C₆₀Br₂₄/SWCNT: A Highly Sensitive Medium to Detect H₂S via Inhomogeneous Carrier Doping.

ABSTRACT: H₂S is a toxic and corrosive gas, whose accurate detection at sub-ppm concentrations is of high practical importance in environmental, industrial, and health safety applications. Herein, we propose a chemiresistive sensor device that applies a composite of single-walled carbon nanotubes (SWCNTs) and brominated fullerene (C₆₀Br₂₄) as a sensing component, which is capable of detecting 50 ppb H₂S even at room temperature with an excellent response of 1.75% in a selective manner. In contrast, a poor gas response of pristine C₆₀-based composites was found in control measurements. The experimental results are complemented by density functional theory calculations showing that C₆₀Br₂₄ in contact with SWCNTs induces local

SUBMITTER: Zhou J 

PROVIDER: S-EPMC8678982 | biostudies-literature | 2021 Dec

REPOSITORIES: biostudies-literature