Abstract
Simple and inexpensive single step facile novel chemical route for the preparation of polyaniline (PANi) nanofibers has been reported. These PANi nanofibers are characterized with X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, Field emission scanning electron microscopy (FESEM) and Transmission electron microscopy (TEM). Polyaniline nanofibers exhibit amorphous nature as confirmed from XRD and SAED study. Based on FESEM and TEM analysis, the formation of the polyaniline nanofibers with average diameter of about 40 nm was inferred. The presence of characteristic bonds of polyaniline was observed from FTIR spectroscopy technique. Electrical and optical properties revealed that p-type conductivity PANi with room temperature conductivity of 2.77 × 10−5 (Ω cm)−1 has band gap of 3.40 eV. A blue shift of 0.86 eV with characteristic absorption peak at 441 nm has been attributed due to quantized size of polyaniline nanofibers.
Highlights
Nanostructured materials today have immense importance in the field of optoelectronics and biomedical
Simple and inexpensive single step facile novel chemical route for the preparation of polyaniline (PANi) nanofibers has been reported. These PANi nanofibers are characterized with X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, Field emission scanning electron microscopy (FESEM) and Transmission electron microscopy (TEM)
The possible reaction mechanism for in situ chemical polymerization of polyaniline is given as follows: For preparation of semiconducting polyaniline by novel in situ chemical polymerization, reaction mixture contains the solution of 0.2 M aniline prepared in 1 M hydrochloric acid which serves as a cationic precursor at room temperature with pH & 1
Summary
Nanostructured materials today have immense importance in the field of optoelectronics and biomedical. These can be avoided by facile and novel in situ chemical route which results into entailed thin film form of the deposit at room temperature. Khuspe et al reported microstructural and optical properties of nanostructured polyaniline in semiconducting form PANi (EB) by chemical oxidation polymerization method for ammonia gas sensing applications (Khuspe et al 2012).
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