Recent progress of 3D-printed polymeric gel sensors for flexible electronics

Area of Science:

• Materials Science
• Biomedical Engineering
• Polymer Chemistry

Background:

• Solvent-impregnated polymeric gels offer tunable properties and biocompatibility, making them ideal for flexible sensors.
• These gel sensors can detect various health stimuli, enabling point-of-care diagnostics and advanced human-machine interfaces.
• Efficient and precise manufacturing techniques are crucial for developing reliable gel sensor devices.

Purpose of the Study:

• To review the materials and applications of additive three-dimensional (3D) printed gel sensors.
• To provide a foundational understanding of polymeric gel properties and classifications.
• To compare key characteristics of direct ink writing and digital light processing for gel sensor fabrication.

Main Methods:

• Review of existing literature on polymeric gels, 3D printing techniques, and gel sensor applications.
• Classification and physical property analysis of polymeric gels.
• Comparative analysis of direct ink writing and digital light processing for 3D printing gel sensors.

Main Results:

• 3D printing, particularly direct ink writing and digital light processing, offers high efficiency and precision for fabricating gel sensors.
• Polymeric gels exhibit tunable properties and mechanical compatibility with biological tissues, suitable for flexible sensor applications.
• Diverse application scenarios for gel-based sensors were summarized, demonstrating their versatility.

Conclusions:

• Additive 3D printing is a key enabling technology for the development of advanced gel sensors.
• Further research is needed to address current limitations and explore future directions in 3D-printed gel sensor technology.
• 3D-printed gel sensors hold significant promise for diagnostics, prosthetics, and wearable electronics.