Journal of Materials Research

Articles

Formation of maghemite nanoparticles in bismuth telluride materials containing iron

R.M. Catchings III, A.N. Thorpe, J.R. Grant c1, R. Douglasa1, C. Viragha2, M.A. Adel-Hadadia3, K. Gaskella4 and A. Barkatta5

a1 Department of Physics and Astronomy, Howard University, Washington, District of Columbia 20059

a2 Vitreous State Laboratory, The Catholic University of America, Washington, District of Columbia 20064

a3 Department of Chemistry, The Catholic University of America, Washington, District of Columbia 20064

a4 Department of Chemistry, University of Maryland–College Park, College Park, Maryland 20742

a5 Department of Chemistry, The Catholic University of America, Washington, District of Columbia 20064

Abstract

Bismuth telluride (Bi2Te3) systems containing 2%, 4%, and 8% of iron were prepared using a low temperature wet chemical method. Iron oxide nanoparticles were formed when the samples were heated in hydrogen at 250 °C for at least six hours. The samples were characterized by x-ray diffraction, magnetization, magnetic susceptibility, x-ray photoelectron spectroscopy, Mössbauer spectroscopy, and wet chemical analysis measurements. The nanoparticles of iron oxide were identified as γ-Fe2O3 with a particle size of ˜5 nm.

(Received April 07 2010)

(Accepted May 20 2010)

Key Words:

  • Bi;
  • Te;
  • Nanoscale

Correspondence:

c1 Address all correspondence to this author. e-mail: jgrant@howard.edu

0Comments