Optical and Electron Paramagnetic Resonance Spectroscopies of Mn-Doped PbS Nanocrystals

Author

Silva, R.S. ; Morais, P.C. ; Sullasi, H.S.L. ; Ayta, W.E.F. ; Qu, Fanyao ; Dantas, N.O.

Author_Institution

Instituto de Fisica, Brasilia Univ.

Volume

43

Issue

6

fYear

2007

fDate

6/1/2007 12:00:00 AM

Firstpage

3124

Lastpage

3126

Abstract

Mn-doped PbS nanocrystals (NCs) (Pb₁-xMn_xS) embedded in glass matrix have been successfully synthesized by means of fusion method. The geometrical morphology and size dispersion of Pb_1-xMn_xS NCs were studied by atomic force microscopy (AFM). Their magnetic and the optical properties have been investigated using electron paramagnetic resonance (EPR) and optical absorption (OA) measurements. We found that the isolated Mn²⁺-ions are located on the PbS NC-shell whereas coupled Mn ²⁺-ions are located on the Pb_1-xMn_xS NC-core

Keywords

atomic force microscopy; infrared spectra; lead compounds; manganese compounds; nanostructured materials; paramagnetic resonance; semimagnetic semiconductors; ultraviolet spectra; visible spectra; Pb_1-xMn_xS; atomic force microscopy; electron paramagnetic resonance spectra; geometrical morphology; nanocrystals; optical spectra; size dispersion; Atom optics; Atomic force microscopy; Atomic measurements; Electron optics; Geometrical optics; Glass; Morphology; Nanocrystals; Paramagnetic resonance; Spectroscopy; Glass; Mn-doped; PbS; quantum dots;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2007.893852

Filename

4202915