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K Veera Brahmam
Articles written in Bulletin of Materials Science
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Volume 28 Issue 5 August 2005 pp 411-414 Single Crystals
Crystal growth and reflectivity studies of Zn1–𝑥Mn𝑥Te crystals
K Veera Brahmam D Raja Reddy B K Reddy
Single crystals of Zn1–𝑥Mn𝑥Te were prepared by vertical Bridgman crystal growth method for different concentrations of Mn. Chemical analysis and reflectivity studies were carried out for compositional and band structure properties. Microscopic variation in composition between starting and end compounds was observed from EDAX analysis. Linear dependence of fundamental absorption edge (𝐸0) as a function of Mn concentration (𝑥) was expressed in terms of a straight line fit and a shift in 𝐸0 towards higher energy was observed in reflectivity spectra of Zn1–𝑥Mn𝑥Te.
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Volume 30 Issue 3 June 2007 pp 215-218 Polymers
Thermal and IR studies on copper doped polyvinyl alcohol
Ch Linga Raju J L Rao B C V Reddy K Veera Brahmam
5 mol% PVA : 𝑥 mol% Cu2+ polymer films were prepared by casting process. Thermal transitions and thermal degradation of samples with respect to copper concentration were studied by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA), respectively. Increase in glass transition temperature as a function of copper concentration shows a strong branching and steric effects in copper doped PVA complexes. Thermal degradation of films to an extent of 4–5% was found with an increase in copper content. FTIR spectrum of PVA doped Cu2+ ions indicate the presence of O–H, C–H, C=C and C–O groups.
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Bulletin of Materials Science
Volume 45, 2022
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Continuous Article Publishing mode
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Bulletin of Materials Science | News
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Dr Shanti Swarup Bhatnagar for Science and Technology
Posted on October 12, 2020Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
Chemical Sciences 2020Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
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Posted on July 25, 2019Click here for Editorial Note on CAP Mode
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