title: Surfactant assisted control on optical, fluorescence and phonon lifetime in α-Bi2O3 microrods.
abstract: We report preparation of pure and surfactant added α-Bi2O3 microrods through simple chemical method at moderate temperature. Cetyltrimethyl ammonium bromide (CTAB) is used as a surfactant. X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier Transform Infrared (FTIR) spectroscopy, Raman spectroscopy, UV-Vis absorption and photoluminescence (PL) measurements were carried out to understand the effect of surfactant (CTAB) on structural, phonon and optical properties of the prepared material. It is observed that the crystallite size, optical band gap and the structural defects (oxygen vacancies) decreases due to the effect of surfactant. Raman spectral studies exhibit various phonon modes of Bi2O3 and also decrease in the FWHM of the phonon modes is observed after the addition of CTAB.
authors.affiliation: Department of Physics, National Institute of Technology, Tiruchirappalli 620 015, India.
authors.forename: S
authors.initials: S
authors.lastname: Hariharan
authors.affiliation: Department of Physics, National Institute of Technology, Tiruchirappalli 620 015, India.
authors.forename: R
authors.initials: R
authors.lastname: Udayabhaskar
authors.affiliation: Indira Gandhi Centre for Atomic Research, Kalpakkam 603 102, India.
authors.forename: T R
authors.initials: TR
authors.lastname: Ravindran
authors.affiliation: Department of Physics, National Institute of Technology, Tiruchirappalli 620 015, India. Electronic address: bkarthik@nitt.edu.
authors.forename: B
authors.initials: B
authors.lastname: Karthikeyan
keywords: Fluorescence properties; Phonon lifetime; Surface defects