Showing papers by "Chandran Sudakar published in 2013"
TL;DR: In this article, the authors demonstrate a tunable band gap from 2.32 eV to 2.09ÕeV in phase-pure BiFeO3 by controlling the particle size from 65 nm to 5Õnm.
Abstract: We demonstrate a tunable bandgap from 2.32 eV to 2.09 eV in phase-pure BiFeO3 by controlling the particle size from 65 nm to 5 nm. Defect states due to oxygen and microstrain show a strong dependence on BiFeO3 particle size and have a significant effect on the shape of absorbance curves. Oxygen-defect induced microstrain and undercoordinated oxygen on the surface of BiFeO3 nanoparticles are demonstrated via HRTEM and XPS studies. Microstrain in the lattice leads to the reduction in rhombohedral distortion of BiFeO3 for particle sizes below 30 nm. The decrease in band gap with decreasing particle size is attributed to the competing effects of microstrain, oxygen defects, and Coulombic interactions.
234 citations
TL;DR: In this article, the suppression of antisite defects in LiFe(PO4)1−xF3x with 0.04-approximation was investigated using both sol-gel and hydrothermal methods.
25 citations
TL;DR: In this paper, a solution mixing and casting of Cd(NO3)2·4H2O and poly(ethylene oxide) (PEO) at different molar ratios (1:100 − 1:600) followed by hydrogen sulfide treatment were employed to fabricate solid films of cadmium sulfide (CdS)/polyethylene Oxide (Poxide) nanocomposites.
12 citations