Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.jcis.2004.06.062
Title: Functionalization of hydrogen-terminated silicon via surface-initiated atom-transfer radical polymerization and derivatization of the polymer brushes
Authors: Xu, D.
Yu, W.H.
Kang, E.T. 
Neoh, K.G. 
Keywords: ATRP
Derivatization
Hydrogen-terminated Si(100)
Poly(ethylene glycol) monomethacrylate (PEGMA)
Issue Date: 1-Nov-2004
Source: Xu, D., Yu, W.H., Kang, E.T., Neoh, K.G. (2004-11-01). Functionalization of hydrogen-terminated silicon via surface-initiated atom-transfer radical polymerization and derivatization of the polymer brushes. Journal of Colloid and Interface Science 279 (1) : 78-87. ScholarBank@NUS Repository. https://doi.org/10.1016/j.jcis.2004.06.062
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 α-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. © 2004 Elsevier Inc. All rights reserved.
Source Title: Journal of Colloid and Interface Science
URI: http://scholarbank.nus.edu.sg/handle/10635/63960
ISSN: 00219797
DOI: 10.1016/j.jcis.2004.06.062
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