Type

Journal Article

Authors

Alan B Dalton
Izabela Jurewicz
Yang Liu
Ravi Shanker
Shane Duane
Joe McCauley
Arlene O'Neill
Jonathan Coleman
Claudia Backes
Umar Khan
and 1 others

Subjects

Engineering

Topics
monitoring physiologic chemistry strain rates movement graphene dynamic strain composites stress mechanical elasticity strain rate motion sensors graphite instrumentation humans human bodily motion wearable sensors high rate rubber

Sensitive, high-strain, high-rate bodily motion sensors based on graphene-rubber composites (2014)

Abstract Monitoring of human bodily motion requires wearable sensors which can detect position, velocity and acceleration. They should be cheap, lightweight, mechanically compliant and display reasonable sensitivity at high strains and strain-rates. No reported material has simultaneously demonstrated all the above requirements. Here we describe a simple method to infuse liquid-exfoliated graphene into natural rubber to create conducting composites. These materials are excellent strain-sensors displaying 104-fold increases in resistance and working at strains exceeding 800%. The sensitivity is reasonably high with gauge factors of up to 35 observed. More importantly, these sensors can effectively track dynamic strain, working well at vibration frequencies of at least 160 Hz. At 60 Hz, we could monitor strains of at least 6% at strain rates exceeding 6000 %/s. We have used these composites as bodily motion sensors, effectively monitoring joint and muscle motion as well and breathing and pulse.
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Full list of authors on original publication

Alan B Dalton, Izabela Jurewicz, Yang Liu, Ravi Shanker, Shane Duane, Joe McCauley, Arlene O'Neill, Jonathan Coleman, Claudia Backes, Umar Khan and 1 others

Experts in our system

1
Arlene O'Neill
Trinity College Dublin
Total Publications: 25
 
2
Jonathan Coleman
Trinity College Dublin
Total Publications: 217
 
3
Claudia Backes
Trinity College Dublin
Total Publications: 20
 
4
Umar Khan
Trinity College Dublin
Total Publications: 37