One-step synthesis of colloidal Mn<Subscript>3</Subscript>O<Subscript>4</Subscript> and γ-Fe<Subscript>2</Subscript>O<Subscript>3</Subscript> nanoparticles at room temperature期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

One-step synthesis of colloidal Mn3O4 and γ-Fe2O3 nanoparticles at room temperature

Authors:	Shuijin Lei Kaibin Tang Zhen Fang Jie Sheng

Affiliation:	(1) School of Materials Science and Engineering, Nanchang University, Nanchang, Jiangxi, 330031, P. R. China;(2) Nanomaterial and Nanochemistry, Hefei National Laboratory for Physical Sciences at Micro-scale, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China

Abstract:	A facile room-temperature synthesis has been developed to prepare colloidal Mn₃O₄ and γ-Fe₂O₃ nanoparticles (5 to 25 nm) by an ultrasonic-assisted method in the absence of any additional nucleation and surfactant. The morphology of the as-prepared samples was observed by transmission electron microscopy. High-resolution transmission electron microscopy observations revealed that the as-synthesized nanoparticles were single crystals. The magnetic properties of the samples were investigated with a superconducting quantum interference device magnetometer. The possible formation process has been proposed.

Keywords:	one-step synthesis colloidal nanoparticles Mn₃O₄ γ -Fe₂O₃ ultrasonic-assisted method magnetic properties metal oxide nanoparticles
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