DRY ELECTRODES BASED ON HYBRID NANOSTRUCTURES OF CARBON NANOTUBES AND REDUCED GRAPHENE OXIDE FOR ECG MONITORING
A.V. Kuksin1, A.S. Morozova1, A.Yu. Gerasimenko1,2; 1National Research University of Electronic Technology MIET, Shokin Square 1, 124498 Zelenograd, Moscow, Russia; 2I.M. Sechenov First Moscow State Medical University, Bolshaya Pirogovskaya street 2-4, 119991 Moscow, Russia.
Abstract
The development of domestic electronics creates a demand for new electronic component bases. Carbon nanomaterials are recognized as the most suitable and efficient candidates for developing advanced materials for various devices. Among the most promising carbon nanomodifications are one-dimensional carbon structures – carbon nanotubes and two-dimensional carbon nanomaterial – graphene with its derivatives. These materials have found widespread use in flexible and solid-state electronics. We have developed a method for producing dry electrodes based on hybrid nanostructures. These nanostructures consist of single-walled carbon nanotubes (SWCNT) and reduced graphene oxide (RGO). They are formed in a polydimethylsiloxane matrix under pulsed laser irradiation at 1064 nm wavelength. Electrical conductivity studies confirmed improved conductivity resulting from the formation of hybrid nanostructures. Impedance measurements before and after exposure to artificial sweat solution demonstrated superior stability of the developed electrodes compared to conventional Ag/AgCl electrodes. Electrocardiography (ECG) signals recorded with developed electrodes matched the quality of signals obtained with Ag/AgCl electrodes. The absence of a gel layer in SWCNT/RGO-based dry electrodes provides a key advantage. Unlike commercial gel-based electrodes, their performance doesn't degrade during prolonged use due to gel deterioration. Biocompatibility studies were conducted by culturing human embryonic fibroblast cells on the electrode surface. Post-incubation observations revealed numerous adhered and proliferated cells. These results indicate high biocompatibility of SWCNT/RGO-based electrodes, making them suitable for long-term skin contact applications.
The study was supported by the Russian Science Foundation (RSF No. 25-29-00938 dated 12/26/2024).
Speaker
Artem Kuksin
National Research University of Electronic Technology MIET
Russia
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