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Chemiluminescence-based Assays for Detection of Nitric Oxide and its Derivatives from Autoxidation and Nitrosated Compounds

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Detection of CO2 in solution with a Pt-NiO solid-state sensor.

Zhao Yue¹, Wencheng Niu, Wei Zhang

¹College of Information Science and Technology, Nankai University, 300071 Tianjin, China. lunarey@gmail.com

Journal of Colloid and Interface Science

|May 18, 2010

Summary

A novel all-solid-state sensor using a metal insulator semiconductor field effect transistor (MISFET) detects dissolved carbon dioxide (CO2). The sensor, featuring a Pt-NiO thin film, exhibits a linear response to CO2 concentration at room temperature.

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Area of Science:

Electrochemistry
Materials Science
Chemical Sensing

Background:

Dissolved carbon dioxide (CO2) detection is crucial in various environmental and industrial applications.
Existing methods for dissolved CO2 sensing often lack all-solid-state configurations or require complex calibration.
Development of robust and sensitive sensors for dissolved CO2 is an ongoing area of research.

Purpose of the Study:

To present a novel metal insulator semiconductor field effect transistor (MISFET)-type sensor for detecting dissolved CO2 in aqueous solutions.
To describe the fabrication process and characterize the performance of this all-solid-state sensor.
To evaluate the sensor's response to varying concentrations of dissolved CO2.

Main Methods:

Fabrication of an all-solid-state MISFET sensor utilizing a platinum-nickel oxide (Pt-NiO) thin film as the active sensing layer on a gate electrode.
Characterization of the sensor's performance, including transient characteristics and response curves.
Measurement of sensor response (V(RS)) against the concentration of dissolved CO2 at different biases and room temperature.

Main Results:

The developed MISFET sensor successfully detects CO2 dissolved in aqueous solutions.
The sensor demonstrates a linear relationship between its response and the logarithm of the dissolved CO2 concentration.
The device operates effectively at room temperature, indicating practical applicability.

Conclusions:

The Pt-NiO thin film-based MISFET sensor offers a promising all-solid-state solution for dissolved CO2 detection.
The sensor's linear response to the logarithm of CO2 concentration simplifies quantification and calibration.
This technology has potential applications in environmental monitoring and industrial process control requiring dissolved CO2 measurement.