Hydrogel-Based Biosensors.

Area of Science:

• Materials Science
• Analytical Chemistry
• Biomedical Engineering

Background:

• Conventional sensing methods struggle in humid conditions and require complex equipment.
• Hydrogel sensors are emerging as a promising alternative due to ease of fabrication, high sensitivity, and broad dynamic ranges.
• Their robustness, reliability, and reusability support long-term applications in diverse fields.

Purpose of the Study:

• To explore current research on hydrogel-based sensors for aqueous environments.
• To highlight applications in biomedical diagnostics, pharmaceutical detection, and environmental contaminant analysis.
• To discuss the potential of hydrogels for analyte adsorption and removal.

Main Methods:

• Utilizing hydrogels with specific analyte adsorption capabilities.
• Employing molecularly imprinted polymers for enhanced specificity.
• Detection principles include optical methods (fluorescence, chemiluminescence) and electrochemical methods, as well as volume changes in colloidal photonic crystals.

Main Results:

• Hydrogel sensors demonstrate significant potential in biomedical, pharmaceutical, and environmental sensing.
• The ability of hydrogels to adsorb analytes enables their removal from aqueous environments.
• High specificity is achievable through molecular imprinting techniques.

Conclusions:

• Hydrogel-based sensors are versatile tools for analyte detection and quantification in aqueous systems.
• These sensors offer advantages over conventional methods, particularly in challenging environments.
• Future applications are promising across healthcare, drug analysis, and environmental protection.