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A Polyaniline-based Sensor of Nucleic Acids

A Polyaniline-based Sensor of Nucleic Acids

Published on: November 1, 2016

Fast response microfiber-optic pH sensor based on a polyaniline sensing layer.

Dandan Sun, Shaomin Xu, Yongming Fu

|December 28, 2020

Summary

This summary is machine-generated.

This study presents a novel microfiber-optic sensor using a polyaniline layer for accurate pH detection. The sensor shows high sensitivity in both acidic and alkaline solutions, offering a flexible platform for pH measurement.

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A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response

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Published on: January 7, 2019

Area of Science:

Optoelectronics
Materials Science
Chemical Sensing

Background:

Polyaniline (PANI) is a conductive polymer with tunable optical properties.
Microfiber-optic interferometers offer high sensitivity for refractive index sensing.
Accurate pH monitoring is crucial in various scientific and industrial applications.

Purpose of the Study:

To develop and characterize a microfiber-optic interferential sensor for pH detection.
To investigate the sensing performance of a polyaniline (PANI) sensing layer.
To demonstrate the feasibility of interface polymerization for sensor fabrication.

Main Methods:

Fabrication of a microfiber-optic interferential sensor with a PANI sensing layer.
Utilizing the change in refractive index of PANI with pH.
Translating refractive index changes into wavelength shifts in the interferometric fringe.
Systematic investigation of sensing performance in acidic and alkaline solutions.

Main Results:

The PANI-based sensor demonstrated efficient pH detection.
Sensitivity achieved was -0.54 nm/pH in acidic solutions and 0.28 nm/pH in alkaline solutions.
The interface polymerization method proved feasible for PANI attachment to the fiber surface.

Conclusions:

The microfiber-optic interferential sensor with a PANI layer is a viable platform for pH measurement.
The sensor exhibits high sensitivity and mechanical flexibility.
This technology holds promise for miniaturized and robust pH monitoring systems.