Recent advances in paper-based preconcentrators by utilizing ion concentration polarization.

Area of Science:

• Biochemical detection
• Microfluidic technology
• Paper-based analytical devices

Background:

• Biochemical detection suffers from poor sensitivity with micro-samples.
• Low-abundance samples require preconcentration for effective microfluidic analysis.
• Ion-concentration polarization (ICP) is a promising technique for microfluidic preconcentration.

Purpose of the Study:

• To review the development and applications of ICP preconcentrators in paper-based microfluidic chips over the last 5 years.
• To emphasize key progresses in chip fabrication and performance optimization.
• To discuss current needs and future prospects in this field.

Main Methods:

• Review of recent literature (past 5 years) on ICP paper-based preconcentrators.
• Analysis of chip fabrication techniques and performance optimization strategies.
• Discussion of challenges and future directions.

Main Results:

• Significant progress in ICP paper-based preconcentrator development.
• Optimization of chip fabrication and performance under various conditions.
• Identification of key advancements and remaining challenges.

Conclusions:

• ICP in paper-based microfluidic chips is a significant advancement for micro-sample preconcentration.
• Continued research is needed to address current limitations and explore future applications.
• This technology holds great promise for sensitive and efficient microfluidic biological analysis.