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Functionalization of Gold and Silicon Surfaces by Copolymer Brushes Using Surface-Initiated ATRP

✍ Scribed by Ekaterina Rakhmatullina; Thomas Braun; Thomas Kaufmann; Hannes Spillmann; Violeta Malinova; Wolfgang Meier

Publisher
John Wiley and Sons
Year
2007
Tongue
English
Weight
305 KB
Volume
208
Category
Article
ISSN
1022-1352

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✦ Synopsis

Abstract

Surface‐initiated ATRP was used for step‐by‐step growth of poly(butyl methacrylate)‐co‐poly(2,2‐dimethylaminoethyl methacrylate) (PBMA‐co‐PDMAEMA) brushes from gold and silicon substrates. A one‐step procedure was found to have high efficiency for initiator anchoring. The polymer brushes were characterized in situ by contact angle measurements, ellipsometry, and X‐ray photoelectron spectroscopy (XPS). Detachment of the polymer brushes from both substrates allowed an exact determination of molecular weight and polydispersity indexes given by GPC. ^1^H NMR confirmed the chemical structure of the detached brushes. Comparison of theoretical predictions and experimental data showed that the first PBMA block had a folded conformation while copolymerization of the second DMAEMA induced stretching of the brushes.

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