Role of graphene quantum dots with discrete band gaps on SnO₂ nanodomes for NO₂ gas sensors with an ultralow detection limit.

ABSTRACT: NO₂ is a major air pollutant that should be monitored due to its harmful effects on the environment and human health. Semiconducting metal oxide-based gas sensors have been widely explored owing to their superior sensitivity towards NO₂, but their high operating temperature (>200 °C) and low selectivity still limit their practical use in sensor devices. In this study, we decorated graphene quantum dots (GQDs) with discrete band gaps onto tin oxide nanodomes (GQD@SnO₂ nanodomes), enabling room temperature (RT) sensing towards 5 ppm NO₂ gas with a noticeable response ((R_a/R_g) - 1 = 4.8), which cannot be matched using pristine SnO₂ nanodomes. In addition, the GQD@SnO₂ nanodome based gas senso

SUBMITTER: Lee J 

PROVIDER: S-EPMC10186987 | biostudies-literature | 2023 May

REPOSITORIES: biostudies-literature