Volume 77, Number 6, March 2007
|Number of page(s)||6|
|Section||Interdisciplinary Physics and Related Areas of Science and Technology|
|Published online||01 March 2007|
Magnetic-field-induced chain-like assembly structures of nanoparticles
State Key Laboratory of Optoelectronic Materials and Technologies, and School of Physics and Engineering, Sun Yat-sen University - Guangzhou, 510275, PRC
Corresponding author: email@example.com
Accepted: 26 January 2007
By controlling the time to apply magnetic field to a magnetic fluid with polymer acrylic resin and by evaporating the solvent, linear chain-like structures were obtained and fixed. Optical microscopy and transmission electronic microscopy (TEM) were used to observe the assembly structures of the fixed magnetic nanoparticles. We found that the chain-like structures with size even down to hundreds nanometers had smaller substructures. A picture of aggregation between linear chain-like substructures is proposed to understand the formation of the macrostructure in magnetic fluid induced by a magnetic field. Two basic aggregations, the coarsening and the connection of the substructures, were observed.
PACS: 81.16.Dn – Self-assembly / 75.50.Mm – Magnetic liquids / 82.35.-x – Polymers: properties; reactions; polymerization
© Europhysics Letters Association, 2007
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