title: Spectroscopic investigations of Fe3+ doped poly vinyl alcohol (PVA) capped ZnSe nanoparticles.
abstract: Fe(3+) doped poly vinyl alcohol (PVA) capped ZnSe nanoparticles have been synthesized by using chemical method at room temperature. The prepared sample is characterized by X-ray diffraction, optical, photoluminescence (PL), electron paramagnetic resonance (EPR) and FT-IR techniques. Different physical parameters are evaluated by using measured values of refractive index and density. From the X-ray diffraction pattern, the average crystallite size is calculated by using Scherrer's formula and it is about 9 nm. Optical absorption spectrum reveals that the Fe(3+) ion enter into the lattice as octahedral symmetry. Crystal field (Dq) and inter-electronic repulsion parameters (B, C) are evaluated for Fe(3+) doped ZnSe nanoparticles as Dq=720, B=720 and C=2500 cm(-1). Photoluminescence spectrum of Fe(3+) doped ZnSe exhibits emission bands in UV and yellow regions. EPR spectrum showed various resonance signals at g=7.3, 3.5 and 2.0. FT-IR spectrum of Fe(3+) doped PVA capped ZnSe indicates the presence of O-H, C-H, C=C and C=O molecular groups.
authors.affiliation: Department of Physics, Andhra Loyola College, Vijayawada 520 008, India.
authors.forename: Sk
authors.initials: S
authors.lastname: Muntaz Begum
authors.forename: M C
authors.initials: MC
authors.lastname: Rao
authors.forename: Y
authors.initials: Y
authors.lastname: Aparna
authors.forename: P S
authors.initials: PS
authors.lastname: Rao
authors.forename: R V S S N
authors.initials: RV
authors.lastname: Ravikumar
mesh_terms: D002412:Cations / Q000737:chemistry; D004578:Electron Spin Resonance Spectroscopy; D007501:Iron / Q000737:chemistry*; D049449:Luminescence; D053758:Nanoparticles / Q000737:chemistry*; D011142:Polyvinyl Alcohol / Q000737:chemistry*; D012031:Refractometry; D018036:Selenium Compounds / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D014961:X-Ray Diffraction; D017967:Zinc Compounds / Q000737:chemistry*
chemical_list: D002412:Cations; D018036:Selenium Compounds; D017967:Zinc Compounds; D011142:Polyvinyl Alcohol; D007501:Iron; C044696:zinc selenide