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    In this paper, we propose a novel bio-compatible organic humidity sensor based on natural inner egg shell membrane (IESM) with multilayer cross linked fiber structure that can be used as a substrate as well as a sensing active layer. To fabricate the proposed sensors, two different size inter digital electrodes (IDEs) with 10 mm × 4 mm for sensor 1 and 12 mm × 6 mm for sensor 2 are printed on the surface of the IESM through Fujifilm Dimatix DMP 3000 inkjet material printing setup, which have finger width of 100 μm and space of 100 μm. The fabricated sensors stably operates in a relative humidity (RH) range between 0% RH to 90% RH, and its output impedance and capacitance response are recorded at 1 kHz and 10 kHz. The response time (Tres) and recovery time (Trec) of sensor 1 are detected as ~1.99 sec and ~8.76 sec, respectively and the Tres and Trec of sensor 2 are recorded as ~2.32 sec and ~9.21 sec, respectively. As the IESM for the humidity sensor, the natural materials can be implemented in our daily life as they open a new gate way for bio-compatible devices.

    Citation

    Muhammad Umair Khan, Gul Hassan, Jinho Bae. Bio-compatible organic humidity sensor based on natural inner egg shell membrane with multilayer crosslinked fiber structure. Scientific reports. 2019 Apr 09;9(1):5824

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    PMID: 30967610

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