Fabrication and Tribological Investigation of a Novel Hydrophobic Polydopamine/Graphene Oxide Multilayer Film |
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Authors: | Junfei Ou Lei Liu Jinqing Wang Fajun Wang Mingshan Xue Wen Li |
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Affiliation: | 1. School of Materials Science and Engineering, Nanchang Hangkong University, Nanchang, 330063, People??s Republic of China 2. Institute of Pharmaceutics, Pharmaceutical College, Henan University, Kaifeng, 475004, People??s Republic of China 3. State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, People??s Republic of China
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Abstract: | Polydopamine (PDA)/graphene oxide (GO) multilayer was successfully constructed on the surface of silicon substrate by a layer-by-layer self assembling process. In order to further obtain hydrophobic outer surface, low energy molecules of 1H, 1H, 2H, 2H-perfluorodecyltrichlorosilane (PFDTS) were grafted thereon and the sample was coded as PDA/GO-PFDTS. The microstructures, chemical compositions, and morphologies of PDA/GO-PFDTS were characterized by the water contact angle (WCA) measurements, Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and atomic force microscopy (AFM). In particular, the tribological performances were investigated by AFM and ball-on-plate tribometer. Experimental results showed that PDA/GO-PFDTS could lower the stiction and friction greatly as compared with the bare substrate and control samples. It was indicated that the as-fabricated film of PDA/GO-PFDTS was a very promising candidate for solving the tribological problems in micro/nano devices. |
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