Silica coating of nanoparticles by the sonogel process

Langmuir : the ACS Journal of Surfaces and Colloids
Quan ChenXian Ting Zeng

Abstract

A modified aqueous sol-gel route was developed using ultrasonic power for the silica coating of indium tin oxide (ITO) nanoparticles. In this approach, organosilane with an amino functional group was first used to cover the surface of as-received nanoparticles. Subsequent silica coating was initiated and sustained under power ultrasound irradiation in an aqueous mixture of surface-treated particles and epoxy silane. This process resulted in a thin but homogeneous coverage of silica on the particle surface. Particles coated with a layer of silica show better dispersability in aqueous and organic media compared with the untreated powder. Samples were characterized by high-resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS), and the zeta potential.

References

Apr 5, 2000·Chemistry : a European Journal·F Caruso
Nov 10, 2004·Journal of Colloid and Interface Science·Jiakuan SunLorraine F Francis
Feb 22, 2005·Journal of Colloid and Interface Science·Yoshio KobayashiLuis M Liz-Marzán
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Mar 23, 1990·Science·K S Suslick

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Citations

Apr 20, 2013·Biofouling·Altan Ozkan, Halil Berberoglu
Sep 28, 2010·Macromolecular Bioscience·Lin XiaZhibo Li
Apr 20, 2010·Advanced Materials·Jin Ho Bang, Kenneth S Suslick
Oct 31, 2009·Langmuir : the ACS Journal of Surfaces and Colloids·Feng ZhaoHongjie Luo

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