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Updated: Jun 22, 2026

A Polyaniline-based Sensor of Nucleic Acids

A Polyaniline-based Sensor of Nucleic Acids

Published on: November 1, 2016

Conducting carbonized polyaniline nanotubes.

Slavko Mentus¹, Gordana Cirić-Marjanović, Miroslava Trchová

¹Faculty of Physical Chemistry, University of Belgrade, Studentski trg 12-16, 11158 Belgrade, Serbia.

|May 28, 2009

Summary

Nitrogen-containing carbon nanotubes were synthesized from polyaniline nanotubes. Carbonization significantly enhanced electrical conductivity, yielding a material with potential applications in conductive materials.

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Area of Science:

Materials Science
Nanotechnology
Chemistry

Background:

Polyaniline (PANI) nanotubes are known for their electrical properties.
Developing novel carbon-based nanomaterials with enhanced conductivity is crucial for advanced applications.

Purpose of the Study:

To synthesize nitrogen-containing carbon nanotubes from polyaniline nanotubes.
To characterize the structural, electrical, and paramagnetic properties of the synthesized materials.

Main Methods:

Self-assembly of polyaniline nanotubes protonated with sulfuric acid.
Carbonization in a nitrogen atmosphere at 800°C.
Characterization using scanning/transmission electron microscopy, elemental analysis, FTIR, Raman, and EPR spectroscopy.

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Main Results:

Successfully synthesized nitrogen-containing carbon nanotubes with varying diameters (8-260 nm).
Achieved a nitrogen content of 9 wt% in the carbonized product.
Enhanced electrical conductivity from 0.04 S cm⁻¹ in PANI precursor to 0.7 S cm⁻¹ in carbonized nanotubes.

Conclusions:

Carbonization of polyaniline nanotubes is an effective method for producing nitrogen-containing carbon nanotubes.
The synthesized materials exhibit significantly improved electrical conductivity and distinct structural and paramagnetic properties compared to the precursor.