Physical and optical properties of organo-modified silica nanoparticles prepared by sol-gel

IA Rahman, and M. Jafarzadeh, and Coswald Stephen Sipaut @ Mohd Nasri, (2011) Physical and optical properties of organo-modified silica nanoparticles prepared by sol-gel. Journal of Sol-Gel Science and Technology, 59 (1). pp. 63-72. ISSN 0928-0707

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Official URL: http://dx.doi.org/10.1007/s10971-011-2464-1

Abstract

A comparative study on the physical and optical properties of silica nanoparticles prepared by sol-gel has been carried out. Post-modification of as-synthesized silica nanoparticles produced organo-functionalized silica nanoparticles slightly increased in size (similar to 20%) and relatively high aggregation. However, in situ method produced sixfold bigger functionalized particles with good dispersion and less aggregation. Higher organic content was observed for in situ modified nanosilica, leading to a higher surface hydrophobicity that improved compatibility and dispersion in preparation of silica-polymer nanocomposite. Furthermore, in situ and post-modified nanosilica demonstrated a distinct optical activity, photoluminescence and UV compared to the unmodified nanoparticles.

Item Type:Article
Uncontrolled Keywords:Nanosilica, Sol-gel, In situ modification, Post-modification
Subjects:Q Science > Q Science (General)
Divisions:SCHOOL > School of Engineering and Information Technology
ID Code:1242
Deposited By:IR Admin
Deposited On:24 Jun 2015 12:38
Last Modified:24 Jun 2015 12:38

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