Title : Spectroscopic analysis of rare earth ions doped nanomaterial
Abstract:
Rare Earth ions doped nanomaterial were prepared by chemical precipitation method and characterized by XRD, SEM, TEM and EDAX. Their absorption and fluorescence spectra have been recorded in UV-Visible and NIR region. The XRD study revealed the spherical wurtzite structure without second phase. The TEM images confirmed the spherical morphology of the nanomaterial with size in the quantum dots range. From absorption spectra various parameters i.e. Slater – Condon (Fk ), Racah (Ek ), Lande¢( z4f ) and Judd-Ofelt parameters have been computed for each nanomaterial specimen by using partial regression method taking into consideration all the absorption peaks observed. The spontaneous emission provability, Fluorescence branching ratio, Radiative lifetime and stimulated emission cross section have also been computed with help of fluorescence spectra.
Keywords: CdS nanomaterial, XRD, TEM, Absorption and Fluorescence Spectra
Biography:
Dr Sharma is working as Professor and Head, Department of Physics, Sri Dev Suman Uttarakhand University, Pt L.M.S. Campus Rishikesh (Dehradun) India. He obtained his Ph.D. degree from The University of Jodhpur. He has worked as Principal, Govt. Degree College Someshwar (Almora), Honorary Director, Deen Dayal Upadhyay Kaushal Kendra, Rudrapur, Senior Scientific Officer at Physics Department, I. I.T. New Delhi, Associate Professor, Assistant Professor at Department of Higher Education, Govt. of Uttarakhand and Assistant Professor at J.N.V. University, Jodhpur (Rajasthan). He was awarded DRDO fellowship for doctoral work and Young Scientist Project awarded by Department of Science and Technology, Govt of India, New Delhi. He is teaching physics for graduate and post graduate classes for last 25 years. He has completed four major research project funded by U.G.C. Govt of India, New Delhi and UCOST, Govt of Uttarakhand. Five students have been awarded Ph.D. degree and four others are pursuing research in rare earth doped nanomaterial.
Dr Sharma has to his credit three books for graduate students and study material in physics developed for Uttarakhand Open University Haldwani. He has participated in 50 International and National seminar and presented his papers. More than 60 research papers have been published in reputed national and international peer reviewed journals. He is reviewer of various Journals. He has organized three national conferences and two workshops sponsored by UGC, UOU and UCOST.
He has worked as an Executive member of National Committee of IAPT. He is also Life member of IAPT, IPA and Material Science Society.
