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Fabrication of Carbon Nanotube High-Frequency Nanoelectronic Biosensor for Sensing in High Ionic Strength Solutions
Published on: July 22, 2013
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β-Cyclodextrin carbon nanotube-enhanced sensor for ciprofloxacin detection
Jorge M P J Garrido1,2, Manuel Melle-Franco3, Karol Strutyński3
1a Department of Chemical Engineering , School of Engineering (ISEP), Polytechnic of Porto , Porto , Portugal.
Summary
A novel electrochemical sensor using modified glassy carbon electrodes detects ciprofloxacin with high sensitivity. This method offers a simple, rapid, and stable approach for analyzing ciprofloxacin in environmental samples.
Area of Science:
- Electrochemistry
- Analytical Chemistry
- Materials Science
Background:
- Ciprofloxacin is a widely used antibiotic.
- Accurate detection of ciprofloxacin is crucial for environmental monitoring.
- Existing detection methods can be complex or lack sensitivity.
Purpose of the Study:
- To develop a simple and rapid electrochemical method for ciprofloxacin determination.
- To enhance sensor performance using a modified glassy carbon electrode.
- To evaluate the sensor's applicability in real environmental samples.
Main Methods:
- Fabrication of a glassy carbon electrode modified with multi-walled carbon nanotubes (MWCNT) and β-cyclodextrin (β-CD) within a polyaniline film.
- Electrochemical characterization and performance evaluation of the modified electrode for ciprofloxacin oxidation.
- Molecular modeling to understand the interaction between ciprofloxacin and the sensor components.
- Analysis of ciprofloxacin in wastewater treatment plant effluent.
Main Results:
- The β-CD/MWCNT modified electrode demonstrated efficient electrocatalytic activity towards ciprofloxacin.
- The sensor exhibited high sensitivity, stability, and an extended lifetime.
- Molecular modeling confirmed preferential binding of ciprofloxacin to β-CD, enhancing sensor sensitivity.
- A linear calibration curve was achieved for ciprofloxacin concentrations from 10-80 µM, with a detection limit of 50 nM.
- Successful application of the sensor for ciprofloxacin detection in wastewater effluent.
Conclusions:
- The developed electrochemical sensor offers a sensitive, stable, and efficient method for ciprofloxacin detection.
- The synergistic effect of MWCNT and β-CD significantly improves sensor performance.
- This methodology holds promise for environmental monitoring of ciprofloxacin contamination.
