title: Fabrication of a photocontrolled surface with switchable wettability based on host-guest inclusion complexation and protein resistance.
abstract: A novel surface-modification strategy has been developed for the construction of a photocontrolled silicon wafer surface with switchable wettability based on host-guest inclusion complexation. The silicon wafer was first modified by guest molecule azobenzene (Azo) via a silanization reaction. Subsequently, a series of polymers with different polarities were attached to host molecule β-cyclodextrin (β-CD) to prepare β-CD-containing hemitelechelic polymers via click chemistry. Finally, a photocontrolled silicon wafer surface modified with polymers was fabricated by inclusion complexation between β-CD and Azo, and the surface properties of the substrate are dependent on the polymers we used. The elemental composition, surface morphology, and hydrophilic/hydrophobic property of the modified surfaces were characterized by X-ray photoelectron spectroscopy (XPS), atomic force microscope, and contact angle measurements, respectively. The antifouling property of the PEG-functionalized surface was evaluated by a protein adsorption assay using bovine serum albumin, which was also characterized by XPS. The results demonstrate that the surface modified with PEG possesses good protein-resistant properties.
authors: Shanghai Key Laboratory of Functional Materials Chemistry, East China University of Science and Technology , 130 Meilong Road, Shanghai 200237, China.
authors: Qiongxia
authors: Q
authors: Shen
authors: Lichao
authors: L
authors: Liu
authors: Weian
authors: W
authors: Zhang
mesh_terms: D000818:Animals; D001391:Azo Compounds / Q000737:chemistry; D002417:Cattle; D057930:Click Chemistry; D010316:Particle Size; D055668:Photochemical Processes; D012710:Serum Albumin, Bovine / Q000737:chemistry*; D012825:Silicon / Q000737:chemistry; D013499:Surface Properties; D017155:Wettability; D047392:beta-Cyclodextrins / Q000737:chemistry
chemical_list: D001391:Azo Compounds; D047392:beta-Cyclodextrins; D012710:Serum Albumin, Bovine; C009850:azobenzene; C031215:betadex; D012825:Silicon