Nano Archive

Fe3O4 octahedral colloidal crystals

Meng, L-r and Chen, Weimeng and Tan, Yiwei and Zou, Lin and Chen, Chinping and Zhou, Heping and Peng, Qing and Li, Yadong (2011) Fe3O4 octahedral colloidal crystals. Nano Research, 4 (4). pp. 370-375. ISSN 1998-0124 (Print) 1998-0000 (Online)

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We present a facile and controllable method for the large-scale fabrication of highly-ordered octahedral Fe3O4 colloidal single crystals without the assistance of a substrate. Oleic acid is used to reduce the solubility of the nano-building blocks in colloidal solution and to induce a crystallization process. Our colloidal crystals are of multimicron size and show typical crystallographic characteristics. They have a very robust structure and can serve as a novel ordered magnetic mesoporous material with a relatively narrow pore size distribution. The sample possesses an extremely high Verwey transition temperature (TV) of 100 K and a high saturation magnetization (MS) of 86 emu/g at 5 K based on its good crystallinity, as well as the interparticle dipolar interaction behavior arising from its unique structure. Electrochemical measurements have demonstrated the excellent capacity of the mesoporous colloidal crystals when used in lithium-ion batteries.

Item Type:Article
Subjects:Material Science > Nanostructured materials
ID Code:10691
Deposited By:M T V
Deposited On:09 May 2011 10:10
Last Modified:09 May 2011 10:10

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