121 citations · 309 across the 12 of their papers we have counts for
12 papers
Role of microstructure and structural disorder on tribological properties of polycrystalline diamond films
P. K. Ajikumar, K. Ganesan, N. Kumar +3
Polycrystalline diamond films with systematic change in microstructure that varies from microcrystalline to nanocrystalline structure are synthesized on Si by hot filament chemical…
Phonon confinement and substitutional disorder in Cd1-xZnxS Nanocrystals
Satyaprakash Sahoo, S. Dhara, V. Sivasubramanian +2
1LO optical phonons in free-standing mixed Cd1-xZnxS nanocrystals, synthesized using chemical precipitation, are investigated using Raman spectroscopy. As expected for the nanocrys…
Synthesis, characterization and low temperature studies of iron chalcogenide superconductors
J. Janaki, T. Geetha Kumary, Awadhesh Mani +4
We have synthesized tetragonal iron selenide and telluride superconductors through solid state reaction at 450deg.C and 550deg.C respectively. These synthesis temperatures have bee…
Multi-phonon Raman scattering in GaN nanowires
S. Dhara, Sharat Chandra, G. Mangamma +9
UV Raman scattering studies show longitudinal optical (LO) mode up to 4th order in wurtzite GaN nanowire system. Frohlich interaction of electron with the long range electrostatic…
Nitrogen ion beam synthesis of InN in InP (100) at elevated temperature
S. Dhara, P. Magudapathy, R. Kesavamoorthy +8
InN phase is grown in crystalline InP(100) substrates by 50 keV N+ implantation at an elevated temperature of 400 deg C followed by annealing at 525 deg C in N2 ambient. Crystallog…
Optical characterization of GaN by N+ implantation into GaAs at elevated temperature
S. Dhara, P. Magudapathy, R. Kesavamoorthy +7
Both hexagonal wurtzite and cubic zinc blend GaN phases were synthesized in GaAs by 50 keV N+ implantation at 400 deg C and subsequent annealing at 900 deg C for 15 min in N2 ambie…