Super-stretchable, Transparent Carbon Nanotube-based Capacitive Strain Sensors for Human Motion Detection

Overview

Journal Sci Rep

Specialty Science

Date 2013 Oct 26

PMID 24157842

Citations 95

Authors

Le Cai

Li Song

Pingshan Luan

Qiang Zhang

Nan Zhang

Qingqing Gao

Duan Zhao

Xiao Zhang

Min Tu

Feng Yang

Wenbin Zhou

Qingxia Fan

Jun Luo

Weiya Zhou

Pulickel M Ajayan

Sishen Xie

Affiliations

Soon will be listed here.

Abstract

Realization of advanced bio-interactive electronic devices requires mechanically compliant sensors with the ability to detect extremely large strain. Here, we design a new multifunctional carbon nanotube (CNT) based capacitive strain sensors which can detect strains up to 300% with excellent durability even after thousands of cycles. The CNT-based strain gauge devices exhibit deterministic and linear capacitive response throughout the whole strain range with a gauge factor very close to the predicted value (strictly 1), representing the highest sensitivity value. The strain tests reveal the presented strain gauge with excellent dynamic sensing ability without overshoot or relaxation, and ultrafast response at sub-second scale. Coupling these superior sensing capabilities to the high transparency, physical robustness and flexibility, we believe the designed stretchable multifunctional CNT-based strain gauge may have various potential applications in human friendly and wearable smart electronics, subsequently demonstrated by our prototypical data glove and respiration monitor.

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