i) I have been in the teaching profession past 16 years and worked as a teaching faculty at different institutions. I did my Ph.D. as an external student at Jawaharlal Nehru Technological University Anantapur (JNTUA). I defended my thesis for a PhD degree in 2015. My research field is on “Magnetic Semiconductor Nanoparticles”. The title of his thesis work is “Synthesis and Characterization of Rare earth (Ce/Dy/Er) Doped Diluted Magnetic Semiconductor (ZnO) Nanoparticles”. I have published eight research papers to date in peer-reviewed journals of repute, out of which 3 are included in my thesis.
ii) My teaching is always student-centric. Apart from teaching, I have conducted different scientific events like conferences and workshops as a convenor/ organizing member to bring scientific curiosity to the students and faculties. Also, I have attended many conferences, workshops, and Faculty Development Programmes (FDPs) to upgrade myself in the current scientific trends.
iii) Since July 20
EDUCATION
Physics in Semiconducting Nanomaterials, 2010 – 2015, awarded on June, 2015, Jawaharlal Nehru Tecnological University Anantapur, Ananthapuramu, A.P., India.
Research Topics: Synthesis and Characterization of Rare earth (Ce/Dy/Er) Doped Diluted Magnetic Semiconductor (ZnO) Nanoparticles. (Research Supervisor: Late Dr. G. Krishnaiah)
M.Sc: Physics:
Electives Microprocessors and Condensed Matter Physics, 2004 – 2006, Sri Krishnadevaraya University, Ananthapuramu, A.P., India, with 66.47%
B.Sc:
Mathematics, Physics and Statistics, 2000 – 2003, Sri Venkateswara University, Tirupati, A.P.,India, with 60.67%
RESEARCH, TEACHING, or OTHER INTERESTS
Condensed Matter Physics, Electronic, Optical and Magnetic Materials, Materials Science, Colloid and Surface Chemistry
Erbium induced magnetic properties of Er/ZnO nanoparticles C. Jayachandraiah, K. Sivakumar, A. Divya, G. Krishnaiah Aip Conference Proceedings, 2016 Pure and Er (2, 3 and 4 at. %) doped ZnO nanoparticles have been synthesized by chemical co-precipitation method. EDS spectrum confirmed the presence of Zn, O and Er in the synthesized samples. The XRD measurements confirmed the hexagonal wurtzite structure of ZnO for all samples. The crystallite size of the samples decreases with increase in concentration and are compatible with the results that obtained from TEM analysis.EPR spectra exhibitedferromagnetic signals the substitution Er The possible ferromagnetic zinc interstials signal is appeared for 2 at. % of Er dopant. The room temperature ferromagnetic is observed only for 2 at. % of Er while all other samples exhibiting weak ferromagnetic nature.
Structural and photoluminescence properties of Ce, Dy, Er-doped ZnO nanoparticles C. Jayachandraiah, K. Siva Kumar, G. Krishnaiah Aip Conference Proceedings, 2015 Undoped ZnO and rare earth elements (Ce, Dy and Er with 2 at. %) doped nanoparticles were synthesized by wet chemical co-precipitation method at 90°C with Polyvinylpyrrolidone (PVP) as capping agent. The structural, morphological, compositional and photoluminescence studies were performed with X-ray diffraction (XRD), Transmission electron microscopy (TEM), Energy dispersive spectroscopy (EDS), FTIR spectroscopy and Photoluminescence (PL) respectively. XRD results revealed hexagonal wurtzite structure with average particle size around 18 nm - 14 nm and are compatible with TEM results. EDS confirm the incorporation of Ce, Dy and Er elements into the host ZnO matrix and is validated by FTIR analysis. PL studies showed a broad intensive emission peak at 558 nm in all the samples. The intensity for Er- doped ZnO found maximum with additional Er shoulder peaks at 516nm and 538 nm. No Ce, Dy emission centers were found in spectra.
Erbium induced raman studies and dielectric properties of Er-doped ZnO nanoparticles C. Jayachandraiah, G. Krishnaiah Advanced Materials Letters, 2015 Pure and erbium (1.30, 1.79, 2.83 and 3.53 at. %) doped ZnO nanoparticles are synthesized by wet chemical co - precipitation method. The synthesized s amples are characterized by powder X - ray diffraction (XRD), energy - dispersive analysis of X - rays (EDAX), transmission electron microscopy (TEM), Raman spectroscopy, UV - visible diffusion reflectance spectroscopy (DRS) and LCR Impedance spectroscopy. The XRD measurements confirmed the hexagonal wurtzite structure of all samples and size of the particle is found to be decreased with Er content. TEM images show spherical shape with more agglomeration in Er doped ZnO nanoparticles. Raman spectra confirmed the he xagonal wurtzite structure of pure and Er doped ZnO nanoparticles with E 2 (high) mode at 438 cm - 1 and presence of other possible defects. UV - visible DRS shows decrease in the band gap with increasing Er 3+ in ZnO host. Dielectric constant, dielectric loss f actor and ac conductivity properties were decreased with Er
Ce induced structural and optical properties of Ce doped Zno nanoparticles International Journal of Chemtech Research, 2014
Effect of Nd on structural and optical properties of Nd doped ZnO nanoparticles C. Jayachandraiah, A. Divya, K. Siva Kumar, G. Krishnaiah Proceedings of the International Conference on Advanced Nanomaterials and Emerging Engineering Technologies Icanmeet 2013, 2013 Polyvinylpyrrolidone capped ZnO and Nd (0.5 and 1 at.%) ZnO nanoparticles have been prepared by chemical co-precipitation method in aqueous media. The as-prepared nanoparticles were subjected to compositional, structural, morphological and photoluminescence studies. EDS confirmed the presence of Nd element in ZnO nanoparticles. X-ray diffraction patterns and TEM studies established that pristine and Nd doped ZnO nanoparticles exhibited wurtzite crystal structure. The average particle size obtained from the XRD and TEM were in good agreement with each other. Photoluminescence studies on Nd doping amplify the defect related emission.
