Biocompatible, Flexible, and High-Performance Nanowelded Silver Nanowires on Silk Fibroin for Transparent Conducting Electrodes toward Biomemristor Application

Yalagala, Bhavani Prasad and Rengan, Aravind Kumar and Vanjari, Siva Rama Krishna and et al, . (2022) Biocompatible, Flexible, and High-Performance Nanowelded Silver Nanowires on Silk Fibroin for Transparent Conducting Electrodes toward Biomemristor Application. ACS Sustainable Chemistry & Engineering, 10 (14). pp. 4473-4485. ISSN 2168-0485

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Abstract

This paper demonstrates a facile methodology for fusing silver nanowires (AgNWs) at the nanoscale using a simple, cost-effective UV-ozone treatment. The fusing process not only resulted in interesting morphologies but also reduced the sheet resistance from 100 to 15 ω/sq. The process optimization ensued in the fusion of AgNWs at the edges with different bending angles that lie between 100 and 140°. The mechanism behind the fusing was elucidated primarily using high-resolution transmission electron microscopy analysis. The optimized process was replicated on top of a silk-poly(vinyl)alcohol (S-PVA) composite that is proven to be thermally stable, flexible, transparent, and biocompatible. This unique combination of fused AgNWs on top of S-PVA is a viable, cost-effective, and scalable prototype for flexible transparent conducting electrodes (FTCEs). A flexible biomemristor was fabricated using ZnO nanoparticles as an active layer and gold and AgNWs as top and bottom electrodes, respectively. The fabricated biomemristor on S-PVA exhibited oxygen vacancy-based RScharacteristics at a lower set/reset voltage of +0.25 V/-1 V with an excellent ROFF/RONratio of 3.5 × 103, higher switching endurance of 500 cycles, and stable data retention of greater than 104seconds. The strategy outlined here provides a simple, facile, and best optimized solution for the preparation of high-performance and biocompatible FTCEs for the next-generation wearable optoelectronic and biomedical devices. © 2022 American Chemical Society. All rights reserved.

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IITH Creators:
IITH CreatorsORCiD
Rengan, Aravind Kumarhttps://orcid.org/0000-0003-3994-6760
Vanjari, Siva Rama Krishnahttps://orcid.org/0000-0002-5880-4023
Item Type: Article
Additional Information: The authors are very thankful to the IIT Hyderabad for providing the central facility innovation hub for the Nano-X laboratory to carry out some part of the currently reported work (silk preparation and fabrication of devices).
Uncontrolled Keywords: bio-memristor; biocompatible; flexible; nanowires; oxygen vacancy; silk; transparent; UV-ozone; wearable
Subjects: Electrical Engineering
Biomedical Engineering
Divisions: Department of Biomedical Engineering
Department of Electrical Engineering
Depositing User: . LibTrainee 2021
Date Deposited: 13 Jul 2022 10:38
Last Modified: 13 Jul 2022 10:38
URI: http://raiith.iith.ac.in/id/eprint/9465
Publisher URL: http://doi.org/10.1021/acssuschemeng.1c08227
OA policy: https://v2.sherpa.ac.uk/id/publication/27876
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