Effect of Dispersant on Preparation of Colloidal Magnetite Nanocrystals

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概要

• 論文の詳細を見る

• Nanometer scale magnetite particles were prepared in a very low concentration dispersing system with a dispersant. The average size of the particles prepared under optimum conditions was determined by transmission electron microscopy to be approximately 1.8 nm. The magnetic properties were investigated using a superconducting quantum interference device (SQUID) magnetometer. The dried samples exhibited approximately superparamagnetic behavior. Rhelogical property measurement shows that the colloidal magnetite both with and without polyurethane reveals shear thinning. The surface morphology of the films of the magnetite nanoparticles on the glass, as shown by atomic force microscopy (AFM) images, produces well-formed surface structures that are evenly spaced by the magnetite nanoparticles. It also shows that this is an effective method of surface modification for nanometer scale magnetite.

• 2006-07-15

著者

• Chao Chuen-guang

  Department Of Material Sciences And Engineering National Chiao Tung University

• Shauo Chang-neng

  Department Of Materials Science And Engineering National Chiao Tung University

• Chao Chuen-Guang

  Department of Materials Science and Engineering, National Chiao Tung University, 1001 Ta Hsueh Road, Hsinchu, Taiwan 300, R.O.C.

• Shauo Chang-Neng

  Department of Materials Science and Engineering, National Chiao Tung University, 1001 Ta Hsueh Road, Hsinchu, Taiwan 300, R.O.C.

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