Ultrafast Response Humidity Sensor Based on Electrospun Porous BaTiO₃ Nanofibers

Abstract:

Nanocrystalline and porous barium titanate (BaTiO3) nanofibers with diameter 200-400 nm were synthesized via electrospinning and followed calcinations. The morphology and microstructure of the nanofibers were characterized using field emission scanning electron microscope, X-ray diffractometer and transmission electron microscope, respectively. And the electrical and humidity sensing properties of the nanofibers were also measured. The results reveal that the BaTiO3 nanofibers have a conductivity of about 0.3 S/cm, and show an ultrafast response time (~0.7 s) and a recovery time (~0.4 s) to humidity at room temperature. In addition, the sensing mechanism was also discussed briefly based on its nanocrystalline and porous microstructure of the electrospun material.

• Periodical: Applied Mechanics and Materials (Volume 319)
• Pages: 43-48
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.319.43
• Online since: May 2013
• Authors: Hong Di Zhang, Chen Hao Sheng, Bin Sun, Yun Ze Long
• Keywords: Electro-Spinning, Humidity Sensitivity, Porous Barium Titanate Nanofibers

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