Inkjet — Printed graphene layer by layer on SAW devices for gas detection applications

This work demonstrates ink-jet printing as an alternative deposition method for low cost gas sensors based on graphene. Our ink-jet printing method paves the way towards for massive, large-area industrial production of Graphene Oxide (GO) multilayer sensitive films for Volatile Organic Compounds (VOCs) detection. The adsorption of vapor compounds on GO leads to a sensitivity of 30 Hz/ppm and 24 Hz/ppm of C₂H₆O and C₇H₈, respectively. The experiments were conducted in real-time under ambient conditions, which places this layer-by-layer inkjet printing technique one of the most promising features for inexpensive and high-speed patterning deposition method for trace-gas applications.