A Robust Method for the Immobilization of Polymer Molecules on SiO2 Surfaces

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• 作者：G. K. Raghuraman ; R. Dhamodharan ; Oswald Prucker ; J&uuml ; rgen R&uuml ; he
• 刊名：Macromolecules
• 出版年：2008
• 出版时间：February 12, 2008
• 年：2008
• 卷：41
• 期：3
• 页码：873 - 878
• 全文大小：225K
• 年卷期：v.41,no.3(February 12, 2008)
• ISSN：1520-5835

文摘

In this work, we describe the use of hydridosilanes for the attachment of polymer monolayers toSiO₂ surfaces. In one approach, first a benzophenone group containing hydridosilane is self-assembled on theSiO₂ surface followed by photochemical attachment of polymer chains deposited onto the monolayer. In a secondapproach an ATRP initiator is self-assembled to the substrate surface, again using hydridosilane anchor groups.The surface-attached initiator groups are subsequently used for the growth of surface-attached polymer chains ina surface-initiated polymerization reaction. It is shown that, while chlorosilanes require rather stringent exclusionof moisture during self-assembly, the hydridosilanes are rather robust and functional monolayers are formedeven under ambient conditions. That in turn allows for the use of silanes in standard printing processes. In contrastto printing of chlorosilanes, which must be carried out under strictly anhydrous conditions, printing of hydridosilanesthus represents a simple and versatile technique for the generation of microstructured surfaces.