access icon free Friction measurement and motion state determination of a single polystyrene nanoparticle during manipulation

Over the past two decades, the manipulation of nanoparticles has attracted increasing attention. This process provides essential information about tribology, which is of great significance for the exploration of the origin of friction. However, the motion state of the nanoparticles during this process must first be determined. Furthermore, since the nanoparticles could slide, roll, or spin when manipulated by the probe of the atomic force microscope, it was difficult to distinguish whether the force measured in the experiments denoted sliding or rolling friction. In this Letter, considerable manipulation and friction measurement experiments were performed, while the theoretical rolling and sliding friction were calculated using the Double-Hertz model. Furthermore, by comparing the theoretical calculations and experimental results, the motion state of the nanoparticle could be determined. Additionally, it was found that the critical rolling distance, which is essential for calculating rolling friction, decreases as the particle size increases.

Inspec keywords: rolling friction; particle size; polymers; nanoparticles; force measurement; mechanical contact; sliding friction; adhesion; atomic force microscopy; friction

Other keywords: single polystyrene nanoparticle; sliding friction; theoretical rolling; friction measurement experiments; considerable manipulation; critical rolling distance; atomic force microscope; motion state

Subjects: Tribology (mechanical engineering); Elasticity and anelasticity; Structure of solid clusters, nanoparticles, nanotubes and nanostructured materials; Solid surface structure; Tribology; Friction, lubrication, and wear

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http://iet.metastore.ingenta.com/content/journals/10.1049/mnl.2020.0383
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