Adaptable Xerogel-Layered Amperometric Biosensor Platforms on Wire Electrodes for Clinically Relevant Measurements

Area of Science:

• Electrochemistry
• Biomaterials Science
• Medical Diagnostics

Background:

• Development of clinically relevant in vitro and in vivo biosensors requires adaptable materials, miniaturization, and functionality in bodily fluids.
• Amperometric biosensors are crucial for detecting various analytes, but challenges remain in their clinical application.

Purpose of the Study:

• To demonstrate a general scheme for amperometric biosensors using layer-by-layer electrode modification.
• To create adaptable biosensors suitable for point-of-care medical tools and continuous monitoring.
• To showcase the potential for diagnosing conditions like diabetes, preeclampsia, and sepsis.

Main Methods:

• Layer-by-layer electrode modification with enzyme-doped xerogels, electrochemically-deposited polymer, and polyurethane semi-permeable membranes.
• Miniaturization of sensing schemes to wire electrodes.
• Demonstration of sensor functionality in synthetic urine and blood serum.
• Incorporation of platinum nanoparticle film for signal enhancement.

Main Results:

• The developed biosensor scheme is sensitive and selective for multiple analytes with minor material modifications.
• Sensors demonstrated functionality in clinically relevant matrices like synthetic urine and blood serum.
• Platinum nanoparticle incorporation provided additional design control and signal enhancement.

Conclusions:

• The presented biosensing strategy is adaptable for detecting various diseases linked to specific biomolecules and oxidase enzymes.
• These biosensors represent a significant step toward clinically relevant, miniaturized sensors for faster and more accurate diagnoses.
• The technology holds potential for bedside measurements and continuous monitoring, improving patient care.