Magnetic field induced controllable self-assembly of maghemite nanocrystals: From 3D arrays to 1D nanochains

• DOI: 10.1016/j.apsusc.2015.04.066
• Publication Date: 2015-04-18T04:27:53Z
• Authors: Yan Tang; Qianwang Chen; Rongsheng Chen
• Keywords: 02 engineering and technology; 0210 nano-technology

Abstract A hydrothermal process has been used to synthesize walnut-like maghemite superstructures which can be further self-assembled in a controllable manner into ordered three-dimensional (3D) architectures and one-dimensional (1D) nanochains in the presence of different external magnetic field. The assembly behavior of the maghemite nanoparticles isclosely related to the van der Waals interactions and external-field-induced magnetic dipole interactions. The magnetic properties of these nanostructures are also investigated.