Surfactant-assisted synthesis of Cd1-xCoxS nanocluster alloys and their structural, optical and magnetic properties

JOURNAL OF ALLOYS AND COMPOUNDS

卷:493

Article

Sathyamoorthy, R.¹  Sudhagar, P.¹  Balerna, A.²  Balasubramanian, C.³  Bellucci, S.²  Popov, A. I.^4,5  Asokan, K.⁶ 

[1] Kongunadu Arts & Sci Coll, R&D Dept Phys, Coimbatore 641029, Tamil Nadu, India

[2] Ist Nazl Fis Nucl, Lab Nazl Frascati, Frascati, Italy

[3] Inst Plasma Res, Facilitat Ctr Ind Plasma Technol, Bhat 382428, Gandhinagar, India

[4] Latvian State Univ, Inst Solid State Phys, LV-1063 Riga, Latvia

[5] Inst Laue Langevin, F-38042 Grenoble 9, France

[6] Inter Univ, Accelerator Ctr, New Delhi 110067, India

关键词: Nanoclusters;    Diluted magnetic semiconductors;    Electronic structure;    CdS;   

DOI  :  10.1016/j.jallcom.2009.12.063

来源: Elsevier

【 摘 要 】

We report the synthesis of Co-doped CdS nanoclusters (Cd1-xCoxS) for different doping concentrations (x = 0.10, 0.20 and 0.30) and characterization of their structural, optical, and magnetic properties. The structural properties studied by X-ray diffraction revealed hexagonal-greenockite structure and a decrease of the lattice parameters (a and c) with doping, showing incorporation of Co in the lattice. The morphology of the nanoclusters was studied by scanning electron microscopy. The optical absorption studies, using diffused reflectance spectroscopy, revealed that Co doping modifies the absorption band edge. Ferromagnetic phase was observed in the magnetization measurements at room-temperature due to high carrier concentration. X-ray absorption near edge fine structure measurements at the sulfur (S) K-edge of the Co-doped samples revealed that the valence remains divalent and that there are some changes with Co doping in the spectral intensity. (C) 2009 Elsevier B.V. All rights reserved.

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