4-8 July 2016
Kramer Law building
Africa/Johannesburg timezone
The Proceedings of SAIP2016 published on 24 December 2017
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Thermal effects on the plasmonic properties of Ag embedded glass based metamaterials

Presented by Dr. Promod KUMAR on 8 Jul 2016 from 10:00 to 10:20
Type: Oral Presentation
Track: Track A - Division for Physics of Condensed Matter and Materials

Abstract

Plasmon resonance in noble metals such as Ag, Cu and Au at the nanoscale is technologically important for various applications as it opens up a new horizon at the nanoscale. Silver embedded in a soda-lime glass matrix was synthesized by the ion-exchange (Ag+ - Na+) method followed by thermal annealing in an air atmosphere. The effects of annealing temperature and time on the plasmonic response and optical activity of the silver in soda-lime glass have been investigated using Ultra violet-visible absorption spectroscopy and photoluminescence. The surface plasmon resonance (SPR) at a hybrid metal–dielectric interface for silver was shown to be influenced by the presence of Ag+ ions and the increased particle size of the Ag nanoparticles as a function of post annealing temperature. This study revealed that the SPR and the luminescence properties were strongly dependent on the glass matrix, which could not be achieved in all types of glass slides. During annealing the Ag+ is reduced to Ag0 atoms and subsequently forms silver nanoparticles in the oxidizing atmosphere. The particle sizes calculated from Mie theory were in excellent agreement with the size measured from Field Emission Gun Transmission Electron Microscope (FEGTEM). The nano-sized Ag nanoclusters on the glass matrix may be suitable for the future prospective for potential applications in optical data storage devices.

Award

no

Level

n/a

Supervisor

Prof HC Swart; swarthc@ufs.ac.za; University of the Free State

Paper

yes

Permission

yes

Place

Location: Kramer Law building
Address: UCT Middle Campus Cape Town
Room: 4B


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