Title |
A magnetic separation study on synthesis of magnetic
Fe oxide core/Au shell nanoparticles
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Author |
Q.H. LU1,2, K.L. YAO1,*, D. XI3, Z.L. LIU1, X.P. LUO3, Q. NING3 |
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Institute
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1. Department of Physics, Huazhong University of Science and Technology, Wuhan 430074, P.R.China;
2. Department of Physics, Guangxi University, Nanning 530004, P.R.China; 3. Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, P.R.China. |
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Keywords:
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core-shell structure; composite nanoparticles; high-gradient magnetic filtration; magnetic separation; biological applications |
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| Abstract | With the aid of high-gradient magnetic filtration, we investigate in this paper influence of the synthetic conditions on the product Fe oxide core/Au shell nanoparticles. For samples prepared under various conditions, the particles of gold character were separated, and the relative proportion of particles that filtered out from the column is found to vary from sample to sample, with close relations to the seed concentration and citrate to Au3+ mole ratio adopted in reaction. To explain this variation, the seed concentration is believed to play a key role on minimizing the fraction of pure Au nanoparticles, while the citrate to Au3+ mole ratio affects mainly the mean thickness of gold shell of the product composite nanoparticles. |
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