Related Experiment Video
Updated: Feb 24, 2026
Development of a Lateral Flow Immunochromatographic Strip for Rapid and Quantitative Detection of Small Molecule Compounds
Published on: November 13, 2021
A novel label-free electrochemical immunosensor based on aldehyde-terminated ionic liquid.
Youming Shen1, Guangyu Shen2, Youyu Zhang3
1Hunan Province Cooperative Innovation Center for The Construction & Development of Dongting Lake Ecological Economic Zone, College of Chemistry and Material Engineering, Hunan University of Arts and Science, Changde 415000, PR China; Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, PR China.
A novel electrochemical immunosensor was developed using aldehyde-functionalized ionic liquid for sensitive detection of hepatitis B surface antigen. This label-free sensor offers a promising tool for clinical diagnostics.
Area of Science:
- Electrochemistry
- Biosensors
- Immunotechnology
Background:
- Hepatitis B virus (HBV) infection poses a significant global health challenge.
- Accurate and rapid detection of hepatitis B surface antigen (HBsAg) is crucial for diagnosis and management.
- Existing diagnostic methods may have limitations in terms of speed, cost, or sensitivity.
Purpose of the Study:
- To synthesize aldehyde-terminated ionic liquid for biosensor fabrication.
- To develop a novel label-free electrochemical immunosensor for HBsAg determination.
- To evaluate the sensor's performance characteristics, including sensitivity, selectivity, stability, and reproducibility.
Main Methods:
- Synthesis of aldehyde-functionalized ionic liquid.
- Modification of a gold electrode with a composite film of ionic liquid, Nafion, and anti-HBsAg antibodies.
- Fabrication of a label-free electrochemical immunosensor.
- Electrochemical characterization and performance evaluation for HBsAg detection.
Main Results:
- The fabricated immunosensor demonstrated high electrical conductivity and simplified sensor construction.
- A linear detection range for HBsAg was established from 0.05 to 15 ng/mL.
- The sensor achieved a low detection limit of 20 pg/mL (S/N=3).
- Satisfactory stability, selectivity, and reproducibility were observed.
Conclusions:
- Aldehyde-functionalized ionic liquid serves as an effective material for antibody immobilization and enhances sensor performance.
- The developed label-free electrochemical immunosensor offers a sensitive and reliable method for HBsAg detection.
- This novel strategy presents a promising approach for clinical diagnosis of hepatitis B.
