I  U  P  A  C






News & Notices

Organizations & People

Standing Committees

Divisions

Projects

Reports

Publications
..CI
..PAC
..Macro. Symp.

..Books
..Solubility Data

Symposia

AMP

Links of Interest

Search the Site

Home Page

 

Pure Appl. Chem. Vol. 72, Nos. 1-2, pp. 257-267, 2000

Special Topic Issue on the Theme of
Nanostructured Systems

 

Silica-coated metals and semiconductors. Stabilization and nanostructuring

Marta Alejandro-Arellano, Thearith Ung, Álvaro Blanco, Paul Mulvaney, and Luis M. Liz-Marzán*

*Departamento de Química Física, Universidade de Vigo, E-36200, Vigo, Spain

Abstract: We present in this paper the use of silica-coating for nanostructuring metal and semiconductor nanoparticles. The basic concept is the strict tailoring of the interparticle spacing through the thickness of the silica shell. Three different experiments are presented that exemplify this concept. The first example consists of the preparation of thin films using the layer-by-layer self-assembly of gold nanoparticles, either uncoated or coated with thin silica shells. The observed optical effects are interpreted using effective medium theory. The second and third experiments are related to the preparation of three-dimensional nanostructures, either as concentrated dispersions of thickly coated Au or CdS nanoparticles, or as opals prepared from such core-shell nanoparticles. Within these crystalline solids, intercore distance is again dictated by the thickness of the silica shells.

Back to Contents for access to full text


Page last modified 5 May 2000.
Copyright ©2000 International Union of Pure and Applied Chemistry.
Questions or comments about IUPAC, please contact, the Secretariat.
Questions regarding the website, please contact web manager.