Hofmeister-Effect-Guided Ionohydrogel Design as Printable Bioelectronic Devices

Area of Science:

• Bioelectronic engineering
• Materials science
• Biochemistry

Background:

• Traditional bioelectronic platforms face challenges with complex manufacturing, poor tissue-machine integration, and enzyme denaturation.
• Biocatalysts are crucial for bio-signal detection but are sensitive to denaturation in ionic solutions.

Purpose of the Study:

• To develop a stable and biocompatible ionohydrogel bioelectronic platform.
• To overcome limitations of traditional materials and improve bioelectronic device performance.

Main Methods:

• Synthesized an ionohydrogel using hydrated ionic liquids (HILs) as a solvent and bioprotectant.
• Utilized the Hofmeister effect of HILs to enhance enzyme stability and polymer properties.
• Incorporated hydrogen bonding for improved water retention.

Main Results:

• The ionohydrogel platform mimics extracellular matrix, integrating ionic and enzymatic electronic circuits.
• HILs maintained high enzyme bioactivity and improved ionohydrogel mechanical properties.
• Enhanced water retention was achieved through hydrogen bonding.

Conclusions:

• The developed ionohydrogel offers a promising biomimetic material for advanced bioelectronic applications.
• Fabricated wearable devices demonstrated potential for pain-free monitoring of humoral components and wireless motion sensing.