Laser-Induced Graphene Strain Sensors Produced by Ultraviolet Irradiation of Polyimide

Alexandre F. Carvalho, António J. S. Fernandes, Cátia Leitão, Jonas Deuermeier, Ana Carolina Marques, Rodrigo Martins, Elvira Fortunato, Florinda M. Costa

Research output: Contribution to journalArticlepeer-review

137 Citations (Scopus)


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.

Original languageEnglish
Article number1805271
JournalAdvanced Functional Materials
Issue number52
Publication statusPublished - 27 Dec 2018


  • Kapton
  • laser-induced graphene
  • strain sensors
  • UV lasers


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