The development of an Inkjet Printable Sensing Material for NO2
Date Issued
2015
Date
2015
Author(s)
Wang, Wei
Abstract
Nitrogen dioxide(NO2) is a severe air pollutant. It is a significant problem to detect the concentration of nitrogen dioxide for an eco-friendly environment. In 1990''s, researchers had developed a NO2 sensor that made by organic material. It had the advantage of simple process, low cost and low operation temperature. In this paper, our group has set up an inkjet printing system that operate at room temperature. We use this system to develop a NO2 sensor by polypyrrole on gold electrode. However, the common polypyrrole solvent is toxic, we have to print ferric chloride and pyrrole monomer separately and synthesis on the chip. By adding Al-doped zinc oxide(AZO) and ferric oxide, the sensor''s stability and sensitivity is improving. Also, the effect of humidity is also discussed. If different sensing materials is printed on one chip, each sensor can calibrate with each other to solve the selectivity problem. The gas sensors have big potential in various application.
Subjects
NO2 sensor
inkjet printing
polypyrrole
Type
thesis
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ntu-104-R02943105-1.pdf
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