Highly skin-conformal microhairy sensor for pulse signal amplification

Changhyun Pang; Ja Hoon Koo; Amanda Nguyen; Jeffrey M Caves; Myung-Gil Kim; Alex Chortos; Kwanpyo Kim; Paul J Wang; Jeffrey B-H Tok; Zhenan Bao

doi:10.1002/adma.201403807

Highly skin-conformal microhairy sensor for pulse signal amplification

Adv Mater. 2015 Jan 27;27(4):634-40. doi: 10.1002/adma.201403807. Epub 2014 Oct 30.

Authors

Changhyun Pang¹, Ja Hoon Koo, Amanda Nguyen, Jeffrey M Caves, Myung-Gil Kim, Alex Chortos, Kwanpyo Kim, Paul J Wang, Jeffrey B-H Tok, Zhenan Bao

Affiliation

¹ Department of Chemical Engineering, Stanford University, Stanford, California, 94305, USA; School of Chemical Engineering, Sungkyunkwan University (SKKU), Suwon, 440-746, South Korea.

PMID: 25358966
DOI: 10.1002/adma.201403807

Abstract

A bioinspired microhairy sensor is developed to enable ultraconformability on nonflat surfaces and significant enhancement in the signal-to-noise ratio of the retrieved signals. The device shows ≈12 times increase in the signal-to-noise ratio in the generated capacitive signals, allowing the ultraconformal microhair pressure sensors to be capable of measuring weak pulsations of internal jugular venous pulses stemming from a human neck.

Keywords: biosensors; flexible electronics; microhairs; pulsation.

Publication types

Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

Animals
Biomimetics / instrumentation*
Heart Rate*
Humans
Signal-To-Noise Ratio
Skin*
Swine