Podestà A, Fantoni G, Milani P, Ragazzi M, Donadio D, Colombo L
INFM, Dipartimento di Fisica, Università di Milano, 20133 Milano, Italy.
J Nanosci Nanotechnol. 2002 Dec;2(6):637-43. doi: 10.1166/153348802321105923.
We have characterized the frictional properties of nanostructured carbon films grown by supersonic cluster beam deposition via an atomic force-friction force microscope (AFM-FFM). The experimental data are discussed on the basis of a modified Amonton's law for friction, stating a linear dependence of friction on load plus an adhesive offset accounting for a finite friction force in the limit of null total applied load. Molecular dynamics simulations of the interaction of the AFM tip with the nanostructured carbon confirm the validity of the friction model used for this system. Experimental results show that the friction coefficient is not influenced by the nanostructure of the films nor by the relative humidity. On the other hand the adhesion coefficient depends on these parameters.
我们通过原子力-摩擦力显微镜（AFM-FFM）对超声团簇束沉积生长的纳米结构碳膜的摩擦特性进行了表征。基于修正的阿蒙顿摩擦定律对实验数据进行了讨论，该定律表明摩擦力与负载呈线性关系，外加一个粘附偏移量，用于解释在总施加载荷为零的极限情况下的有限摩擦力。AFM针尖与纳米结构碳相互作用的分子动力学模拟证实了该系统所使用摩擦模型的有效性。实验结果表明，摩擦系数不受薄膜纳米结构和相对湿度的影响。另一方面，粘附系数则取决于这些参数。
