Adhesion and friction studies of Au nanoparticle‐textured surfaces with colloidal tips

Abstract

Surface roughness plays an important role in affecting the adhesive force and friction force in microelectromechanical systems (MEMS)/nanoelectromechanical systems (NEMS). One effective approach of reducing adhesion and friction of contacting interfaces is to create textured surface, which is especially beneficial for MEMS'/NEMS' production yield and product reliability. In this article, we present a convenient method to fabricate the nano-textured surfaces by self-assembling Au nanoparticles (NPs) on the silicon (100) surfaces. The nanoparticle-textured surfaces (NPTS) with different packing density and texture height were prepared by controlling the assembling time and the size of Au NPs. The morphologies and chemical states of NPTS were characterized by atomic force microscope (AFM), field emission scanning electron microscope, and XPS. The adhesion and friction on the NPTS were studied by AFM with colloidal tip. The results show that the nano-textured surfaces have effectively reduced adhesive force and friction force compared with the 3-aminopropyl trimethoxysilane self-assembled monolayer surfaces. The lowered adhesion and friction were attributed to the reduced real area of contact between NPTS and colloidal tip. The adhesion and friction of the NPTS are varying with the texture packing density and dependent on both the texture height and asperities spacing, which are related to the size and coverage ratio of NPs on surfaces.

Influence of Nanoscale Textured Surfaces and Subsurface Defects on Friction Behaviors by Molecular Dynamics Simulation

“…Compared with the smooth surface, textured surfaces can reduce average friction forces effectively, and the average friction forces decrease with an increase in texture depth, which is consistent with the conclusions of Refs. [10,11,19,22].…”

“…The nanotribological performances could be greatly improved by designing a suitable surface topography, and the friction force decreased as cylindrical pillar area density and height increased. Zhang et al [11] found that Au nanoparticle-textured surfaces with a higher texture height could reduce the friction forces more efficiently. Yu et al [12] studied the friction behaviors of the surfaces with grooves at the nano-, micro-, and macroscales.…”

Observation of adhesive force and energy of adsorbents on rubber substrates by atomic force microscopy

“…, the curves show the pull‐off process during the interaction between the sample and the tip. From the curve, we obtain the force and energy of the adhesive phenomena, Young's modulus of the slope of the F–D curves, and the strain between the sample and the probe.…”

Frictional Behavior of Micro/Nanotextured Surfaces Investigated by Atomic Force Microscope: A Review

“…The larger AFM tip will make it easier to form multi-contact between the friction pair, resulting in reduced adhesive force and friction force. We studied the adhesion and friction behavior of nanoparticle-textured surfaces by AFM colloidal probe, 89 and found that it is easy to reduce the adhesive and friction forces for the nanoparticletextured surfaces with low packing density of textures. For the surfaces with higher packing density, the adhesive and friction forces will¯rst decrease and then increase with increasing packing density of the nanoparticle.…”