title: Light-responsive smart surface with controllable wettability and excellent stability.
abstract: Novel fluorinated gradient copolymer was designed for smart surface with light-responsive controllable wettability and excellent stability. The switchable mechanism and physicochemical characteristics of the as-prepared surface decorated by designed polymeric material were investigated by ultraviolet-visible (UV-vis) spectrum, scanning electron microscope (SEM), atomic force microscope (AFM), and X-ray photoelectron spectroscopy (XPS). Thanks to the functional film and surface roughening, etched silicon surface fabricated by copolymer involving spiropyran (Sp) moieties possesses a fairly large variation range of WCA (28.1°) and achieves the transformation between hydrophilicity (95.2° < 109.2°) and hydrophobicity (123.3° > 109.2°) relative to blank sample (109.2°). The synthetic strategy and developed smart surface offer a promising application in coating with controllable wettability, which bridge the gap between chemical structure and material properties.
authors.affiliation: Department of Chemical Engineering, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University , Shanghai 200240, People's Republic of China.
authors.forename: Yin-Ning
authors.initials: YN
authors.lastname: Zhou
authors.forename: Jin-Jin
authors.initials: JJ
authors.lastname: Li
authors.forename: Qing
authors.initials: Q
authors.lastname: Zhang
authors.forename: Zheng-Hong
authors.initials: ZH
authors.lastname: Luo