LTDS-ECL, 36 Avenue Guy de Collongue, 69134 Ecully, France.
Nanotechnology. 2012 Sep 21;23(37):375701. doi: 10.1088/0957-4484/23/37/375701. Epub 2012 Aug 24.
Inorganic fullerene-like (IF) nanoparticles made of metal dichalcogenides have previously been recognized to be good friction modifiers and anti-wear additives under boundary lubrication conditions. The tribological performance of these particles appears to be a result of their size, structure and morphology, along with the test conditions. However, the very small scale of the IF nanoparticles makes distinguishing the properties which affect the lubrication mechanism exceedingly difficult. In this work, a high resolution transmission electron microscope equipped with a nanoindentation holder is used to manipulate individual hollow IF-WS(2) nanoparticles and to investigate their responses to compression. Additional atomistic molecular dynamics (MD) simulations of similarly structured, individual hollow IF-MoS(2) nanoparticles are performed for compression studies between molybdenum surfaces on their major and minor axis diameters. MD simulations of these structures allows for characterization of the influence of structural orientation on the mechanical behavior and nano-sheet exfoliation of hollow-core IF nanoparticles. The experimental and theoretical results for these similar nanoparticles are qualitatively compared.
先前的研究表明，由金属二卤化物制成的无机富勒烯类（IF）纳米粒子在边界润滑条件下是优良的摩擦改性剂和抗磨添加剂。这些粒子的摩擦学性能似乎与其尺寸、结构和形态以及测试条件有关。然而，IF 纳米粒子的非常小尺寸使得区分影响润滑机制的特性变得非常困难。在这项工作中，使用配备有纳米压痕仪的高分辨率透射电子显微镜来操纵单个空心 IF-WS(2)纳米粒子，并研究它们对压缩的响应。还对类似结构的单个空心 IF-MoS(2)纳米粒子进行了附加的原子分子动力学（MD）模拟，以研究钼表面在其主要和次要轴直径之间的压缩。这些结构的 MD 模拟允许对结构取向对空心核 IF 纳米粒子的机械行为和纳米片剥落的影响进行特征化。对这些相似的纳米粒子进行了实验和理论结果的定性比较。
