Annealing time dependent up-conversion luminescence enhancement in magnesium-tellurite glass
Silver nanoparticles (NPs) embedded Er3+ ions doped magnesium-tellurite glasses are prepared using melt quenching technique. Heat treatment with different time intervals above the glass transition temperature is applied in order to reduce the silver ions (Ag+) to silver NPs (Ago). The transmission e...
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my.utm.491682018-10-31T12:37:20Z http://eprints.utm.my/id/eprint/49168/ Annealing time dependent up-conversion luminescence enhancement in magnesium-tellurite glass Amjad, Raja Junaid Sahar, Md. Rahim Ghoshal, Sib Krishna Dousti, Mohammad Reza Riaz, S. Samavati, Alireza R. Arifin, Ramli Naseem, Shahzad QD Chemistry Silver nanoparticles (NPs) embedded Er3+ ions doped magnesium-tellurite glasses are prepared using melt quenching technique. Heat treatment with different time intervals above the glass transition temperature is applied in order to reduce the silver ions (Ag+) to silver NPs (Ago). The transmission electron microscopy (TEM), differential thermal analyses (DTA), UV-vis-NIR absorption spectroscopy and photoluminescence (PL) spectroscopy are used to examine annealing time dependent structural and optical properties. The characteristics temperatures such as glass transition temperature (Tg), crystallization temperature (Tc) and melting temperature (Tm) obtained from DTA for an as prepared sample are 322 °C, 450 °C and 580 °C, respectively. TEM image clearly shows the homogeneous distribution of silver NPs with an average diameter ∼12 nm. The observed localized surface plasmon resonance (LSPR) band is evidenced at 534 nm. Furthermore, the infrared to visible frequency up-conversion (UC) emission under 786 nm excitation exhibits three emission bands centered at 532 nm, 554 nm and 634 nm corresponding to 2H11/2→ 4I15/2, 4S3/2→ 4I15/2 and 4F9/2→ 4I15/2 transitions of Er3+, respectively. Intensity of all the bands is found to enhance by increasing the annealing time up to 24 h. However, further increase in the annealing time duration (∼40 h) reduces the intensity. Enhancement in the luminescence intensity is understood in terms of the local field effect of the silver NPs whereas the quenching is attributed to the energy transfer from Er3+ ions to silver NPs Elsevier B.V. 2013 Article PeerReviewed Amjad, Raja Junaid and Sahar, Md. Rahim and Ghoshal, Sib Krishna and Dousti, Mohammad Reza and Riaz, S. and Samavati, Alireza R. and Arifin, Ramli and Naseem, Shahzad (2013) Annealing time dependent up-conversion luminescence enhancement in magnesium-tellurite glass. Journal of Luminescence, 136 . pp. 145-149. ISSN 0022-2313 https://doi.org/10.1016/j.jlumin.2012.11.028 |
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QD Chemistry Amjad, Raja Junaid Sahar, Md. Rahim Ghoshal, Sib Krishna Dousti, Mohammad Reza Riaz, S. Samavati, Alireza R. Arifin, Ramli Naseem, Shahzad Annealing time dependent up-conversion luminescence enhancement in magnesium-tellurite glass |
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Silver nanoparticles (NPs) embedded Er3+ ions doped magnesium-tellurite glasses are prepared using melt quenching technique. Heat treatment with different time intervals above the glass transition temperature is applied in order to reduce the silver ions (Ag+) to silver NPs (Ago). The transmission electron microscopy (TEM), differential thermal analyses (DTA), UV-vis-NIR absorption spectroscopy and photoluminescence (PL) spectroscopy are used to examine annealing time dependent structural and optical properties. The characteristics temperatures such as glass transition temperature (Tg), crystallization temperature (Tc) and melting temperature (Tm) obtained from DTA for an as prepared sample are 322 °C, 450 °C and 580 °C, respectively. TEM image clearly shows the homogeneous distribution of silver NPs with an average diameter ∼12 nm. The observed localized surface plasmon resonance (LSPR) band is evidenced at 534 nm. Furthermore, the infrared to visible frequency up-conversion (UC) emission under 786 nm excitation exhibits three emission bands centered at 532 nm, 554 nm and 634 nm corresponding to 2H11/2→ 4I15/2, 4S3/2→ 4I15/2 and 4F9/2→ 4I15/2 transitions of Er3+, respectively. Intensity of all the bands is found to enhance by increasing the annealing time up to 24 h. However, further increase in the annealing time duration (∼40 h) reduces the intensity. Enhancement in the luminescence intensity is understood in terms of the local field effect of the silver NPs whereas the quenching is attributed to the energy transfer from Er3+ ions to silver NPs |
format |
Article |
author |
Amjad, Raja Junaid Sahar, Md. Rahim Ghoshal, Sib Krishna Dousti, Mohammad Reza Riaz, S. Samavati, Alireza R. Arifin, Ramli Naseem, Shahzad |
author_facet |
Amjad, Raja Junaid Sahar, Md. Rahim Ghoshal, Sib Krishna Dousti, Mohammad Reza Riaz, S. Samavati, Alireza R. Arifin, Ramli Naseem, Shahzad |
author_sort |
Amjad, Raja Junaid |
title |
Annealing time dependent up-conversion luminescence enhancement in magnesium-tellurite glass |
title_short |
Annealing time dependent up-conversion luminescence enhancement in magnesium-tellurite glass |
title_full |
Annealing time dependent up-conversion luminescence enhancement in magnesium-tellurite glass |
title_fullStr |
Annealing time dependent up-conversion luminescence enhancement in magnesium-tellurite glass |
title_full_unstemmed |
Annealing time dependent up-conversion luminescence enhancement in magnesium-tellurite glass |
title_sort |
annealing time dependent up-conversion luminescence enhancement in magnesium-tellurite glass |
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Elsevier B.V. |
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2013 |
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http://eprints.utm.my/id/eprint/49168/ https://doi.org/10.1016/j.jlumin.2012.11.028 |
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1643652720055287808 |
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