Molecularly specific detection towards trace nitrogen dioxide by utilizing Schottky-junction-based Gas Sensor.

ABSTRACT: Trace NO₂ detection is essential for the production and life, where the sensing strategy is appropriate for rapid detection but lacks molecular specificity. This investigation proposes a sensing mechanism dominated by surface-scattering to achieve the molecularly-specific detection. Two-dimensional Bi₂O₂Se is firstly fabricated into a Schottky-junction-based gas-sensor. Applied with an alternating excitation, the sensor simultaneously outputs multiple response signals (i.e., resistance, reactance, and the impedance angle). Their response times are shorter than 200 s at room temperature. In NO₂ sensing, these responses present the detection limit in ppt range and the sensitivity is up to 16.8 %·ppb^-1. This NO₂ sensitivity pre

SUBMITTER: Xu S 

PROVIDER: S-EPMC11252297 | biostudies-literature | 2024 Jul

REPOSITORIES: biostudies-literature