One-Pot Synthesis of a Robust Crosslinker-Free Thermo-Reversible Conducting Hydrogel Electrode for Epidermal Electronics.

Autor: Alsaafeen NB; Department of Biomedical Engineering, Khalifa University, Abu Dhabi 127788, UAE.; Center for Catalysis and Separation, Khalifa University, Abu Dhabi 127788, UAE., Bawazir SS; Department of Biomedical Engineering, Khalifa University, Abu Dhabi 127788, UAE., Jena KK; Department of Biomedical Engineering, Khalifa University, Abu Dhabi 127788, UAE., Seitak A; Department of Biomedical Engineering, Khalifa University, Abu Dhabi 127788, UAE., Fatma B; Department of Physics, Khalifa University, Abu Dhabi 127788, UAE., Pitsalidis C; Department of Physics, Khalifa University, Abu Dhabi 127788, UAE.; Healthcare Engineering Innovation Center, Khalifa University, Abu Dhabi 127788, UAE., Khandoker A; Department of Biomedical Engineering, Khalifa University, Abu Dhabi 127788, UAE.; Healthcare Engineering Innovation Center, Khalifa University, Abu Dhabi 127788, UAE., Pappa AM; Department of Biomedical Engineering, Khalifa University, Abu Dhabi 127788, UAE.; Healthcare Engineering Innovation Center, Khalifa University, Abu Dhabi 127788, UAE.; Center for Catalysis and Separation, Khalifa University, Abu Dhabi 127788, UAE.
Jazyk: angličtina
Zdroj: ACS applied materials & interfaces [ACS Appl Mater Interfaces] 2024 Nov 13; Vol. 16 (45), pp. 61435-61445. Date of Electronic Publication: 2024 Jan 12.
DOI: 10.1021/acsami.3c10663
Abstrakt: Traditional epidermal electrodes, typically made of silver/silver chloride (Ag/AgCl), have been widely used in various applications, including electrophysiological recordings and biosignal monitoring. However, they present limitations due to inherent material mismatches with the skin. This often results in high interface impedance, discomfort, and potential skin irritation, particularly during prolonged use or for individuals with sensitive skin. While various tissue-mimicking materials have been explored, their mechanical advantages often come at the expense of conductivity, resulting in low-quality recordings. We herein report the facile fabrication of conducting and stretchable hydrogels using a "one-pot" method. This approach involves the synthesis of a natural hydrogel, termed Golde , composed of abundant and eco-friendly components, including gelatin, chitosan, and glycerol. To enhance the conductivity of the hydrogel, various conducting materials, such as poly(3,4-ethylenedioxythiophene) polystyrenesulfonate (PEDOT:PSS), thermally reduced graphene (TRG), and MXene, are introduced. The resulting conducting hydrogels exhibit remarkable robustness, do not require crosslinkers, and possess a unique thermo-reversible property, simplifying the fabrication process and ensuring enhanced long-term stability. Moreover, their fabrication is sustainable, as it employs environmentally friendly materials and processes while retaining their skin-friendly characteristics. The resulting hydrogel electrodes were tested for electrocardiogram (ECG) signal acquisition and outperformed commercial electrodes even when implemented in an all-flexible electrode setup simply using copper tape, owing to their inherent adhesiveness.
Databáze: MEDLINE