Functionalization of hydrogen-terminated silicon via surface-initiated atom-transfer radical polymerization and derivatization of the polymer brushes

Journal of Colloid and Interface Science
D XuK G Neoh

Abstract

Surface-initiated atom-transfer radical polymerization (ATRP) of poly(ethylene glycol) monomethacrylate (PEGMA) was carried out on the hydrogen-terminated Si(100) substrates with surface-tethered alpha-bromoester initiator. Kinetic studies confirmed an approximately linear increase in polymer film thickness with reaction time, indicating that chain growth from the surface was a controlled "living" process. The "living" character of the surface-grafted PEGMA chains was further ascertained by the subsequent extension of these graft chains, and thus the graft layer. Well-defined polymer brushes of near 100 nm in thickness were grafted on the Si(100) surface in 8 h under ambient temperature in an aqueous medium. The hydroxyl end groups of the poly(ethylene glycol) (PEG) side chains of the grafted PEGMA polymer were derivatized into various functional groups, including chloride, amine, aldehyde, and carboxylic acid groups. The surface-functionalized silicon substrates were characterized by reflectance FT-IR spectroscopy and X-ray photoelectron spectroscopy (XPS). Covalent attachment and derivatization of the well-defined PEGMA polymer brushes can broaden considerably the functionality of single-crystal silicon surfaces.

References

Dec 20, 1996·Science·G FytasC Toprakcioglu
Dec 26, 2001·Chemical Reviews·K Matyjaszewski, J Xia
May 9, 2002·Chemical Reviews·Jillian M Buriak

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Citations

Mar 10, 2006·The European Physical Journal. E, Soft Matter·K MallickM S Scurrell
Apr 29, 2015·Journal of Colloid and Interface Science·Shanshan GuoKoon Gee Neoh
Oct 23, 2012·Langmuir : the ACS Journal of Surfaces and Colloids·Michael K F LoHarold G Monbouquette
Sep 25, 2017·Journal of Colloid and Interface Science·Ishan A FursuleBrad J Berron
Jul 9, 2008·Langmuir : the ACS Journal of Surfaces and Colloids·Volker StadlerF Ralf Bischoff
Oct 10, 2019·Biomacromolecules·Jian WangHarm-Anton Klok

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