Sajid Memoon, Aziz Shahid, Kim Go Bum, Kim Soo Wan, Jo Jeongdai, Choi Kyung Hyun
Department of Mechatronics Engineering, Jeju National University, Jeju 690-756, South Korea.
Korean Institute of Machinery and Materials, Yuseong-Gu, Daejeon 305-343, Republic of Korea.
Sci Rep. 2016 Jul 20;6:30065. doi: 10.1038/srep30065.
A bio-compatible disposable organic humidity sensor has been fabricated that can be transferred to any arbitrary target surface. Single cell thick onion membrane has been used as the substrate while it also doubles as the active layer of the sensor. Two different types of sensors were fabricated. In type-1, the membrane was fixed into a plastic frame with IDT patterns on one side while the other side was also exposed to environment. In type-2, onion membrane was attached to a glass substrate with one side exposed to environment having an IDT screen-printed on top of it. The electrical output response of the sensors showed their ability to detect relative humidity between 0% RH and 80% RH with stable response and good sensitivity. The impedance of the sensors changed from 16 MΩ to 2 MΩ for type-1 and 6 MΩ to 20 KΩ for type-2. The response times of type-1 and type-2 were ~1 and 1.5 seconds respectively. The recovery times were ~10.75 seconds and ~11.25 seconds for type-1 and type-2 respectively. The device was successfully transferred to various randomly shaped surfaces without damaging the device.
已制造出一种生物相容性一次性有机湿度传感器，该传感器可转移到任何任意目标表面。单细胞厚的洋葱膜被用作基板，同时它还兼作传感器的活性层。制造了两种不同类型的传感器。在类型1中，膜被固定在一侧带有IDT图案的塑料框架中，而另一侧也暴露于环境中。在类型2中，洋葱膜附着在玻璃基板上，一侧暴露于环境中，顶部丝网印刷有IDT。传感器的电输出响应表明它们能够检测0%RH至80%RH之间的相对湿度，响应稳定且灵敏度良好。类型1传感器的阻抗从16MΩ变为2MΩ，类型2传感器的阻抗从6MΩ变为20KΩ。类型1和类型2的响应时间分别约为1秒和1.5秒。类型1和类型2的恢复时间分别约为10.75秒和11.25秒。该装置已成功转移到各种形状随机的表面，且未损坏装置。
