Jonathan Coleman, Professor of Chemical Physics at School of Physics and CRANN – Trinity College Dublin, will present at the Health Tech Event: “The magic of nanomaterials: From rubber bands to state of the art sensors”.
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.
About Jonathan Coleman
Jonathan Coleman’s research focuses on the large scale production of 2D materials such as graphene for applications from sensing to energy storage. Coleman has led many industry-academia collaborative projects, working with companies such as Hewlett-Packard, SAB Miller and Intel. He has published approximately 190 papers in international journals including Nature and Science and has a h-index of 58. He was recently listed by Thomson Reuters among the world’s top 100 materials scientists of the last decade and was named as the Science Foundation Ireland researcher of the Year in 2011.
About School of Physics and CRANN, Trinity College Dublin
CRANN is an industry-facing nanoscience centre based in Trinity College Dublin. The centre partners leading researchers in material science with industry to develop new materials and devices for a range of sectors, particularly the ICT, medical devices and industrial technology sectors.
Find out more about Trinity College Dublin