Highly Sensitive NH3 Sensors Using CVD and Epitaxial Graphene Functionalised with Vanadium(V) Oxide: A Comparative Study

Proceedings

Jens Eriksson¹  Rositsa Yakimova¹  Margus Kodu²  Artjom Berholts²  Tea Avarmaa²  Tauno Kahro²  Indrek Renge²  Harry Alles²  Raivo Jaaniso² 

[1] Department of Physics, Chemistry and Biology, Linköping University, 58183 Linköping, Sweden;Institute of Physics, University of Tartu, W. Ostwald Street 1, EE50411 Tartu, Estonia;

关键词: ammonia;    CVD graphene;    epitaxial graphene on SiC;    gas sensor;    pulsed laser deposition;    selectivity;    single layer graphene;    UV light activation;    vanadium(V) oxide;   

DOI  :  10.3390/proceedings2130854

来源: DOAJ

【 摘 要 】

Exceptionally sensitive and selective graphene-based chemiresistive gas sensors were produced as a result of graphene functionalisation with a sub-nanometer V₂O₅ layer by using the method of pulsed laser deposition. Two different types of graphene were used—epitaxial graphene on SiC and CVD graphene on Si/SiO₂—and both showed remarkable enhancement of sensing properties in terms of response and recovery speed, response magnitude and selectiveness towards NH₃ gas. The epitaxial graphene-based sensor was demonstrating the highest relative response towards ammonia amounting to 80% for 0.1 ppm NH₃.

【 授权许可】

Unknown