A study on the effect of fingerprints in a wet system.

Abstract:

:In this paper, we study the influence of the fingerprint and sweat on the fingerprint on the friction between the hand and an object. When sweat contacts a finger or an object, it is sometimes easy to pick up the object. In particular, we can see this phenomenon when grasping a thin object such as paper and vinyl. The reason for this phenomenon is the increase of friction force, and this paper physically analyzes this natural phenomenon. To this end, we investigate the cause of the friction force between a solid and liquid to calculate the friction force when water is present within the fingerprint. To support the theoretical analysis, we conduct experiments to measure the friction force by making a finger-shaped silicon specimen. By comparing the theoretical and experimental results, we defined the change of friction force if there was water in the fingerprint. Through this study, it is possible to analyze the role of the fingerprint and sweat on the finger, and thereby explain the friction change depending on the amount of sweat.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Kim D,Yun D

doi

10.1038/s41598-019-51694-9

subject

Has Abstract

pub_date

2019-11-12 00:00:00

pages

16554

issue

1

issn

2045-2322

pii

10.1038/s41598-019-51694-9

journal_volume

9

pub_type

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