Abstract
The present investigation describes a new eco-friendly, low cost material-based approach for sensor device fabrication. In this study, sericin capped zinc oxide nanorod (ZNR)-based H2 gas sensors and UV photodetectors were fabricated by incorporating silk-sericin with ZnO. The proposed sensors have higher sensitivity to H2 and greater photoresponsivity. The sericin capped ZNRs were fabricated from a degummed waste sericin solution using an inexpensive hydrothermal method. The sericin capped ZNRs show excellent H2 gas response (17.8%) and photoresponse with a fast response time under UV illumination due to sericin coating on the surface of the ZnO. Sericin is a water-soluble protein with strong polar groups as side chains, such as carboxyl, amino, and hydroxyl groups, which can easily interact with zinc particles through electrostatic interactions, resulting in the unique and improved ZnO sensor behavior. This interaction was characterized by various analytical techniques and compared with as-grown ZNR. Th...
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