Laser-induced graphene (LIG) represents a compelling platform for electrochemical sensing, combining exceptional electrical conductivity with scalable fabrication and low production costs.1,2 Nevertheless, its wider adoption remains limited by key challenges, particularly achieving strong substrate adhesion and reconciling high conductivity with mechanical stability required to maintain electrical integrity under strain. These limitations have largely limited LIG-stretchable devices to strain and pressure-sensing applications. Addressing the retention of low electrical resistance under mechanical deformation is therefore essential for advancing LIG toward wearable electrochemical sensing. In this work, we report the development of a stretchable electrochemical sensor based on LIG that retains the electrochemical performance under uniaxial strain up to 20%. Using a simple electrode-fabrication approach, LIG synthesized on polyimide was transferred to pre-stretched commercial elastomeric substrates, enabling the device to withstand strain while preserving structural integrity and electrical conductivity. Comprehensive material characterization, including Raman spectroscopy, high-resolution transmission electron microscopy, scanning electron microscopy, and X-ray photoelectron spectroscopy, confirmed the characteristic morphology and composition of the LIG network. The electrodes exhibited stable cyclic voltametric responses and preserved their characteristics during folding and stretching cycles. As a proof-of-concept, the electrodes were modified with Prussian blue and lactate oxidase for lactate sensing in artificial sweat. The sensor could detect lactate over a physiologically relevant concentration range of 5 – 30 mmol L-1,3 and exhibited stable, reproducible signals across multiple deformations. This work demonstrates the feasibility of fully stretchable LIG-based electrochemical sensors and supports their potential integration into wearable sensing platforms.
References
1 Y. Cao, ACS Nano, 2021, 15, 11014–11039.
2 M. Bridges, E. Marin, A. Banik, C. S. Henry, ACS Appl. Mater. Interfaces 2025, 17, 22, 32701–32710
3 X. Xuan, C. Pérez-Ràfols, C. Chen, M. Cuartero and G. A. Crespo, ACS Sens., 2021, 6, 2763–2771.
Comissão Organizadora
Pedro Alves da Silva Autreto
Comissão Científica
Ferramenta completa de submissão, avaliação e publicação de anais para eventos científicos.
