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A Polyaniline-based Sensor of Nucleic Acids

A Polyaniline-based Sensor of Nucleic Acids

Published on: November 1, 2016

Nucleic acid sensor for insecticide detection.

Pratima R Solanki¹, Nirmal Prabhakar, M K Pandey

¹Biomolecular Electronics and Conducting Polymer Research Group, National Physical Laboratory, Dr K. S. Krishnan Road, New Delhi-110012, India.

Journal of Molecular Recognition : JMR

|May 1, 2008

Summary

This summary is machine-generated.

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A novel nucleic acid sensor using polyaniline (PANI) and DNA can detect pesticides like cypermethrin and trichlorfon quickly. This disposable bioelectrode offers a stable and efficient method for pesticide detection.

Area of Science:

Electrochemistry
Materials Science
Biosensors

Background:

Polyaniline (PANI) is a conductive polymer with potential in electrochemical applications.
Nucleic acid-based biosensors offer high specificity for target analyte detection.
Pesticide contamination in environmental samples necessitates sensitive and rapid detection methods.

Purpose of the Study:

To fabricate a novel nucleic acid sensor for pesticide detection.
To immobilize double-stranded calf thymus (dsCT) DNA onto a polyaniline film.
To evaluate the sensor's performance for detecting cypermethrin and trichlorfon.

Main Methods:

Fabrication of a dsCT-DNA-PANI-ClO(4)/ITO bioelectrode using EDC/NHS chemistry.
Electrochemical characterization using square wave voltammetry and electrochemical impedance spectroscopy.

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Surface morphology and chemical structure analysis via SEM and FTIR.

Main Results:

Successful immobilization of dsCT-DNA onto PANI film confirmed by FTIR and SEM.
The fabricated bioelectrode demonstrated stability for approximately 4 months.
Rapid detection of cypermethrin (0.005 ppm) in 30 seconds and trichlorfon (0.01 ppm) in 60 seconds.

Conclusions:

A disposable and stable dsCT-DNA-PANI-ClO(4)/ITO bioelectrode was developed.
The sensor exhibits efficient detection capabilities for specific pesticides.
This technology holds promise for rapid environmental pesticide monitoring.