Controlled Hydration in Epidermal Ridges Probed by THz Time-Domain Spectroscopy

Seoung Mok Yum, In Keun Baek, Dongpyo Hong, Seontae Kim, Kihoon Eom, Jeongmin Jang, Sunmyeong Kim, Matlabjon Sattorov, Min Geol Lee, Sungwan Kim, Michael Adams, Gun Sik Park

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Fingerprints are common to humans, primates, and koalas but how their role in grip activities is poorly understood. Here, we reveal that the fingerprints control the hydration level of the fingertip, as required for precision gripping, by ultimately maximizing the friction. Electromagnetic waves with frequencies in the megahertz, terahertz, infrared, and visible ranges were used to identify the hydrodynamics in fingerprints, which lead to the steady-state hydration condition in 'dry' and 'wet' conditions. The results suggest that the fingerprint structure functions as a moisture channel for facilitating precision grip.

Original languageEnglish
Title of host publicationIRMMW-THz 2019 - 44th International Conference on Infrared, Millimeter, and Terahertz Waves
PublisherIEEE Computer Society
ISBN (Electronic)9781538682852
DOIs
Publication statusPublished - 2019 Sep
Event44th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2019 - Paris, France
Duration: 2019 Sep 12019 Sep 6

Publication series

NameInternational Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz
Volume2019-September
ISSN (Print)2162-2027
ISSN (Electronic)2162-2035

Conference

Conference44th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2019
CountryFrance
CityParis
Period19/9/119/9/6

    Fingerprint

All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

Cite this

Yum, S. M., Baek, I. K., Hong, D., Kim, S., Eom, K., Jang, J., Kim, S., Sattorov, M., Lee, M. G., Kim, S., Adams, M., & Park, G. S. (2019). Controlled Hydration in Epidermal Ridges Probed by THz Time-Domain Spectroscopy. In IRMMW-THz 2019 - 44th International Conference on Infrared, Millimeter, and Terahertz Waves [8873980] (International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz; Vol. 2019-September). IEEE Computer Society. https://doi.org/10.1109/IRMMW-THz.2019.8873980