ScholarWorks@중앙대학교

초록

The detection of humidity and dew condensation is important in fields such as healthcare, robotics, and agriculture. Despite advances in humidity sensing technology, realizing sensors with real-time monitoring capability, high sensitivity, and a wide sensing range remains challenging. In this study, a graphene oxide (GO)/silk sericin-multiwalled carbon nanotube (SSCNT) humidity sensor for real-time monitoring is fabricated using the spin- assisted layer-by-layer technique, and the dependence of its performance on the number of layers is examined. The GO/SSCNT sensor with the fewest layers exhibits response and recovery times of 1.1 and 6.2 s, respectively, along with a higher responsivity (45 %) than thicker sensors in the relative humidity range of 11 %-97 %. Dew condensation on the sensor causes considerable swelling of the GO/SSCNT film, thereby increasing the sensor's responsivity. Hence, the sensor is suitable for real-time humidity-sensing applications, such as respiration monitoring. Thus, the sensor has the potential to facilitate advances in healthcare, robotics, and agriculture.

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