TY - JOUR
T1 - Laser-Induced Graphene Piezoresistive Sensors Synthesized Directly on Cork Insoles for Gait Analysis
AU - Carvalho, Alexandre F.
AU - Fernandes, António J. S.
AU - Martins, Rodrigo
AU - Fortunato, Elvira
AU - Costa, Florinda M.
N1 - info:eu-repo/grantAgreement/EC/H2020/787410/EU#
projects, i3N, UIDB/50025/2020, and UIDP/50025/2020, financed by national funds through the FCT/MCTES.
A.F.C. acknowledges the PhD grant DAEPHYS-FCT PD/BD/114063/2015, and the funding from "Programa de Estimulo a InvestigacAo 2016" from FundacAo Calouste Gulbenkian.
The authors thank Amorim Cork Composites for providing the cork samples used in this work.
PY - 2020/12
Y1 - 2020/12
N2 - Monitorization of gait-related parameters is of the utmost importance to prevent complications in several diseases, ensuring affordable healthcare for the growing amount of chronic, lifestyle-related diseases and also for improving motion performance. Sensorized insoles allow to both pressure data and gait timings to be extracted non-intrusively in a point of care paradigm. Laser-induced graphene (LIG) offers a path to the integration of sensors in different kinds of materials, including cork, a common insole material. In this work, piezoresistive sensors are developed by providing conductivity to natural cork and agglomerate cork through the direct synthesis of LIG by UV irradiation. Highly isotropic conductive LIG regions with less than 100 Ω sq−1 are patterned and their piezoresistive response for up to 1132 kPa is assessed with sensitivities up to 0.02 kPa−1. A low-cost prototype insole is devised and tested, proving the potential of this kind of functional cork as a green alternative for gait analysis platforms.
AB - Monitorization of gait-related parameters is of the utmost importance to prevent complications in several diseases, ensuring affordable healthcare for the growing amount of chronic, lifestyle-related diseases and also for improving motion performance. Sensorized insoles allow to both pressure data and gait timings to be extracted non-intrusively in a point of care paradigm. Laser-induced graphene (LIG) offers a path to the integration of sensors in different kinds of materials, including cork, a common insole material. In this work, piezoresistive sensors are developed by providing conductivity to natural cork and agglomerate cork through the direct synthesis of LIG by UV irradiation. Highly isotropic conductive LIG regions with less than 100 Ω sq−1 are patterned and their piezoresistive response for up to 1132 kPa is assessed with sensitivities up to 0.02 kPa−1. A low-cost prototype insole is devised and tested, proving the potential of this kind of functional cork as a green alternative for gait analysis platforms.
KW - cork
KW - gait
KW - laser-induced graphene
KW - pressure sensors
KW - UV laser
UR - http://www.scopus.com/inward/record.url?scp=85096811192&partnerID=8YFLogxK
U2 - 10.1002/admt.202000630
DO - 10.1002/admt.202000630
M3 - Article
AN - SCOPUS:85096811192
SN - 2365-709X
VL - 5
JO - Advanced Materials Technologies
JF - Advanced Materials Technologies
IS - 12
M1 - 2000630
ER -