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Preparation of DNA-immobilized magnetic particles and their utilization as an accumulative material of metal ions

  • Masanori Yamada (a1), Akira Fujisawa (a1), Kunimitsu Morishige (a1) and Eiji Hosono (a2)

Abstract

DNA-immobilized Fe3O4 particles (DNA–Fe-particles) were prepared by mixing DNA, magnetic Fe3O4 particles, and the silane coupling reagent, bis[3-(trimethoxysilyl)propyl]amine. The DNA–inorganic hybrid material was uniformly immobilized onto magnetic Fe3O4 particles with the diameters of approximately 450 nm. These DNA–Fe-particles were stable in water. Additionally, we could simply collect the DNA–Fe-particles by a magnet from an aqueous solution. Therefore, we demonstrated the accumulation of various metal ions, such as heavy and rare-earth metal ions, by the DNA–Fe-particles. As a result, although these DNA–Fe-particles could selectively accumulate heavy and rare-earth metal ions, these materials could not accumulate the light metal ions, such as Mg(II) and Ca(II) ions. Furthermore, the metal ion-accumulated DNA–Fe-particles could be recycled by washing them with an aqueous ethylenediaminetetraacetic acid solution.

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a) Address all correspondence to this author. e-mail: myamada@chem.ous.ac.jp

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Contributing Editor: Adrian B. Mann

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References

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Keywords

Preparation of DNA-immobilized magnetic particles and their utilization as an accumulative material of metal ions

  • Masanori Yamada (a1), Akira Fujisawa (a1), Kunimitsu Morishige (a1) and Eiji Hosono (a2)

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