G C Das
Articles written in Bulletin of Materials Science
Volume 5 Issue 3-4 August 1983 pp 277-286
Optical absorption characteristics for ultra-fine bismuth particles having dimensions around 10 nm and dispersed in both silicate and vanadium phosphate glass matrices have been investigated in the wavelength range 300 to 700 nm. Bismuth particles in vanadium phosphate matrix show an absorption peak around 440 nm whereas in silicate glass matrix they give two peaks in the ranges 500 to 530 nm and 420 to 430 nm respectively. The peak positions in all the glass-bismuth metal systems are predicted in fair agreement with experiment by Maxwell-Garnett (
Volume 12 Issue 5 December 1989 pp 449-456
Optical absorption characteristics in a glass-metal nanocomposite system involving bismuth metal have been analysed using effective medium theories with a model incorporating single strand chains and
Volume 13 Issue 4 September 1990 pp 255-258
Gel has been prepared with nickel chloride and glucose in the starting solution followed by heat treatment at higher temperature, where glucose decomposes to carbon and water vapour, which in turn react to form hydrogen
Volume 15 Issue 4 August 1992 pp 363-366
Glass-silver microcomposites have been prepared through sol-gel route by reducing the gel-containing AgNO3 with alkaline formaldehyde solution. The product has been characterized by atomic absorption spectroscopy and X-ray diffraction technique. Optical spectroscopy of thin films has been studied.
Volume 16 Issue 4 August 1993 pp 317-324
Volume 18 Issue 5 September 1995 pp 497-501
The present investigation deals with the synthesis of monolithic NiCl2-silica gels obtained by hydrolysis and polycondensation of tetraethoxy silanes. This sol to gel formation can mainly be controlled by adjusting some variables e.g. acid content of the solution, ageing and leaching times. A minimum acid content was found necessary to prepare uncracked gel while ageing and leaching times were found to be not that sensitive for the formation of uncracked gels.
Volume 43, 2020
Continuous Article Publishing mode
Click here for Editorial Note on CAP Mode