Abstract
A composite based on the conductive polymer PEDOT:PSS and unique graphene flakes has been developed, which can be used in various health monitoring technologies. Graphene’s unique properties are due to the dry synthesis method. Using plasma generated by a direct current plasma torch at 350 Torr, the flakes were produced in uniform sizes. Modes for producing nanostructures with a minimum lateral size of 100 nm have been developed. A technique has been suggested for preparing the nanostructure suspension for two-dimensional (2D) printing of active films on substrates. The printed structures were tested as wearable sensors for human sweat glucose, and exhaled air analysis, as well as humidity and touch sensors. The possibility of analysis of various solutions using such sensor substrates as non-woven fabric (spunlace) and polycarbonate fishing line has been demonstrated. As a result, simple and accessible diagnostics of the human nervous system and detection of enhanced reactions to various external influences are offered. In the systems presented, the sensor conductivity surges in response to the chemical reactions occurring between the graphene surface and the liquid components. In general, due to the use of plasma-synthesized flakes, sensors that combine the simplicity and low production cost technology with high sensitivity have been manufactured.
Funding
1. the Russian Science Foundation - grant No. 25-19-20035, 30-2025-000863
2. the Ministry of Science and Higher Education of the Russian Federation - State Assignments No. 075-00269-25-00 and FWGW 2025-0022