可调节,宽温度和宏观超度通过纳米级范德瓦尔斯异质连接到同质连接转换实现

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Xing Yang¹, Ruiyun Li², Yongfu Wang^1,3

¹State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Science, Lanzhou, 730 000, China.

Advanced materials (Deerfield Beach, Fla.)

|June 24, 2023

概括

石墨烯边缘与氧气的结合使得范德瓦尔斯纳米粉中通过形成异质连接来实现宏观的超性. 这一突破使得可调节的超性在广泛的条件范围内,为工程应用铺平了道路.

科学领域:

材料科学材料科学材料科学
部落学 (tribology) 是一个学科.
纳米技术纳米技术

背景情况:

由于复杂的连接形成和摩擦诱导的重组,使用范德瓦尔斯 (vdW) 纳米粉末实现宏观超度是很困难的.
现有的方法在有序结形成和管理纳米级接触动态方面存在困难.

研究的目的:

在VDW纳米粉中开发一种实现宏观超度的简单方法.
为了研究石墨烯边缘氧 (GEO) 在修改VDW纳米粉结构以提高滑的作用.
为了在广泛的操作条件下证明可调节的超性.

主要方法:

将石墨烯边缘氧 (GEO) 纳入vdW纳米粉末.
用修改的纳米粉末结构制造磨砂球.
在不同的负载,速度和温度下,对类似钻石的碳表面进行 Tribological 测试.
原子模拟用于阐明超性机制.

主要成果:

GEO的整合有助于vdW纳米粉末转化为异质连接,从而创建一个混合的同质连接/异质连接结构.
异质连接到同质连接的转换机制控制着宏观超度.
超度 (摩擦系数 μ ≈ 0.005) 在广泛的温度范围 (-200 到 300 °C) 和不同的负载和速度中实现.
原子模拟证实了GEO增强的转换和转换机制.

结论:

在VDW纳米粉中,将GEO纳入是实现宏观超度的有效策略.
发现的异质连接到同质连接的转换机制为设计超性提供了一条途径.
这项工作对结构超度的扩展和工程应用具有重大意义.

关键词:

两维异构连接是二维异构连接.两维同质连接的2D同质连接石墨烯是一种石墨烯.超级滑性是一种超级滑性.范德瓦尔斯的纳米粉末

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