Synthesis of dense poly(acrylic acid) brushes and their interaction with amine-functional silsesquioxane nanoparticles.
Synthesis of dense poly(acrylic acid) brushes and their interaction with amine-functional silsesquioxane nanoparticles.
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DOI：
10.1021/la8009767
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发表时间：
2008-09
期刊：
影响因子：
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通讯作者：
M. Retsch;A. Walther;K. Loos;A. Müller
中科院分区：
文献类型：
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作者：
M. Retsch;A. Walther;K. Loos;A. Müller
采用表面引发原子转移自由基聚合法（SI-ATRP）在金表面上合成了聚丙烯酸刷。使用了三种类型的单层，每个起始单元具有不同数量的硫醇结合位点。金表面的结合强度被证明是至关重要的酸性水解后形成均匀的刷层。的单分子膜和聚合物刷，其特征在于通过椭圆偏振仪，红外光谱，水接触角测量，原子力显微镜，和X射线光电子能谱。利用表面等离子体共振研究了它们与[（二甘氨酰氨基）丙基]倍半硅氧烷纳米粒子在不同pH值下的相互作用。
Poly(acrylic acid) polyelectrolyte brushes were synthesized by surface-initiated atom transfer radical polymerization (SI-ATRP) of tert-butyl acrylate on planar gold surfaces and subsequent hydrolysis. Three types of monolayers with different numbers of thiol binding sites per initiating unit were used. The binding strength to the gold surface turned out to be of crucial importance for the formation of uniform brush layers after acidic hydrolysis. The monolayers and polymer brushes were characterized by ellipsometry, infrared spectroscopy, water contact angle measurements, atomic force microscopy, and X-ray photoelectron spectroscopy. Their interaction with [(diglycidylamino)propyl]silsesquioxane nanoparticles at various pH values was studied by surface plasmon resonance.