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Nanochannels Photoelectrochemical Biosensor.

Nan Zhang¹, Yi-Fan Ruan¹, Li-Bin Zhang¹

¹State Key Laboratory of Analytical Chemistry for Life Science and Collaborative Innovation Center of Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University , Nanjing 210023, China.

Analytical Chemistry

|December 29, 2017

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This study introduces a novel nanochannel photoelectrochemical (PEC) biosensor. The device utilizes a unique copper oxide photocathode and an AAO membrane for sensitive detection of alkaline phosphatase (ALP) activity.

Area of Science:

Nanotechnology
Biosensors
Electrochemistry
Materials Science

Background:

Nanochannels offer promising platforms for advanced biosensor development.
Photoelectrochemical (PEC) biosensors integrate light and electrochemical detection for enhanced sensitivity.
Alkaline phosphatase (ALP) is a key biomarker in various physiological and pathological processes.

Purpose of the Study:

To present a novel nanochannel photoelectrochemical (PEC) biosensor.
To demonstrate the detection of alkaline phosphatase (ALP) activity using this new biosensor.
To explore the potential of nanochannel-semiconductor heterostructures in biomedical applications.

Main Methods:

Fabrication of a Cu_xO-nanopyramid-islands (NPIs) photocathode.

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Integration of the photocathode with an anodic aluminum oxide (AAO) membrane to create nanoarrays.

Stimulation of biocatalytic precipitation (BCP) within the nanochannels for ALP detection.

Main Results:

The developed Cu_xO-NPIs photocathode exhibited good performance.
The integrated nanochannel-semiconductor heterostructure enabled successful detection of ALP activity.
The biosensor demonstrated effective signal generation upon ALP-catalyzed reactions.

Conclusions:

A novel nanochannel PEC biosensor paradigm has been established.
This biosensor provides a versatile platform for general bioanalytical purposes.
The findings highlight the potential of nanochannel-semiconductor heterostructures for innovative biomedical applications.