Authors: Huang, Xiaoying; Heulings, Harry R.; Li, Jing; Yuen, Tan; Lin, C.L.

Source: Journal of Nanoscience and Nanotechnology, Volume 5, Number 9, September 2005 , pp. 1487-1491(5)

Publisher: American Scientific Publishers

Abstract:

Inorganic–organic hybrid nanostructures doped with magnetic ions have been synthesized via substitution of Zn by Co or Fe in the ZnSe(L)_0.5 systems under solvothermal conditions. These dilute magnetic semiconductors (DMS), Zn_1-xM_xSe(L)_0.5 (M = Co, Fe; L = ethylenediamine or en, 1,3-propanediamine or pda; 0 < x < 1), are composed of perfectly ordered Zn_1-xM_xSe semiconductor monolayers interconnected by organic diamine molecules. The large blue shifts in their optical absorption edges (1.1–1.5 eV) compared to the bulk ZnSe are a direct result of a very strong quantum confinement effect (QCE). Magnetic studies show that there exist antiferromagnetic interactions between the Co or Fe centers in the structures and the interaction is enhanced as the doping concentration increases. The introduction of Fe or Co to hybrid inorganic–organic semiconductors provides a promising route to generate materials that combine the advantageous features of inorganic, organic, and magnetic functionalities in a single structure.

Keywords: DILUTE MAGNETIC SEMICONDUCTOR; INORGANIC-ORGANIC HYBRID MATERIAL; NANOSTRUCTURE; QUANTUM CONFINEMENT EFFECT; ANTIFERROMAGNETIC INTERACTION

Document Type: Research article

DOI: http://dx.doi.org/10.1166/jnn.2005.321

Publication date: 2005-09-01

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