Related Experiment Video
Updated: May 24, 2026
12:20
Fabrication of Carbon Nanotube High-Frequency Nanoelectronic Biosensor for Sensing in High Ionic Strength Solutions
Published on: July 22, 2013
Copper ion sensing with fluorescent electrospun nanofibers
Merve Zeyrek Ongun1, Kadriye Ertekin, Mustafa Gocmenturk
1University of Dokuz Eylul, The Graduate School of Natural and Applied Sciences, Department of Chemistry, Izmir, Turkey. merve.zeyrek@deu.edu.tr
Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
|February 21, 2012
Summary
Electrospun nanofibrous materials offer highly sensitive fluorescence quenching-based detection of copper (Cu(II)) ions. These novel copper sensors demonstrate rapid response times and excellent stability, outperforming traditional thin films.
Area of Science:
- Materials Science
- Analytical Chemistry
- Nanotechnology
Background:
- Developing sensitive and rapid chemosensors for metal ion detection is crucial for environmental monitoring and diagnostics.
- Fluorescence quenching-based sensors offer high sensitivity but often require improved material platforms for enhanced performance.
- Electrospun nanofibrous materials provide a unique matrix with high surface area for sensor development.
Purpose of the Study:
- To report the development of electrospun nanofibrous materials as a highly responsive chemosensor for copper (Cu(II)) ions.
- To investigate the sensitivity, response time, and stability of these novel copper sensors.
- To compare the performance of nanofibrous sensors with continuous thin films.
Main Methods:
- Fabrication of sensing slides using electrospinning of poly(methyl methacrylate) and ethyl cellulose.
- Utilizing a fluoroionophore, N'-3-(4-(dimethylamino phenly)allylidene)isonicotinohydrazide, for fluorescence quenching detection of Cu(II) ions.
- Performing Stern-Volmer analysis to quantify sensor sensitivity and evaluating response times and long-term stability.
Main Results:
- Electrospun nanofibrous membranes exhibited significantly higher sensitivity (6-20-fold) for Cu(II) detection compared to continuous thin films.
- Linear calibration plots were achieved for Cu(II) ions in the concentration range of 10(-12) to 10(-5) M.
- The sensing slides demonstrated response times under 1 minute and excellent ionophore stability with no significant signal drift after 6 months of ambient storage.
Conclusions:
- Electrospun nanofibrous materials are effective platforms for developing highly sensitive and rapid fluorescence quenching-based copper chemosensors.
- The high surface area of nanofibrous membranes enhances sensor performance, enabling detection of low Cu(II) concentrations.
- These stable and fast-responding sensors show great potential for practical applications in copper ion monitoring.
