(a) and (b) Representative HRTEM image of dispersed PANI nanofibers at two different magnifications. (c) HRTEM image of a nanofiber showing the periodic pattern of PANI chains at a distance of 0.35 nm. (d)Histogram of number fibers against fiber diameter.
XRD patterns of the doped PANI nanofibers.
Raman spectra of the PANI nanofibers at (a) low wavenumbers (100–1000 cm−1) and (b) high wavenumbers (1100–1700 cm−1).
Log-log plots of temperature dependence of normalized conductivity of doped PANI nanofibers in the absence and in the presence of 8 T magnetic field.
Log-log plots of W vs. T of PANI nanofibers in (a) zero and (b) 8 T magnetic field.
lnσ vs. T −3/7 plots of doped PANI nanofibers in (a) zero and (b) 8 T magnetic field.
MR of the PANI nanofiber samples at different temperatures.
MR% (at B = 8 T) vs. temperature plot for C1, C2, and C3.
Representative fitting of MR of the samples to Eq. (7) at 30 K and 300 K of (a) C1, (b) C2, and (c) C3.
B 0 vs. T plot for C1, C2, and C3.
Assignments of Raman bands shown in Figs. 3(a) and 3(b) .
Parameters calculated from the conductivity data in the insulating regime.
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