Optical, thermal and dielectric studies of silver-silica nanoparticles synthesized via sol-gel technique

Taifunisyam, T. and Souad A., M. and Mohd Rafie, J. and Wan Jefrey, B. and Chin, K.M. and Chia, C.C. and Tan, J.H. (2014) Optical, thermal and dielectric studies of silver-silica nanoparticles synthesized via sol-gel technique. In: 28th Regional Conference on Solid State Science and Technology 2014 (RCSSST 2014)., 25 - 27 November 2014, Cameron Highland, Pahang, Malaysia..

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Abstract

Silver-silica nanocomposites (Ag-Si02NCs), with unique properties such as hi~hlY resonant particle plasmons, conductivity and potential applications in optics and varl°t nanoelectronics are very attractive materials for sensing probes in biotechnology. Ag-Si02J>:l ~ with various compositions were synthesized through sol-gel technique. The morphology, opuca and thermal stability of the nanocomposite were investigated and was compared with pure sol-gel t~ determine the effects of the nanoparticles. Transmission electron microscopy (TEM) confirmed tha Si02 was encapsulated Ag with mean size of 30 nm. Uv-vis spectroscopy shows that the surface plasmon resonance (SPR) peak show Ag-Si02 NCs were greatly reduce due to the Si02 particles~ The permittivity and refractive index were decreased as the composition of Ag was increased ad composition of 60% silver. The real permittivity is negative along the visible region. The tren stability of Ag-Si02NCs were increased with the increased amount of silver.

Item Type: Conference or Workshop Item (Paper)
Funders: UNSPECIFIED
Uncontrolled Keywords: dielectric properties, negative permittivity, refractive index, Silver Silica nanocomposite, sol-gel, various composition, thermal properties.
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TP Chemical technology
Divisions: Faculty of Engineering > Department of Chemical Engineering
Depositing User: Mr. Mohd Safri
Date Deposited: 20 Jun 2016 00:56
Last Modified: 20 Jun 2016 00:56
URI: http://eprints.um.edu.my/id/eprint/15941

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