Mesoporous concentric magnetic FePt core-shells nanoparticle with functionalized surfaces for capturing metal ions and DNA molecules

Tang, H.L., Qian, Y.Q., Ren, Y., Chen, H.Y., Jones, I.M., Yue, B., He, H.Y. and Tsang, S.C. (2009) Mesoporous concentric magnetic FePt core-shells nanoparticle with functionalized surfaces for capturing metal ions and DNA molecules. Journal of Nanoscience and Nanotechnology, 9 (8). pp. 4604-4610. ISSN 1533-4880 doi: 10.1166/jnn.2009.1212

Abstract/Summary

It is demonstrated that monodisperse magnetic FePt nanoparticle can be engineered into a protective dense silica layer, followed by concentric outer mesoporous silica layers with tailored -SH, -SO3H and -NH2 surface groups, these new materials can be used to capture heavy metal ions and DNA molecules from solution specifically by their internal or/and external functionalised surfaces by magnetic means.