Conductive Polymer-Based Hydrogels for Wearable Electrochemical Biosensors

Area of Science:

• Materials Science
• Biomedical Engineering
• Electrochemistry

Background:

• Hydrogels are increasingly used in wearable electronics due to their biocompatibility and flexibility.
• Conductive polymer hydrogels (CP HGs) are particularly promising for wearable sensor design.
• Current challenges include limited sensing range, hysteresis, dehydration, and interfacial issues.

Purpose of the Study:

• To review recent advancements in polymer-hydrogel-based wearable electrochemical biosensors over the last five years.
• To explore the fabrication and conductivity mechanisms of nanocomposite conductive polymer hydrogels.
• To assess the readiness of these materials for point-of-care applications and wearable sensing technology.

Main Methods:

• Literature review of polymer-hydrogel-based wearable electrochemical biosensors.
• Analysis of nanomaterial integration (metals, metal oxides, carbon-based) for non-enzymatic sensing.
• Evaluation of conductivity mechanisms in nanocomposite conductive polymer hydrogels.

Main Results:

• Polymer-hydrogel sensors have evolved from biomolecule carriers to versatile platforms, including non-enzymatic sensors.
• Nanomaterial integration enhances sensor capabilities.
• Understanding conductivity mechanisms is crucial for performance optimization.

Conclusions:

• Significant progress has been made in polymer-hydrogel-based wearable electrochemical biosensors.
• Nanocomposite conductive polymer hydrogels offer tunable properties for advanced sensing.
• Further development is needed to overcome existing challenges for clinical translation.