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

Fulvio Ratto; Paolo Matteini; Sonia Centi; Francesca Rossi; Roberto Pini

doi:10.1117/12.840971

16 February 2010 Stability of cetrimonium and silica modified gold nanorods/polyvinyl alcohol nano-composites upon near infrared laser excitation

Fulvio Ratto, Paolo Matteini, Sonia Centi, Francesca Rossi, Roberto Pini

Author Affiliations +

Proceedings Volume 7577, Plasmonics in Biology and Medicine VII; 757716 (2010) https://doi.org/10.1117/12.840971
Event: SPIE BiOS, 2010, San Francisco, California, United States

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.

Citation Download Citation

Fulvio Ratto, Paolo Matteini, Sonia Centi, Francesca Rossi, and Roberto Pini "Stability of cetrimonium and silica modified gold nanorods/polyvinyl alcohol nano-composites upon near infrared laser excitation", Proc. SPIE 7577, Plasmonics in Biology and Medicine VII, 757716 (16 February 2010); https://doi.org/10.1117/12.840971

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available