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Effect of the Anion on the Tribological Properties of Ionic Liquid Nano-Films on Surface-Modified Silicon Wafers

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Abstract

The films of three kinds of 3-butyl-1-methylimidazolium base ionic liquids with thickness of 2 nm were prepared on hydroxyl-terminated and amino-terminated Si substrates by dip-coating method. As anions, tetrafluoroborate, hexafluorophosphate, and adipate, respectively, were chosen. The tribological performances of these thin films were examined by the determination of the film durability and friction coefficient by means of a UMT-2MT tribometer using a steel ball as counterpart. The morphologies of worn surfaces were investigated by a non-contact interferometric microscope. The findings showed that 3-butyl-1-methyl-imidazolium hexafluorophosphate having the poorest hydrophilicity of the ionic liquids exhibited the best tribological properties on aminated Si surface at 0.4 N and 4 Hz.

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Acknowledgments

The authors thank the National Natural Science Foundation of China (NSFC 50675217), National 973 Program (2007CB607601), “100 Talents” Program of Chinese Academy of Sciences and Innovative Group Foundation (50421502) for the financial support of this work. The authors also thank Mr. Bo Wang for the XPS investigation and Ms. **aoning Wei for the NMR tested.

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Authors and Affiliations

  1. State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, China

    Min Zhu, Jie Yan, Yufei Mo & Mingwu Bai

  2. Graduate School of Chinese Academy of Sciences, Bei**g, 100039, China

    Min Zhu & Yufei Mo

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  1. Min Zhu
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  2. Jie Yan
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  3. Yufei Mo
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  4. Mingwu Bai
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Correspondence to Mingwu Bai.

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Zhu, M., Yan, J., Mo, Y. et al. Effect of the Anion on the Tribological Properties of Ionic Liquid Nano-Films on Surface-Modified Silicon Wafers. Tribol Lett 29, 177–183 (2008). https://doi.org/10.1007/s11249-007-9294-x

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  • DOI: https://doi.org/10.1007/s11249-007-9294-x

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