Abstract
We report on the specific heat and magnetic susceptibility of polyaniline (PANI)nanotubes, which were self-assembled by a template-free method. It is interestingly foundthat an electronic specific heat is not observed from present data, and the lattice specificheat of PANI nanotubes can be interpreted in terms of the contributions from both thecrystalline and the amorphous phases. The magnetic susceptibility includes aPauli-like susceptibility and a Curie-type susceptibility. The results reveal aninhomogeneous disorder picture of PANI nanotubes (i.e., PANI nanotubes arecomposed of crystalline regions and amorphous regions). The crystallinity fractionDg obtained from the specific heat is about 15% for the measured PANI nanotubes,which indicates that most of the polymer chains in the nanotubes are disordered.
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