Long Fe3O4 nanowires decorated by CdTe quantum dots: Synthesis and magnetic–optical properties
Xianmei Lana, Xuebo Cao, a, , Wenhu Qiana, Weijian Gaoa, Cui Zhaoa and Yang Guoa
aKey Laboratory of Organic Synthesis of Jiangsu Province, Department of Chemistry, Suzhou University, Suzhou, Jiangsu 215123, PR China Received 29 March 2007; revised 30 May 2007; accepted 10 June 2007. Available online 16 June 2007.
This work describes the synthesis and magnetic–optical properties of Fe3O4 nanowires decorated by CdTe quantum dots. The composite nanowires with a length of 1 μm and an average diameter of 23±3 nm were prepared in a high yield through the preferential growth of Fe3O4 on CdTe quantum dots using ethylenediamine as template. Their growth mechanism was discussed based on the results of control experiments. Studies on the optical and magnetic properties of the composite nanowires reveal that they assume not only yellow-green emission feature but also room temperature ferromagnetism.
The long and flexible CdTe quantum dots-decorated Fe3O4 nanowires assume not only room temperature ferromagnetism but also strong luminescent effect.