%0 Online Multimedia %A Zhou, Cailong %A Li, Huijing %A Lin, Jing %A Hou, Kun %A Yang, Zhijie %A Pi, Pihui %A Xu, Shouping %A Wen, Xiufang %A Cheng, Jiang %D 2017 %T Matchstick-Like Cu2S@CuxO Nanowire Film: Transition of Superhydrophilicity to Superhydrophobicity %U https://acs.figshare.com/articles/media/Matchstick-Like_Cu_sub_2_sub_S_Cu_sub_i_x_i_sub_O_Nanowire_Film_Transition_of_Superhydrophilicity_to_Superhydrophobicity/5363695 %R 10.1021/acs.jpcc.7b03645.s002 %2 https://acs.figshare.com/ndownloader/files/9218098 %K mixture %K surface morphology %K matchstick-like structures %K superhydrophilic %K copper mesh %K contact angle measurement %K Scanning Electron Microscopy %K SEM %K surface chemical composition %K XRD %K XPS %K nanowire %K chemical composition %K superhydrophobic %K Cu %K X-ray Photoelectron Microscopy %K wettability transition %X We fabricated a matchstick-like Cu2S@CuxO nanowire film on copper mesh by applying a Cu­(OH)2 nanowires template-sacrificial method, which can transformed from superhydrophilic to superhydrophobic just after storage in air for a certain period without any further organic modification. The surface morphology, chemical composition and the wettability were investigated by Scanning Electron Microscopy (SEM), X-ray diffractometer (XRD), Raman, X-ray Photoelectron Microscopy (XPS), and contact angle measurement. Results showed that the change of surface chemical composition and the trapped air among the matchstick-like structures were the decisive factors for the wettability transition. Therefore, on-demand oil/water separation was achieved, which was performed by using the superhydrophilic–underwater superoleophobic mesh for separating light oil/water mixtures and the superhydrophobic one for separating heavy oil/water mixtures. %I ACS Publications