Related Experiment Video
Updated: Jul 17, 2025
07:58
A Polyaniline-based Sensor of Nucleic Acids
Published on: November 1, 2016
8.1K
Liquid crystal based sensor for antimony ions detection using poly-adenine oligonucleotides
Xiyun Zhan1, Kun-Lin Yang2, Dan Luo3
1Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Xueyuan Road 1088, Shenzhen, 518055, China; Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore, 117576, Singapore.
Talanta
|September 7, 2023
Summary
A new liquid crystal sensor rapidly detects toxic antimony ions (Sb3+) using a unique oligonucleotide probe. This low-cost, highly selective method offers real-time monitoring for environmental and industrial water safety.
Area of Science:
- Environmental Science
- Analytical Chemistry
- Materials Science
Background:
- Antimony is a toxic heavy metal and a significant water pollutant.
- Current antimony detection methods are often complex, costly, and unsuitable for real-time monitoring.
- Accurate and rapid detection of antimony ions (Sb3+) is crucial for environmental and health safety.
Purpose of the Study:
- To develop a novel, label-free, and rapid sensing method for antimony ions (Sb3+).
- To utilize liquid crystals and a poly-adenine oligonucleotide probe for Sb3+ detection.
- To create a cost-effective and sensitive sensor for real-time antimony monitoring.
Main Methods:
- A liquid crystal-based sensor was designed using a 10-mer poly-adenine oligonucleotide as a specific recognition probe for Sb3+.
- The sensor operates by detecting changes in liquid crystal orientation caused by the binding of Sb3+ to the oligonucleotide.
- Optical changes under crossed polars indicate the presence and concentration of Sb3+.
Main Results:
- The sensor demonstrated a rapid response time of 10 seconds for Sb3+ detection.
- A wide detection range from 20 nM to 5 μM was achieved, with a low detection limit of 6.7 nM.
- The system exhibited excellent selectivity against various other metal ions and robustness in solutions with varying pH and ionic strengths.
Conclusions:
- A simple, fast, and low-cost liquid crystal-based sensor for Sb3+ detection has been successfully developed.
- The sensor offers high sensitivity and selectivity, making it suitable for real-time monitoring.
- This approach holds significant potential for detecting Sb3+ in natural water bodies and industrial wastewater.
