Development of High-Performance Bismuth Sulfide Nanobelts Humidity Sensor and Effect of Humid Environment on its Transport Properties.

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ID: 39141
2019
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Abstract
Orthorhombic phase bismuth sulfide (BiS) nanobelts were prepared via  liquid-solid phase reaction method. BiS nanobelts were observed to be preferentially oriented along the (101) plane. Direct band gap (2.95 eV) and characteristic wavelength (λ = 342 nm) were extracted through UV-visible spectroscopy. Specific surface area (9.8 m/g) and pore size (2.5-120 nm) were evaluated through Brunauer-Emmett-Teller (BET) analysis. Relative humidity (RH) sensing properties were studied in the range of 11-97% RH at ambient conditions. The response of the sensor increases linearly with increase in RH. Fast response time (8-10 s) and recovery time (15 s) were observed. Reproducible and large response was also observed between 11 and 97% RH. Small hysteresis (<5%) and long-term stability during 30 days were confirmed. As a function of frequency, capacitance, alternating current conductivity, and electrical complex modulus in the frequency range of 20-2 MHz were studied at 11-97% RH. The sensing mechanism was also studied.
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afsar2019developmentacs Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Muhammad Faheem Afsar, M A Rafiq, Arifa Jamil, Sajid Fareed, Fizza Siddique, A I Y Tok, Muhammad Masood Ul Hasan
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Journal ACS omega
Year 2019
DOI
10.1021/acsomega.8b01854
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