Gas detection using low-temperature reduced graphene oxide sheets

Abstract

We demonstrate a high-performance gas sensor using partially reduced graphene oxide ͑GO͒ sheets obtained through low-temperature step annealing ͑300°C at maximum͒ in argon flow at atmospheric pressure. The electrical conductance of GO was measured after each heating cycle to interpret the level of reduction. The thermally reduced GO showed p-type semiconducting behavior in ambient conditions and were responsive to low-concentration NO 2 diluted in air at room temperature. The sensitivity is attributed to the electron transfer from the reduced GO to adsorbed NO 2 , which leads to enriched hole concentration and enhanced electrical conduction in the reduced GO sheet.

Highly selective gas sensor arrays based on thermally reduced graphene oxide

“…Similar to the case of graphene, electrical properties of GO are very sensitive to the surface adsorbates, [7][8][9] which stimulated a number of studies that focused on rGObased gas sensors. [10][11][12][13][14][15][16][17][18][19] Compared to pristine graphene, rGO has many advantages as a material for gas sensing. rGO could be synthesized in large quantities from inexpensive reagents using simple chemical approaches.…”

Room-Temperature Humidity Sensing Using Graphene Oxide Thin Films

“…Lu et al demonstrated using thermally-reduced graphene oxide to fabricate high-performance sensors to detect NO 2 and NH 3 in air [10] [11]. Lange et al used a graphene-palladium nanoparticle composite to detect hydrogen in air [12].…”

Ab initiotransport fingerprints for resonant scattering in graphene

“…17,18 Epoxide is also a component of graphene oxide, 19,20 which has been used 235417-1 1098-0121/2012/86(23)/235417 (7) ©2012 American Physical Society for graphene synthesis 21 and sensor applications. 11,22 Carbon adatoms, on the other hand, are created during irradiation of graphene, for example, when intentionally creating vacancy and bond rotation defects. 23 The organization of the paper is as follows.…”