Fabrication of a Photocontrolled Surface with Switchable Wettability Based on Host–Guest Inclusion Complexation and Protein Resistance

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. Subseq...

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Veröffentlicht in:Langmuir 2014-08, Vol.30 (31), p.9361-9369
Hauptverfasser: Shen, Qiongxia, Liu, Lichao, Zhang, Weian
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creator Shen, Qiongxia
Liu, Lichao
Zhang, Weian
description 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.
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subjects Animals
Azo Compounds - chemistry
beta-Cyclodextrins - chemistry
Cattle
Click Chemistry
Particle Size
Photochemical Processes
Serum Albumin, Bovine - chemistry
Silicon - chemistry
Surface Properties
Wettability
title Fabrication of a Photocontrolled Surface with Switchable Wettability Based on Host–Guest Inclusion Complexation and Protein Resistance
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