润滑油
材料科学
石墨烯
摩擦系数
摩擦系数
变形(气象学)
分子动力学
复合材料
纳米技术
格子(音乐)
化学物理
计算化学
化学
物理
声学
作者
Peiwei Gong,Juan Li,Junyi Wang,Wei Wu,Cheng Li,Dandan Wang,Junqin Shi,Jianxi Liu,Feng Zhou,Weimin Liu
出处
期刊:ACS Nano
[American Chemical Society]
日期:2023-04-19
卷期号:17 (9): 8252-8261
被引量:6
标识
DOI:10.1021/acsnano.2c12422
摘要
Like the multilayered graphene which is the most widely used solid lubricant, graphdiyne (GDY) as a 2D material holds potential similar prospects but has been rarely researched so far. One reason is that growing a GDY film in a controllable manner on diverse material surfaces remains a great challenge. To address the issue, a catalytic pregrowth and solution polymerization method is developed to synthesize a GDY film on various substrates. It allows fine control over film structure and thickness. A macroscopic ultralow friction coefficient of 0.08 is obtained, and a relatively long life of more than 5 h under a high load of 1378 MPa is achieved. Molecular dynamics simulations together with the surface analysis demonstrate that the increased deformation degree and weakened relative motion between GDY layers contribute to the low friction. Especially, different from graphene, the friction of GDY exhibits a double increase and decrease in one period of λ ≈ 8-9 Å, and it is roughly equal to the distance between two adjacent alkyne bonds in the x direction, indicating GDY's structure and lattice play an important role in reducing friction.
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