Related Experiment Video
Updated: Jun 7, 2026
07:13
Fluorescent Lateral Flow Immunoassay Based on Quantum Dots Nanobeads
Published on: June 28, 2024
Lateral flow nucleic acid biosensor for Cu2+ detection in aqueous solution with high sensitivity and selectivity.
Zhiyuan Fang1, Jing Huang, Puchang Lie
1South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou 510663, China.
Chemical Communications (Cambridge, England)
|November 6, 2010
Summary
A novel biosensor detects copper ions (Cu2+) using DNAzyme and gold nanoparticles. This visual method achieves a low detection limit of 10 nM in water.
Area of Science:
- Analytical Chemistry
- Biochemistry
- Nanotechnology
Background:
- Copper ions (Cu2+) are essential but toxic at elevated levels.
- Accurate detection of Cu2+ is crucial for environmental and biological monitoring.
- Existing detection methods can be complex or require specialized equipment.
Purpose of the Study:
- To develop a simple, visual, and sensitive method for Cu2+ detection.
- To utilize a DNAzyme-based approach integrated with nanotechnology.
Main Methods:
- Development of a lateral flow nucleic acid biosensor.
- Incorporation of a copper-dependent DNA-cleaving DNAzyme.
- Utilisation of gold nanoparticles for signal amplification and visual readout.
Main Results:
- The biosensor demonstrated visual detection of Cu2+ in aqueous solutions.
- A low detection limit of 10 nM for Cu2+ was achieved.
- The system relies on the DNAzyme's ability to cleave DNA in the presence of Cu2+.
Conclusions:
- A sensitive and visual lateral flow biosensor for Cu2+ detection was successfully developed.
- The integration of DNAzyme and gold nanoparticles offers a promising platform for rapid ion sensing.
- This method provides a simple and effective tool for monitoring copper ion levels.
