Sanyal Amitav, Norsten Tyler B, Uzun Oktay, Rotello Vincent M
Department of Chemistry, University of Massachusetts, Amherst, Massachusetts 01003, USA.
Langmuir. 2004 Jul 6;20(14):5958-64. doi: 10.1021/la049737i.
Diblock copolymers containing recognition units designed to participate in specific three-point hydrogen bonding were adsorbed onto modified gold surfaces. Self-assembled monolayers (SAMs) containing complementary recognition units were used to direct the adsorption process. The polymer-modified surfaces obtained were characterized using X-ray photoelectron spectroscopy, water contact angle, and ellipsometry. The role of individual block lengths on the adsorption process was followed by observing frequency changes of thymine-SAM-modified quartz crystal microbalance chips during adsorption of diamidopyridine-functionalized polymers from a nonpolar solvent. The renewable nature of these recognition unit functionalized surfaces was demonstrated by reversible binding of polymers. Adsorption onto fresh surfaces, followed by desorption and subsequent readsorption of monoblock and diblock copolymers was also investigated.
含有设计用于参与特定三点氢键的识别单元的二嵌段共聚物被吸附到改性金表面。含有互补识别单元的自组装单分子层（SAMs）用于指导吸附过程。使用X射线光电子能谱、水接触角和椭偏仪对获得的聚合物改性表面进行表征。通过观察二氨基吡啶功能化聚合物从非极性溶剂吸附过程中胸腺嘧啶-SAM改性石英晶体微天平芯片的频率变化，研究了各个嵌段长度对吸附过程的作用。聚合物的可逆结合证明了这些识别单元功能化表面的可再生性质。还研究了在新鲜表面上的吸附，随后的解吸以及单嵌段和二嵌段共聚物的后续再吸附。
