Synthesis and magnetic properties of CuCr2S4 chalcospinel nanocrystals using single-source precursors

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:539

Article

Afkhami, Farhad Akbari¹  Singh, Amit¹  Gupta, Arunava¹ 

[1] Univ Alabama, Dept Chem & Biochem, Box 870336,250 Hackberry Lane, Tuscaloosa, AL 35487 USA

关键词: Magnetic thiospinel;    Single-source precursor;    Colloidal synthesis;    Hot-injection;   

DOI  :  10.1016/j.jmmm.2021.168338

来源: Elsevier

【 摘 要 】

Magnetic thiospinel CuCr2S4 nanocrystals (NCs) have been synthesized via hot-injection (HI) method using metal-complexes of diethyl dithiocarbamate (DDTC) and 1-dodecanethiol (1-DDT) as the precursors. The single-source precursor's effect on the composition, crystallinity, and structure of the products is studied. Moreover, the influence of various process parameters, such as reaction time and temperature, capping ligand, and precursor on the crystalline phase, shape, and size of the NCs is systematically investigated. The morphological changes and magnetic properties of the NCs are also examined. The synthesized materials have been analyzed and characterized using X-ray diffraction, TEM, HRTEM, HAADF-STEM, and EDS-STEM. The results reveal the formation of uniform NCs of CuCr2S4 along with appearance of a trace amount of sulfur. The presence of sulfur in the structure of the organic ligand DDTC likely facilitates formation of the sulfur impurity. Our results indicate that controlling the formation of pure-phase nanoparticles using metal-DDTC precursors is more challenging than using simple metal salts reported earlier. Nevertheless, this work is the first successful effort in preparing NCs of CuCr2S4 employing single-source precursors.

【 授权许可】

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