Articles written in Bulletin of Materials Science
Volume 17 Issue 6 November 1994 pp 1049-1055
Successively pulse plated cadmium selenide films and their photoelectrochemical behaviour
V Subramanian K R Murali N Rangarajan A S Lakshmanan
In successive pulse plating, the pulse deposition is repeated after a definite duration of plating preceded by a mild cleaning of the electrode and with a fresh deposition bath for the same duration. In this study, CdSe films were deposited on Ti substrates by successive pulse plating from a bath containing CdSO4 and SeO2 at a current density of 80 mA cm−2 and a duty cycle of 3·3% for a duration of 30 min. The films heat-treated to 550°C for 20 min in argon atmosphere, were polycrystalline with a hexagonal structure. At an illumination of 60 mW cm−2, a conversion efficiency of 4·5% for the photoetched film and 1·7% for the chemically etched one were determined.
Volume 18 Issue 7 November 1995 pp 875-881
A comparative study on CdSe synthesized at low temperature
H Padmanabha Sarma V Subramanian N Rangarajan K R Murali
CdSe is a well-known semiconductor which finds applications as photoconductors, photovoltaic cells and other optoelectronic devices. In this paper structural studies and carrier concentration measurements of vacuum evaporated CdSe films obtained by using CdSe synthesized by simple precipitation technique are presented.
Volume 45 All articles Published: 28 February 2022 Article ID 0044
Electromagnetic shielding efficiency of carbon fibre fabric-sandwiched epoxy–MWCNT nanocomposites
ABHISHEK SHARMA MYNENI SUKESH BABU ASAPU VINAYA KUMAR R SARATHI V SUBRAMANIAN
The impact of reinforcing multi-walled carbon nanotubes (MWCNT) and uni-directional carbon fibre fabric (UCFF) in the epoxy polymer matrix on the electromagnetic interference shielding efficiency (EMI SE) is studied in the X-band frequency range (8–12 GHz). The increase in the weight percentage (wt%) of pristine MWCNT increases the EMI SE of the nanocomposites. Inclusion of UCFF, as a layer, enhances the EMI SE of the structure to a great extent giving an EMI SE of around 75 dB at 12 GHz for UCFF-sandwiched 5 wt% MWCNT–epoxy composite. The layered structure, epoxy–MWCNT/UCFF/epoxy–MWCNT introduces heterogeneity and this results in a SE much higher than the individual contributions of MWCNT and UCFF. The analysis suggests that the presence of thin layer of UCFF absorbs the radiation apart from inducing multiple scattering enhancing the absorption within the MWCNT– epoxy region.
Volume 46, 2023
Continuous Article Publishing mode
Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
Chemical Sciences 2020
Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
Physical Sciences 2020
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