (p-silica)). Under near-infrared laser pulses between 20 ms and 20 s, the effective photothermal stability is higher in large than in small nanoparticles and in CTAB-protected than in p-silica-modified nanoparticles. At least up to ~200 °C there occurs only partial deformation of the gold nanorods with negligible formation of stable byproducts. We understand these results as the interplay of different factors, including the protection exerted from the semi-solid environment and the aggregation of the nanoparticles.

Paper Details

Date Published: 16 February 2010
PDF: 8 pages
Proc. SPIE 7577, Plasmonics in Biology and Medicine VII, 757716 (16 February 2010); doi: 10.1117/12.840971
Show Author Affiliations
Fulvio Ratto, Istituto di Fisica Applicata Nello Carrara, CNR (Italy)
Paolo Matteini, Istituto di Fisica Applicata Nello Carrara, CNR (Italy)
Sonia Centi, Univ. degli Studi di Firenze (Italy)
Francesca Rossi, Istituto di Fisica Applicata Nello Carrara, CNR (Italy)
Roberto Pini, Istituto di Fisica Applicata Nello Carrara, CNR (Italy)


Published in SPIE Proceedings Vol. 7577:
Plasmonics in Biology and Medicine VII
Tuan Vo-Dinh; Joseph R. Lakowicz, Editor(s)

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