Ionic Passivation and Oxidation Dynamics for Enhanced Viability of Copper-Based On-Skin Bioelectrodes in Biological Environments
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The integration of bioelectronic devices with the skin is a promising strategy for personalized healthcare monitoring anddiagnostics. On-skin bioelectrodes hold great potential for the real-time tracking of physiological parameters. However, persistentchallenges of stability and reliability have instigated exploration beyond conventional noble metals. This studyfocuses on the ionic passivation and oxidation dynamics of copper-based on-skin thin-film bioelectrodes. Through parylenechemical vapor deposition, we harness a controlled thin film of parylene insulation to counter the intrinsic susceptibility ofcopper to oxidation in the ionic environment. The results represent the relationship among the parylene insulation thickness,copper oxidation, and electrode impedance over temporal intervals. Comparative analyses indicate that the short-term stabilityof the copper electrode is comparable to that of the gold electrode. Therefore, we propose a cost-effective strategyfor fabricating copper-based on-skin bioelectrodes by introducing enhanced ionic stability within a discernible operationaltimeframe. This study enriches our understanding of on-skin bioelectronics and affordable material choices for practical usein wearable healthcare devices
Abstract
The integration of bioelectronic devices with the skin is a promising strategy for personalized healthcare monitoring anddiagnostics. On-skin bioelectrodes hold great potential for the real-time tracking of physiological parameters. However, persistentchallenges of stability and reliability have instigated exploration beyond conventional noble metals. This studyfocuses on the ionic passivation and oxidation dynamics of copper-based on-skin thin-film bioelectrodes. Through parylenechemical vapor deposition, we harness a controlled thin film of parylene insulation to counter the intrinsic susceptibility ofcopper to oxidation in the ionic environment. The results represent the relationship among the parylene insulation thickness,copper oxidation, and electrode impedance over temporal intervals. Comparative analyses indicate that the short-term stabilityof the copper electrode is comparable to that of the gold electrode. Therefore, we propose a cost-effective strategyfor fabricating copper-based on-skin bioelectrodes by introducing enhanced ionic stability within a discernible operationaltimeframe. This study enriches our understanding of on-skin bioelectronics and affordable material choices for practical usein wearable healthcare devices
참고문헌 (3)
- T. Someya, "The rise of plastic bioelectronics", Nature, 540(7633), pp.379~385 (2016)
- K. Liu, "Skin-inspired electronics enabled by supramolecular polymeric materials", CCS Chem, 1(4), pp.431~447 (2019)
- T. Someya, "Toward a new generation of smart skins", Nat. Biotechnol, 37(4), pp.382~388 (2019)