title: Biomimetic anchors applied to the host-guest antifouling functionalization of titanium substrates.
abstract: A biomimetic strategy was developed for the construction of antifouling titanium oxide (Ti(oxide)) surfaces based on host-guest interactions. Two catecholic derivatives, dopamine 4-(phenylazo)benzamide (AZODopa) and dopamine 1-adamantanecarboxamide (AdaDopa) were synthesized and immobilized onto the Ti(oxide) surfaces. The guest molecules-anchored Ti(oxide) surfaces were further functionalized with zwitterionic heptakis[6-deoxy-6-(N-3-sulfopropyl-N,N-dimethylammonium ethyl sulfanyl)]-β-cyclodextrin (SBCD) and hydrophilic β-CD polymer (CDP). The surface elemental compositions and hydrophobic/hydrophilic properties of the Ti(oxide) surfaces before and after modification were characterized by X-ray photoelectron spectroscopy (XPS) and static water contact angle measurements, respectively. The antifouling properties of the modified Ti(oxide) surfaces were evaluated by the protein adsorption and bacterial adhesion assays. The zwitterionic SBCD- and hydrophilic CDP-functionalized Ti(oxide) surfaces can reduce the adsorption of bovine plasma fibrinogen and adhesion of Escherichia coli, as compared to the pristine and guest molecules-anchored Ti(oxide) surfaces.
authors.affiliation: Institute for Clean Energy and Advanced Materials, Faculty of Materials and Energy, Southwest University, Chongqing 400715, PR China; Chongqing Key Laboratory for Advanced Materials and Technologies of Clean Energies, Southwest University, Chongqing 400715, PR China.
authors.forename: Xiao Yan
authors.initials: XY
authors.lastname: Cai
authors.affiliation: Institute for Clean Energy and Advanced Materials, Faculty of Materials and Energy, Southwest University, Chongqing 400715, PR China; Chongqing Key Laboratory for Advanced Materials and Technologies of Clean Energies, Southwest University, Chongqing 400715, PR China.
authors.forename: Ning Ning
authors.initials: NN
authors.lastname: Li
authors.affiliation: Institute for Clean Energy and Advanced Materials, Faculty of Materials and Energy, Southwest University, Chongqing 400715, PR China; Chongqing Key Laboratory for Advanced Materials and Technologies of Clean Energies, Southwest University, Chongqing 400715, PR China.
authors.forename: Jiu Cun
authors.initials: JC
authors.lastname: Chen
authors.affiliation: Department of Chemical & Biomolecular Engineering, National University of Singapore, Kent Ridge, Singapore 117576, Singapore.
authors.forename: En-Tang
authors.initials: ET
authors.lastname: Kang
authors.affiliation: Institute for Clean Energy and Advanced Materials, Faculty of Materials and Energy, Southwest University, Chongqing 400715, PR China; Chongqing Key Laboratory for Advanced Materials and Technologies of Clean Energies, Southwest University, Chongqing 400715, PR China. Electronic address: xulq@swu.edu.cn.
authors.forename: Li Qun
authors.initials: LQ
authors.lastname: Xu
mesh_terms: D000327:Adsorption; D001422:Bacterial Adhesion; D057219:Biofouling / Q000517:prevention & control*; D040761:Biomimetic Materials / Q000737:chemistry*; D004926:Escherichia coli / Q000737:chemistry* / Q000166:cytology; D015394:Molecular Structure; D010316:Particle Size; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*
chemical_list: C009495:titanium dioxide; D014025:Titanium
keywords: Antifouling; Biomimetic anchors; Catechol; Cyclodextrin; Host-guest interaction