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Reversible Wettability of Tungsten Trioxide Films with Novel Dandelion‐like Structures
Author(s) -
Wang Xinmin,
Wei Zhihua,
Yu Chengqun,
Zhang Xianzhou,
Zhang Yidong
Publication year - 2012
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201100392
Subject(s) - tungsten trioxide , x ray photoelectron spectroscopy , contact angle , superhydrophilicity , scanning electron microscope , materials science , wetting , tungsten , molybdenum trioxide , chemical engineering , nuclear chemistry , chemistry , composite material , molybdenum , metallurgy , engineering
Tungsten trioxide (WO 3 ) films with novel dandelion‐like structures were prepared by spin‐coating a sol of WO 3 with CTAB (cetyltrimethyl ammonium bromides) on quartz substrates. The resultant WO 3 films were characterized by X‐ray diffraction (XRD), FT‐IR spectroscopy, scanning electron microscopy (SEM), and X‐ray photoelectron spectroscopy (XPS). The wettabilities of the WO 3 films were evaluated by contact angle (CA) measurements. It was found that the WO 3 film exhibited superhydrophilicity under UV light irradiation, whereas after storage in the dark for a certain time, it turned to be superhydrophobic.