Electrochemical Aptasensors: Current Status and Future Perspectives

Area of Science:

• Electrochemistry
• Biosensors
• Biomarker Detection

Background:

• Electrochemical aptasensors offer sensitive detection of target analytes.
• Aptamers, as recognition elements, provide high specificity and stability.
• Advancements in aptasensor design are crucial for diagnostics.

Purpose of the Study:

• To review the diverse progress in electrochemical aptasensor development.
• To discuss aptamer immobilization strategies and assay platforms.
• To emphasize applications in detecting clinically important biomarkers.

Main Methods:

• Review of literature on electrochemical aptasensor fabrication and detection principles.
• Analysis of various aptamer immobilization techniques on electrode surfaces.
• Categorization of aptasensors based on assay formats (e.g., sandwich, competitive, label-free).

Main Results:

• Diverse immobilization strategies enhance aptasensor performance.
• Assay platforms include conventional and novel 'signal-on'/'signal-off' designs.
• Label-free aptasensors demonstrate promising label-free detection capabilities.
• Significant applications exist for detecting clinical biomarkers.

Conclusions:

• Electrochemical aptasensors are versatile tools for analyte detection.
• Continued innovation in immobilization and assay design is advancing the field.
• The technology holds great potential for point-of-care diagnostics and clinical monitoring.