Universiti Teknologi Malaysia Institutional Repository

Stimulated luminescence behavior by embedding activated silver nanoparticles in tellurite glass

Mohammad Yusoff, Nurulhuda and Sahar, Md. Rahim (2015) Stimulated luminescence behavior by embedding activated silver nanoparticles in tellurite glass. Chalcogenide Letters, 12 (6). pp. 313-323. ISSN 1584-8663

[img]
Preview
PDF (Abstract)
89kB

Abstract

A series of samarium doped magnesium tellurite glass embedded silver nanoparticles has successfully been prepared by melt quenching technique. The amorphous nature of the glass is determined by X-ray diffraction method while the existences of Ag NPs are confirmed using Transmission Electron Microscopy analysis. The optical measurements are performed by UV-Vis absorption and photoluminescence spectroscopy. It is found that the glass is amorphous in nature while the TEM image displays the randomly oriented spherical and non-spherical silver NPs with an average size of about 17 nm in diameter. From the UV-Vis absorption spectra, the surface plasmon resonance (SPR) peaks are detected at 550 and 578 nm while from the PL spectra, a single emission band for each composition which corresponds to 4G5/2?6H11/2 transition is observed under an excitation of 554 nm. The intensity of this transition enhances as the concentration of AgCl is increased up to 0.4 mol%. Meanwhile the Q-factor increases with the increasing of up to 0.4 mol% AgCl which indicates the phonon loss through the non-radiative emission is reduced. At this composition, the decay lifetime reduces which indicate that the energy transfer from Ag NPs to Sm3+ ions have effectively taken place, resulted in a small dissipation of energy. On the other hand, beyond 0.4 mol% AgCl, the Q-factor is decreased while the decay lifetime is increased.

Item Type:Article
Uncontrolled Keywords:electron microscopy, glasses
Subjects:Q Science > QC Physics
Divisions:Science
ID Code:56138
Deposited By: Muhamad Idham Sulong
Deposited On:15 Nov 2016 15:47
Last Modified:15 Nov 2016 15:47

Repository Staff Only: item control page