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Calcein-modified multinanochannels on PET films for calcium-responsive nanogating
Zheyi Meng1, Chendi Jiang, Xiulin Li
1Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry and Environment, Beihang University , Beijing 100191, P. R. China.
ACS Applied Materials & Interfaces
|March 15, 2014
Summary
Multiporous films with conical channels enhanced calcium ion detection in nanofluid devices. Calcein modification improved ion current stability and intensity, offering better calcium sensing capabilities.
Area of Science:
- Materials Science
- Nanotechnology
- Electrochemistry
Background:
- Nanofluidic devices are crucial for sensitive ion detection.
- Calcium ion (Ca2+) sensing requires stable and intense ionic current signals.
- Calcein is a fluorescent molecule with potential for ion binding applications.
Purpose of the Study:
- To develop multiporous films for enhanced calcium-responsive ionic currents.
- To investigate the role of calcein modification in improving signal intensity and stability.
- To explore the regulation of calcium ion binding by calcein's carboxyl groups.
Main Methods:
- Fabrication of multiporous films with conical channels.
- Modification of films with calcein.
- Integration of modified films into a nanofluidic device.
- Measurement of ionic currents and calcium ion response.
Main Results:
- Calcein-modified films demonstrated enhanced calcium-responsive intensity.
- The stability of ionic currents was significantly improved.
- The number of carboxyl groups in calcein influenced calcium ion response.
- Deprotonation of carboxyls regulated the Ca(2+)-binding capability of immobilized calcein.
Conclusions:
- Calcein-modified multiporous films offer a promising approach for sensitive calcium ion detection.
- The design enhances the performance of nanofluidic devices for ion sensing.
- Tuning calcein's chemical properties allows for controlled calcium ion binding and signal modulation.
