A Capacitive Humidity Sensor Based on Multi-Wall Carbon Nanotubes (MWCNTs).
A Capacitive Humidity Sensor Based on Multi-Wall Carbon Nanotubes (MWCNTs).
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DOI:
10.3390/s90907431
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发表时间:
2009
期刊:
影响因子:
--
通讯作者:
Suo CG
中科院分区:
文献类型:
--
作者:
Chen WP;Zhao ZG;Liu XW;Zhang ZX;Suo CG
A new type of capacitive humidity sensor is introduced in this paper. The sensor consists of two plate electrodes coated with MWCNT films and four pieces of isolating medium at the four corners of the sensor. According to capillary condensation, the capacitance signal of the sensor is sensitive to relative humidity (RH), which could be transformed to voltage signal by a capacitance to voltage converter circuit. The sensor is tested using different saturated saline solutions at the ambient temperature of 25 °C, which yielded approximately 11% to 97% RH, respectively. The function of the MWCNT films, the effect of electrode distance, the temperature character and the repeatability of the sensor are discussed in this paper.
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影响因子:
5.2
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