writer：Hang Bian, Xiaozhe Dong, Shanshan Chen, Dewen Dong, Ning Zhang
keywords：polymer brushes, stable Si-C bond, silicon substrate
source：期刊
specific source：Chinese Chemical Letters
Issue time：2018年
We demonstrate a straightforward and efficient method for the creation of polymer brushes on hydrogen-terminated silicon substrates through the UV-induced photopolymerization. The surface grafting polymerization is applicable to a series of monomers, allowing the direct formation of homogeneous polymer coatings ranging from hydrophilic poly(2-isopropenyl-2-oxazoline) (PIPOx), amphiphilic poly( N -isopropyl acrylamide) (PNIPAM), to hydrophobic polystyrene (PS) and poly(4-(1 H ,1 H ,2 H ,2 H -perfluorohexyl)oxymethylstyrene) (PPHMS) on Si(100) and Si(111) surfaces via stable Si-C bonds. Polymerization kinetic investigation indicates a linear increase of polymer layer thickness with the polymerization time. Moreover, the as-prepared polymer brushes exhibits superior stability against basic conditions in contrast to those that were formed on silicon substrates via conventional Si-O-C bond.