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首页> 外文期刊>Journal of Materials Research >Nanotribological properties of few layer graphene surfaces, prepared by bottom-up and top-down methods, in ambient air and liquid environments
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Nanotribological properties of few layer graphene surfaces, prepared by bottom-up and top-down methods, in ambient air and liquid environments

机译：在环境空气和液体环境中，通过自下而上和自上而下的方法制备的几层石墨烯表面的纳米摩擦性能

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摘要

The role of bottom-up and top-down synthesis methods on the nanotribological response of few layer graphene (FLG) in air and various liquid environments is reported. Oxidized FLG adhesion against Si increases by a factor of 2 as compared to non-oxidized samples. Also, it is reported that the FLG center-to-edge adhesion typically exhibits a decreasing tendency. In air, a highly lubricious nanotribological response (0.03-0.04) of both bottom-up and top-down prepared samples is measured. The frictional behavior of bottom-up synthesized FLG in different liquid environments is found to depend on the absence or presence of viscous aggregates in the respective liquid. A Stribeck-like behavior is suggested for viscous synthetic lubricants, such as silicone, present as the third body in the FLG/Si tip system. Such nanoscale behavior, indicating transitions in different lubrication regimes, may be particularly important for the further understanding of liquid-graphene interfaces in novel tribological and device applications.
机译：自下而上和自上而下的合成方法在空气和各种液体环境中对几层石墨烯（FLG）的纳米摩擦响应中的作用进行了报道。与未氧化的样品相比，氧化的FLG对Si的附着力增加了2倍。另外，据报道，FLG的中心到边缘的粘合通常表现出下降的趋势。在空气中，测量了自下而上和自上而下制备的样品的高度润滑的纳米摩擦响应（0.03-0.04）。发现自下而上的合成FLG在不同液体环境中的摩擦行为取决于相应液体中是否存在粘性聚集体。建议在FLG / Si尖端系统中作为第三体使用的粘性合成润滑剂（如硅树脂）具有类似Stribeck的行为。这种纳米级行为，表明在不同润滑方式下的转变，对于进一步了解新型摩擦学和设备应用中的液体-石墨烯界面可能特别重要。

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  • 来源
    《Journal of Materials Research》 |2016年第13期|1924-1931|共8页
  • 作者

    Konstantinos A. Sierros; Sai Suvineeth Ramayanam; Charter D. Stinespring;

  • 作者单位

    Department of Mechanical and Aerospace Engineering, West Virginia University, Morgantown, West Virginia 26506, USA;

    Department of Mechanical and Aerospace Engineering, West Virginia University, Morgantown, West Virginia 26506, USA;

    Department of Chemical Engineering, West Virginia University, Morgantown, West Virginia 26506, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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  • 正文语种 eng
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