Formation and optical properties of cylindrical gold nanoshells on silica and titania nanorods

Steven J. Limmer; Tammy P. Chou; Guozhong Cao

doi:10.1117/12.451624

4 November 2002 Formation and optical properties of cylindrical gold nanoshells on silica and titania nanorods

Steven J. Limmer, Tammy P. Chou, Guozhong Cao

Proceedings Volume 4809, Nanoscale Optics and Applications; (2002) https://doi.org/10.1117/12.451624
Event: International Symposium on Optical Science and Technology, 2002, Seattle, WA, United States

Abstract

Metal-insulator core-shell structures have been demonstrated to have interesting and tunable optical properties. Systems previously investigated include silica-capped gold particles and gold shells surrounding silica particles. However, many of the systems studied so far have been spherical (or zero-dimensional). Thus, it would be of interest to look at the synthesis and optical properties of one-dimensional (i.e., rod-like) nanostructures. In this paper, the authors present and discuss the formation and properties of silica and titania nanorods encapsulated with a thin gold shell. Nanorods of silica and titania ~10 μm in length and with diameters ~ 90-200 nm are made by combining sol-gel electrophoresis with a suitable template. After removing the template at high temperature, the surface of the rods is re-hydrolyzed by heating in water. 3-Aminopropyltrimethoxysilane is reacted with the surface hydroxyl groups, self-assembling amine functionality on the surface of the rods. These groups act as anchoring sites for the gold, which forms a thin shell around the oxide nanorod. UV-vis absorbance spectra of these samples are analyzed to determine the relationships between shell thickness, core size, core material and properties.

Citation Download Citation

Steven J. Limmer, Tammy P. Chou, and Guozhong Cao "Formation and optical properties of cylindrical gold nanoshells on silica and titania nanorods", Proc. SPIE 4809, Nanoscale Optics and Applications, (4 November 2002); https://doi.org/10.1117/12.451624

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