材料科学
吸附
金属有机骨架
消散
实现(概率)
上部结构
金属
工作(物理)
化学物理
化学工程
平方(代数)
纳米技术
晶体结构
结晶学
机械工程
化学
物理化学
结构工程
热力学
几何学
冶金
物理
工程类
数学
统计
作者
Lei Liu,Yong Zhang,Yijun Qiao,Shanchao Tan,Shaofei Feng,Jing Ma,Yuhong Liu,Jianbin Luo
出处
期刊:Nano Today
[Elsevier]
日期:2021-10-01
卷期号:40: 101262-101262
被引量:46
标识
DOI:10.1016/j.nantod.2021.101262
摘要
It can be inferred from the existing frictional energy dissipation mechanism that metal-organic frameworks (MOFs) may be an ideal material to achieve the solid superlubricity, which is an essential pathway in the energy efficiency. In this work, five MOFs with square grid structure are synthesized, namely Cu(1,4-BDC)(DMF), Cu(1,4-NDC)(DMF), Cu(2,6-NDC)(DMF), Co(1,4-BDC)(DMF) and Zn(1,4-BDC)(DMF), and the superlubricity can be achieved on all of these surface (friction coefficient as low as 5.3 * 10−4). Through experiments and DFT simulation, the realization of superlubricity is attributed to two aspects: firstly, the hybrid inorganic-organic structure of MOFs eliminates puckering effect in topographic factors; secondly, the interaction between probe and MOFs is anchoring effect that is so weak as physical adsorption. The anchoring effect is closely related to the structure unit of MOFs that helps us establish the structure-function relationship. When metal nodes and ligands are selected according to the crystal field theory, the friction performance will be optimal for MOFs with the stable coordination. Moreover, the friction performance of MOFs is predictable that gives MOFs great potential in energy conservation.
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