Iridium Oxide-reduced Graphene Oxide Nanohybrid Thin Film Modified Screen-printed Electrodes as Disposable Electrochemical Paper Microfluidic pH Sensors

作者： Jiang Yang1,2, Tae-Joon Kwak3, Xiaodong Zhang4, Robert McClain5, Woo-Jin Chang*3,6, Sundaram Gunasekaran*1 1Department of Biological Systems Engineering,University of Wisconsin-Madison, 2Environment, Energy and Natural Resources Center, Department of Environmental Science and Engineering,Fudan University, 3Department of Mechanical Engineering,University of Wisconsin-Milwaukee, 4Department of Physics, School of Science,Tianjin University, 5Department of Chemistry,University of Wisconsin-Madison, 6School of Freshwater Sciences,University of Wisconsin-Milwaukee

简介：

Overview

This study presents a novel method for the electrochemical synthesis of iridium oxide-reduced graphene oxide (IrO2-RGO) nanohybrid thin films. These films are utilized in a portable pH sensor integrated with a paper-fluidic platform, enabling accurate pH measurements in various environments.

Key Study Components

Area of Science

• Electrochemistry
• Nanotechnology
• Sensor Development

Background

• Traditional pH measurement methods often lack sensitivity for small variations.
• Portable sensors are needed for point-of-care applications.
• Iridium oxide and graphene oxide have unique properties suitable for sensor applications.
• Paper microfluidics can enhance the functionality of pH sensors.

Purpose of Study

• To develop a portable electrochemical sensor for pH measurements.
• To combine iridium oxide and reduced graphene oxide for improved sensor performance.
• To facilitate accurate pH measurements in field conditions.

Methods Used

• Electrochemical synthesis of IrO2-RGO nanohybrid thin films.
• Integration of the films with a patterned paper-fluidic platform.
• Testing the sensor's performance in measuring pH levels.
• Utilization of low sample volumes for efficient measurements.

Main Results

• The developed sensor provides quick and accurate pH measurements.
• It demonstrates the capability to detect small pH variations.
• The sensor is portable and disposable, suitable for field use.
• Combines features of traditional pH strips and solid-state meters.

Conclusions

• The IrO2-RGO nanohybrid thin films are effective for pH sensing.
• This method offers a new approach for point-of-care pH measurements.
• Future applications may include environmental monitoring and health diagnostics.

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