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309 results on '"Khan, Zishan H."'

2. Influence of Gamma Irradiation on Structural and Optical Parameters of Se85Te9Ag6 Nanochalcogenide Thin Films

Author

Srivastava, Archana, Khan, Zishan H., Khan, Shamshad A., Ghosh, Arindam, Series Editor, Chua, Daniel, Series Editor, de Souza, Flavio Leandro, Series Editor, Aktas, Oral Cenk, Series Editor, Han, Yafang, Series Editor, Gong, Jianghong, Series Editor, Jawaid, Mohammad, Series Editor, Khan, Zishan Husain, editor, Jackson, Mark, editor, and Salah, Numan A., editor

Published
2024
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3. Studies of Se85Te12Bi3 and Se85Te9Bi6 Nanochalcogenide Thin Films at Different Working Pressures

Author

Srivastava, Aditya, Khan, Zubair M. S. H., Khan, Zishan H., Khan, Shamshad A., Ghosh, Arindam, Series Editor, Chua, Daniel, Series Editor, de Souza, Flavio Leandro, Series Editor, Aktas, Oral Cenk, Series Editor, Han, Yafang, Series Editor, Gong, Jianghong, Series Editor, Jawaid, Mohammad, Series Editor, Khan, Zishan Husain, editor, Jackson, Mark, editor, and Salah, Numan A., editor

Published
2024
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8. Optical Sensors Based on Metal–Organic Frameworks

Author

Johari, Rahul, Kumar, Pawan, Samariya, Urmila, Budhiraja, Narender, Siddhartha, Agrahari, Kaushlendra, Pathak, Chandra Shakher, Singh, Pramod K., Khan, Zishan H., Bhatia, Mamta, Kamble, Shailesh D., Singh, Subhash, Atai, Javid, Series Editor, Liang, Rongguang, Series Editor, Dinish, U.S., Series Editor, Sonker, Rakesh Kumar, editor, Singh, Kedar, editor, and Sonkawade, Rajendra, editor

Published
2023
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15. Perovskite-Based Gas Sensors

Author

Johari, Rahul, Shambhavi, Kumar, Utkarsh, Sonker, Rakesh K., Kumar, Pawan, Siddhartha, Singh, Renu, Garg, Devesh, Victor, Okai, Singh, Pramod K., Khan, Zishan H., Agrahari, Kaushlendra, Sonker, Rakesh Kumar, editor, Singh, Kedar, editor, and Sonkawade, Rajendra, editor

Published
2022
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34. Introduction to Nanomaterials

Author

Khan, Zishan H., Kumar, Avshish, Husain, Samina, Husain, M., Öchsner, Andreas, Series editor, da Silva, Lucas F. M., Series editor, Altenbach, Holm, Series editor, Husain, Mushahid, editor, and Khan, Zishan Husain, editor

Published
2016
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39. Effect of ambient argon pressure on the structural, optical and electrical properties of non-crystalline Se85Te3Bi12 nano-thin films.

Author

Srivastava, Aditya, Khan, Zishan H, and Khan, Shamshad A

Subjects
*OPTICAL properties, *LIQUID nitrogen, *LIGHT absorption, *LIGHT transmission, *FIELD emission electron microscopy, *BAND gaps, *ARGON
Abstract

In this research work, we have synthesized non-crystalline Se85Te3Bi12 chalcogenide glasses by conventional melt quenching technique. The differential scanning calorimetry measurement of the synthesized specimen was done to confirm the glassy as well as non-crystalline nature of the bulk Se85Te3Bi12 alloy. The nano-thin films of thickness 30 nm of the synthesized sample at two different ambient argon pressures (1 Torr and 3 Torr) were made using the physical vapor condensation technique at a constant substrate temperature of 77 K using liquid nitrogen. The non-appearance of prominent peaks in the high-resolution x-ray diffractometer profile confirmed the non-crystalline nature of synthesized nano-thin films. The morphological analysis of the prepared nano-thin films using Field emission scanning electron microscopy confirmed the nanochalcogenide having particle size ranges from 30–90 nm. The Fourier transform infrared (FTIR) spectroscopy suggests the presence of moisture and carbon impurities in the prepared nano-thin films. The broad optical transmission shadow observed in the FTIR results is an essential requirement for new-generation IR systems. Based on UV-visible spectroscopy, optical parameters such as optical absorption coefficients, Urbach energy, optical band gaps, Tauc's parameter and extinction coefficients were measured for synthesized Se85Te3Bi12 nano-thin films. The value of absorption coefficients, Tauc's parameters, optical band gap and extinction coefficients increases with the increase of ambient argon pressure. The outcome of these studies recommends that these materials can be a preeminent candidate for photovoltaic applications. Photoluminescence spectroscopy results are accredited to the accumulation of non-crystalline nanochalcogenide particles on the substrates. DC conductivity measurements further confirm the semiconducting nature of the nanochalcogenide Se85Te3Bi12 thin films. [ABSTRACT FROM AUTHOR]

Published
2024
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