Preparation of DNA-immobilized magnetic particles and their utilization as an accumulative material of metal ions. Issue 3 (12th February 2016)

• Record Type: Journal Article
• Authors: Yamada, Masanori; Fujisawa, Akira; Morishige, Kunimitsu; Hosono, Eiji
• Is Part Of: Journal of materials research. Volume 31:Issue 3(2016)
• Page Start: 360
• Page End: 369
• Publication Date: 2016-02-12
• Subjects: composite, -- environmentally benign, -- polymer; Materials -- Research -- Periodicals; 620.1105
• DOI: 10.1557/jmr.2016.14
• Languages: English
• ISSNs: 0884-2914

Abstract

Abstract: Abstract : DNA-immobilized Fe3 O4 particles (DNA–Fe-particles) were prepared by mixing DNA, magnetic Fe3 O4 particles, and the silane coupling reagent, bis[3-(trimethoxysilyl)propyl]amine. The DNA–inorganic hybrid material was uniformly immobilized onto magnetic Fe3 O4 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.