Development of a long-term stable organic membrane-based thin-film microsensor using new-type substrate surface...

Area of Science:

• Electrochemistry
• Materials Science
• Analytical Chemistry

Background:

• Development of ion-selective electrodes (ISEs) is crucial for chemical sensing.
• Organic membrane-based sensors often face limitations in stability and lifetime.
• Miniaturization of electrochemical sensors is a key trend in analytical devices.

Purpose of the Study:

• To develop a novel, long-lifetime organic membrane-based thin-film microsensor for Cu(II) ions.
• To improve the stability and operational lifetime of thin-film microsensors.
• To evaluate the electrochemical performance and reliability of the developed microsensor.

Main Methods:

• Fabrication of a thin-film Cu(II) microsensor using electrodeposition and nebulization techniques.
• Evaluation of electrochemical properties including ionic sensitivity, limit of detection, pH effects, response time, and selectivity.
• Comparison of performance with conventional ion-selective and coated graphite rod macroelectrodes.

Main Results:

• Achieved a significantly improved sensor lifetime exceeding 4 months.
• Demonstrated excellent stability, reasonable selectivity, and good ionic sensitivity.
• Established Nernstian response over a defined interval and evaluated dynamic response time.
• Compared favorably to conventional macroelectrode sensors.

Conclusions:

• The novel organic membrane-based thin-film Cu(II) microsensor exhibits enhanced lifetime and stability.
• The developed fabrication methods are effective for creating reliable and miniaturized electrochemical sensors.
• The microsensor shows promise for practical, low-cost miniaturized analytical applications.