CVD Graphene-Based Sensor vs LIG-Based Sensor for VOC and Gas Testing

The detection of Volatile Organic Compounds (VOCs) is essential for environmental monitoring and medical diagnostics, requiring the development of responsive and selective gas sensors. This study compares two graphene-based chemiresistive sensors: laser-induced graphene (LIG) and chemical vapor deposition (CVD) grown graphene on interdigitated electrodes (IDEs) exposed to ethanol, isopropanol, acetone, and ammonia. Following testing, characterization was done using Scanning Electron Microscopy (SEM) imaging and Raman Spectroscopy to study the morphology and structure that influenced their gas sensing performance. By comparing electrical responses upon exposure, the LIG-based sensor was able to provide selective responses to the VOC’s while recovering after exposure. Along with its responsivity, the sustainable, cost-effective, and scalable fabrication of LIG drives it to be the foundation for electronic nose (e-nose) applications in various fields.