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Laser‐Induced Graphene Strain Sensors Produced by Ultraviolet Irradiation of Polyimide
Author(s) -
Carvalho Alexandre F.,
Fernandes António J. S.,
Leitão Cátia,
Deuermeier Jonas,
Marques Ana C.,
Martins Rodrigo,
Fortunato Elvira,
Costa Florinda M.
Publication year - 2018
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201805271
Subject(s) - materials science , polyimide , graphene , laser , ultraviolet , irradiation , infrared , bending , optoelectronics , penetration (warfare) , polymer , penetration depth , composite material , strain (injury) , optics , nanotechnology , medicine , physics , layer (electronics) , nuclear physics , engineering , operations research
Laser‐induced graphene (LIG) can be obtained by irradiation of a polymer by a laser source. The present work demonstrates that it is possible to obtain this kind of material using an ultraviolet laser instead of the typical infrared source. Using this approach, a fourfold decrease in the penetration depth (5 µm) is achieved, while the spatial resolution is doubled. Electromechanical strain LIG sensors are patterned in polyimide substrates with different thicknesses and their performance to strain, bending, and force inputs is measured. A low‐cost arterial pulse wave monitor is built, exploring the high force sensitivity of the sensors produced on the thinner substrates.