Novel Bifuncitonal One-Dimensional Fe3O4/Se Nanocomposites via Facile Green Synthesis

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• 作者：Wensheng Lu ; Yuhua Shen ; Anjian Xie ; Xiuzhen Zhang ; Wengui Chang
• 刊名：Journal of Physical Chemistry C
• 出版年：2010
• 出版时间：March 25, 2010
• 年：2010
• 卷：114
• 期：11
• 页码：4846-4851
• 全文大小：301K
• 年卷期：v.114,no.11(March 25, 2010)
• ISSN：1932-7455

文摘

Novel uniform straw-like Fe₃O₄/Se one-dimensional (1D) nanoplank bundles have been successfully prepared by a facile and green glucose-reducing method at gentle temperature for the first time. The width, thickness, and length of as-prepared Fe₃O₄/Se nanoplanks can be observed at the range of 300−400 nm, 50 nm, and 6−8 μm, respectively. Fe₃O₄ nanoparticles may act as seeds and catalytic agents for the formation of the bifunctional nanocomposites. The products bear both fluorescent and superparamagnetic properties. More importantly, quantum size effect in optical properties, which is reflected by a marked blue shift of the band gap and direct transitions relative to the values of bulk t-Se, can be observed. The mechanism of formation can be described as the linear aggregation and growth of Fe₃O₄/Se nanospheres and the self-assembly of 1D Fe₃O₄/Se nanoplanks. The strawlike Fe₃O₄/Se can be potentially converted to a series of bifunctional nanocomposites (e.g., Fe₃O₄/Ag₂Se, Fe₃O₄/Bi₂Se₃, and Fe₃O₄/CdSe) with special morphology via the sacrificing template method. This method might provide a new, mild, and economical concept for the synthesis and construction of nanowires, nanobelts, nanorods, and some other kinds of 1D nanostructures. Moreover, this novel bifunctional nanocomposites will open up a potential and broad application in microelectronics, biology, and medicine.