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

Proceedings

Kahro, Tauno¹  Berholts, Artjom²  Kodu, Margus³  Eriksson, Jens⁴ 

[1] Author to whom correspondence should be addressed.;Department of Physics, Chemistry and Biology, Linköping University, 58183 Linköping, Sweden;Institute of Physics, University of Tartu, W. Ostwald Street 1, EE50411 Tartu, Estonia;Presented at the Eurosensors 2018 Conference, Graz, Austria, 9–12 September 2018

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

学科分类：社会科学、人文和艺术（综合）

来源: mdpi

【 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】

CC BY