50 citations · 126 across the 5 of their papers we have counts for
5 papers
Novel Observation of Piezoelectricity in VO2
Raktima Basu, G. Mangamma, Sandip Dhara
VO2 is well known for its dual phase transitions; electrical as well as structural, at a single temperature of 340K. The low temperature structural phases of VO2 are different from…
Si and N - vacancy color centers in discrete diamond nanoparticles: Raman and fluorescence spectroscopic studies
K. Ganesan, P. K. Ajikumar, S. Ilango +2
The present study reports on an innovative method to prepare discrete diamond nanoparticles or nanodiamonds (NDs) with high structural and optical quality through top-down approach…
Piezoelectric Domains in the AlGaN Hexagonal Microrods: Effect of Crystal Orientations
A. K. Sivadasan, G. Mangamma, S. Bera +2
Presently, the piezoelectric materials are finding tremendous applications in the micro-mechanical actuators, sensors and self-powered devices. In this context, the studies pertain…
Reduction of residual stress in AlN thin Films synthesized by magnetron sputtering technique
Padmalochan Panda, R. Ramaseshan, N Ravi +5
We report the reduction in residual stress of AlN thin films and also the crystal structure, surface morphology and nanomechanical properties of magnetron sputtered as a function o…
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…