We report on the use of a composite of N-doped carbon spheres dispersed with hexadecyltrimethylammonium bromide in poly(vinyl alcohol) as an active material for thin film relative humidity (RH) sensors prepared on interdigitated electrodes (IDEs) with gaps of 0.1 or 0.3 mm. The sensors respond to RH variations in the range 9-97 RH % presenting sensitivity (relative variation of conductance per RH variation) up to 1.7 x 10(3) (IDE with gap of 0.1 mm) and 8.7 x 10(2) (IDE with gap of 0.3 mm). The response times were 19 and 8 s, and the recovery times were 178 and 142 s, respectively.
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City Univ Hong Kong, Dept Elect Engn, Kowloon Tong, Hong Kong, Peoples R ChinaCity Univ Hong Kong, Dept Elect Engn, Kowloon Tong, Hong Kong, Peoples R China
Tang, Qing-Yuan
Chan, Y. C.
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City Univ Hong Kong, Dept Elect Engn, Kowloon Tong, Hong Kong, Peoples R ChinaCity Univ Hong Kong, Dept Elect Engn, Kowloon Tong, Hong Kong, Peoples R China
Chan, Y. C.
Zhang, Kaili
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City Univ Hong Kong, Dept Mfg Engn & Engn Management, Kowloon Tong, Hong Kong, Peoples R ChinaCity Univ Hong Kong, Dept Elect Engn, Kowloon Tong, Hong Kong, Peoples R China
机构:
City Univ Hong Kong, Dept Elect Engn, Kowloon Tong, Hong Kong, Peoples R ChinaCity Univ Hong Kong, Dept Elect Engn, Kowloon Tong, Hong Kong, Peoples R China
Tang, Qing-Yuan
Chan, Y. C.
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机构:
City Univ Hong Kong, Dept Elect Engn, Kowloon Tong, Hong Kong, Peoples R ChinaCity Univ Hong Kong, Dept Elect Engn, Kowloon Tong, Hong Kong, Peoples R China
Chan, Y. C.
Zhang, Kaili
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机构:
City Univ Hong Kong, Dept Mfg Engn & Engn Management, Kowloon Tong, Hong Kong, Peoples R ChinaCity Univ Hong Kong, Dept Elect Engn, Kowloon Tong, Hong Kong, Peoples R China