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Surface Field Effect-Enhanced Cu-Doped W18O49 Nanowires for Fast Response H2S Sensors
Lingli Ji1, Jie Sun1, Baijing Li1
1The Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, P. R. China.
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Accurately detecting hydrogen sulfide in the environment and monitoring its pollution sources are crucial for pollution assessment and personal safety. However, rapid detection is a challenge due to the influence of carrier behavior and surface adsorption states. In this paper, Cu-doped W18O49 nanowires were synthesized by the solvothermal method. The surface field effect phenomenon resulting from doping and H2S adsorption enables a rapid response to H2S with significantly improved responsivity. We characterized the material's structure and properties by SEM, TEM, and XRD techniques, verified the surface microelectric field effect by combining XPS and field effect device in situ gas sensing characterization, and discussed the sensitive mechanism of hydrogen sulfide.
