Malaysian Journal of Analytical Sciences Vol 20 No 1 (2016): 64 - 72

 

 

 

EFFECT OF SILVER NANOPARTICLE ADDITION ON THE STRUCTURE AND CHARACTERISTICS OF RADIO-PHOTOLUMINESCENCE GLASS DOSIMETER

 

(Kesan Penambahan Nanozarah Argentum Terhadap Struktur dan Sifat – Sifat Dosimeter Kaca Radio – Pendarcahaya)

 

Irman Abdul Rahman¹*, Muhammad Taqiyuddin Mawardi Ayob^1,2, Hur Munawar Kabir Mohd¹,

Ainee Fatimah Ahmad¹, Shamellia Sharin¹, Faizal Mohamed¹, Sidek Ab Aziz², Shahidan Radiman¹

 

¹School of Applied Physics, Faculty of Science and Technology,

Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor Darul Ehsan, Malaysia

²Department of Physics, Faculty of Science,

Universiti Putra Malaysia, 43400 Serdang, Selangor Darul Ehsan, Malaysia

 

*Corresponding author: irman@ukm.edu.my

 

 

Received: 9 December 2014; Accepted: 16 October 2015

 

 

Abstract

A series of silver-activated phosphate glass was prepared by melt quenching method. The effect of silver nanoparticle addition on the phosphate glass microstructure, composition and chemical characteristics was investigated using x-ray diffraction, fourier transform infrared and photoluminescence spectroscopy. Other physical property such as density was also evaluated. The density increased when the amount of silver ions were increased, due to the enhanced formation of non-bridging oxygen. In this study, we discuss the emission mechanism of two radio-photoluminescence peaks at 460 nm and 620 nm, where the electrons and holes produced by γ-irradiation a re-trapped by Ag⁺ ions to produce Ag⁰ and Ag²⁺ ions respectively, when the Ag⁺-doped phosphate glass is exposed to γ-ray. We proposed that an emission mechanism of 460 and 620 nm radio-photoluminescence peaks with these Ag²⁺ and Ag⁰ ions. Furthermore, a correlation between the investigated properties and glass composition is discussed.

 

Keywords: silver nanoparticle, optical and physical properties, radio-photoluminescence glass dosimeter

 

Abstrak

Satu siri gelas argentum-aktif fosfat telah dihasilkan menerusi kaedah peleburan. Kesan penambahan nanobahan argentum ke dalam mikrostruktur gelas fosfat, komposisi dan sifat-sifat kimia dikaji dengan menggunakan pembelauan sinar-X, penjelmaan inframerah Fourier dan spektroskopi pendarcahaya. Sifat fizikal yang lain seperti ketumpatan kacaturut dikaji. Ketumpatan kaca bertambah apabila jumlah ion-ion argentum ditingkatkan, disebabkan oleh peningkatan pembentukan oksigen tanpa-hubung. Dalam kajian ini, kami membincangkan mekanisme pemancaran oleh dua puncak radio-pendarcahaya pada jalur 460 nm dan 620 nm, di mana elektron dan lohong yang terhasil daripada sinar-γ diperangkap oleh ion – ion Ag⁺ seterusnya menghasilkan ion – ion Ag⁰ dan Ag²⁺, apabila kaca Ag⁺-aktif fosfat didedahkan kepada sinar-γ. Kami turut membincangkan mekanisme pemancaran bagi setiap puncak radio-pendarcahaya pada jalur 460 dan 620 nm berdasarkan ion – ion Ag²⁺ dan Ag⁰ berkenaan. Tambahan lagi, hubung kait antara komposisi kaca dan sifat-sifat kaca yang terhasil turut dibincangkan.

 

Kata kunci: nanobahan argentum, sifat fizikal and optik, dosimeter kaca radio-pendarcahaya

 

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