“School of Nano-Sciences”
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| Paper IPM / Nano-Sciences / 17245 |
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Triboelectric nanogenerator (TENG)-based devices have been considered as a feasible strategy for developing the
next generation of self-powered wearable biomedical and healthcare systems. To this end, their antibacterial
properties play a key role for gauging their potential for practical applications. Herein, a polypyrrole-graphene
oxide (PPy-GO) composite TENG with superior electrical outputs and bactericidal activity is developed by a facile
electrodeposition route. The final performance of the TENG can be fine-tuned by controlling electrochemical
polymerization conditions as well as the amount of GO nanosheets in the composite layer. Experimental results
reveal that the addition of GO to the polymer layer can significantly enhance the triboelectric effect of the
electrodes, which was further confirmed by computational modeling. Under optimal conditions, the open-circuit
voltage and short-circuit current were obtained as 413.2 V and aproximately 41 muA, respectively. Marked bactericidal
activity was evident for the composite electrode. The antibacterial mechanism was comprehensively investigated
through morphological studies, along with qualitative and quantitative measurements for the generation of
reactive oxygen species (ROS). The results demonstrate that the synergistic effect of the presence of GO nanosheets and TENG-based electrical stimulations resulted in improvements in ROS generation and S. aureus cellular
membrane rupture as the bacterial model.
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