Immobilization of Functional Oxide Nanoparticles on Silicon Surfaces via Si–C Bonded Polymer Brushes

Authors: Xu, F.J.; Wuang, S.C.; Zong, B.Y.; Kang, E.T.; Neoh, K.G.

Source: Journal of Nanoscience and Nanotechnology, Volume 6, Number 5, May 2006 , pp. 1458-1463(6)

Publisher: American Scientific Publishers

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Abstract:

A method for immobilizing and mediating the spatial distribution of functional oxide (such as SiO₂ and Fe₃O₄) nanoparticles (NPs) on (100)-oriented single crystal silicon surface, via Si–C bonded poly(3-(trimethoxysilyl)propyl methacrylate) (P(TMSPM)) brushes from surface-initiated atom transfer radical polymerization (ATRP) of (3-(trimethoxysilyl)propyl methacrylate) (TMSPM), was described. The ATRP initiator was covalently immobilized via UV-induced hydrosilylation of 4-vinylbenzyl chloride (VBC) with the hydrogen-terminated Si(100) surface (Si–H surface). The surface-immobilized Fe₃O₄ NPs retained their superparamagnetic characteristics and their magnetization intensity could be mediated by adjusting the thickness of the P(TMSPM) brushes.

Keywords: NANOPARTICLES; IMMOBILIZATION; 3-(TRIMETHOXYSILYL)PROPYL METHACRYLATE; ATRP. FE3O4

Document Type: Research article

DOI: 10.1166/jnn.2006.313

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