Electrical properties polyaniline conductivity

Among conductive plastics, polyaniline has attracted much interest because of its environmental stability and its tunable electrical properties. Composite materials consisting of polyaniline nanofibers... 

Recent applications of SPM techniques have revealed new details of the electrical properties of conducting polymers. In one example, STM images were taken of the granular structure of electrochemically prepared polyaniline films. Simultane-... 

The nitrogen-containing conductive polymers, polypolypyrrole (PPY) and polyaniline (PAN) in particular, have been of great interest because of their controllable electrical conductivity, environmental stability and interesting redox properties associated with the chain heteroatoms, More importantly, the century-old [57,58] aniline family of polymers has been found to exhibit solution [59,60] and counter-ion induced [61-63] processability. Furthermore, the electrical properties of the aniline polymers can be substantially improved through secondary doping [64]. The aniline polymers have the general formula [(-B-NH—B—NH—), (-B—N=Q=N-)i.,.]v, in which B and Q denote the... 

V. L. Reena, J. D. Sudha, and C. Pavithran, Role of amphiphilic dopants on the shape and properties of electrically conducting polyaniline-clay nanocomposite, J. Appl. Polym. Set, 113, 4066 076 (2009). 

C.-C. Wang, J.-F. Song, H.-M. Bao, Q.-D. Shen, and C.-Z. Yang, Enhancement of electrical properties of ferroelectric polymers by polyaniline nanofibers with controllable conductivities, Adv. Funct. Mater., 18, 1299-1306 (2008). 

Hydrogen bond formation as a result of the interaetion of polymer with solvent was found to contribute to changes in the electric properties of polyaniline.Hydrogen bonding causes changes in conformal structure of polymer chains. This increases the electrical conductivity of polyaniline. Water is especially effective in causing such changes but other hy-... 

Supercapacitors require electrode materials that have good electrical conductivity, good electrochemical properties, high chemical and environmental stabilities, etc. Various ECP/CNM nanocomposites such as polyaniline/carbon nanofiber [31,32,34], polyaniline/graphene [62,67-69], and polypyrrole/graphene [73,75] are widely used as electrode materials in supercapacitors. 

As discussed previously, many chemical threats have acid/base properties. Thus, polyaniline films, which have been demonstrated as sensor materials for acid ase compounds, are logical substrates for use in chemical detection systems. In addition, polyaniline films have the electrical properties of a conducting polymer, so that they can be used for transduction, as well as molecular recognition. However, due to sensitivity, time response, and weakness, these sensors have limitations. For these reasons, Virji and coauthors have worked to improve the polyaniline films and incorporate them into much more robust systems. 

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