Self-Powered Wireless Affinity-Based Biosensor Based on Integration of Paper-Based Microfluidics and Self-Assembled...

Area of Science:

• Biosensor Technology
• Microfluidics
• Radio-Frequency Identification (RFID)

Background:

• Traditional analyte detection methods face limitations in continuous monitoring, especially in complex environments like food supply chains.
• Integrating microfluidics with RF antenna technology offers a pathway to novel, self-powered sensing solutions.

Purpose of the Study:

• To develop a wireless, self-powered, affinity-based biosensor.
• To integrate paper-based microfluidics with self-assembling radio-frequency (RF) antennas.
• To demonstrate continuous analyte monitoring in a food supply chain setting.

Main Methods:

• Utilized a silver-enhancement technique to grow RF antenna portions in antigen-hybridization regions.
• Employed nitrocellulose-based microfluidic channels for self-powered sample handling and reagent control.
• Fabricated the biosensor on a polyethylene substrate using inkjet printing and integrated passive RFID tags.

Main Results:

• Successfully demonstrated a proof-of-concept wireless, self-powered biosensor-tag.
• Validated the sensor's functionality using Immunoglobulin G (IgG) as a model analyte.
• Utilized 915 MHz Ultra-High-Frequency (UHF) RFID technology for data transmission and continuous monitoring.

Conclusions:

• The developed biosensor offers a promising solution for continuous, real-time analyte monitoring in challenging environments.
• The integration of paper microfluidics, self-assembling RF antennas, and RFID technology enables practical applications in food safety and supply chain management.