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Related Experiment Video

Updated: Jan 26, 2026

A Polyaniline-based Sensor of Nucleic Acids

A Polyaniline-based Sensor of Nucleic Acids

Published on: November 1, 2016

High Response CO Sensor Based on a Polyaniline/SnO₂ Nanocomposite.

Kai-Syuan Jian¹, Chi-Jung Chang², Jerry J Wu³

¹Department of Materials Science and Engineering, Feng Chia University, Taichung 407, Taiwan. seed111713@gmail.com.

|April 10, 2019

Summary

A novel polyaniline (PANI)/tin oxide (SnO₂) composite film enhances carbon monoxide (CO) detection. This PANI/SnO₂ sensor shows excellent performance at low temperatures (<75 °C).

Keywords:

CO gas sensor low operating temperature polyaniline sol-gel tin oxide

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Area of Science:

Materials Science
Nanotechnology
Chemical Sensing

Background:

Carbon monoxide (CO) is a toxic gas requiring sensitive detection methods.
Developing efficient gas sensors for low-temperature operation remains a challenge.

Purpose of the Study:

To fabricate and characterize a polyaniline (PANI)/tin oxide (SnO₂) composite for CO sensing.
To evaluate the sensor's performance at low operating temperatures.

Main Methods:

Tin oxide (SnO₂) nanoparticles were synthesized using the sol-gel method.
A composite film of SnO₂ nanoparticles and PANI was fabricated.
Sensor response to CO concentration was measured at temperatures below 75 °C.

Main Results:

The SnO₂ nanoparticles offered a high surface area, improving CO detection.
The PANI component facilitated redox reactions, creating a significant resistance change.
The composite demonstrated excellent sensor response at low operating temperatures (<75 °C).

Conclusions:

Combining n-type SnO₂ nanoparticles with conductive PANI is effective for high-performance CO gas sensors.
The PANI/SnO₂ composite shows promise for sensitive CO detection at low temperatures.