Electrical Conductivity of an Individual Polyaniline Nanotube Synthesized by a Self‐Assembly Method

Abstract

Camphor sulfonic acid (CSA) doped polyaniline (PANI) nanotubes (175 nm in outer diameter and 120 nm in inner diameter) were synthesized successfully by a self‐assembly method. It is found that the room‐temperature conductivity of an individual PANI nanotube is 30.5 S · cm−1; in particular, the intrinsic resistance of an individual nanotube (30 kΩ) is much smaller than the contact resistance of crossed nanotubes (500 kΩ).A SEM image of two crossed PANI‐CSA nanotubes and the attached Pt electrodes.magnified imageA SEM image of two crossed PANI‐CSA nanotubes and the attached Pt electrodes.

Polymer Nanofibers and Nanotubes: Charge Transport and Device Applications

“…[40] The σ(T) of a single PANi-CSA nanotube (175 nm in outer diameter) synthesized by a template-free self-assembled method was studied by a standard four-terminal technique. [20,41] The conductivity of the single PANi nanotube is found to be rather high, σ 300K ~ 31.4 S/cm. The intrinsic resistance of an individual nanotube (30 k ) was found to be much smaller than the contact resistance of crossed nanotubes (500 k ) and that of PANi nanotubes obtained by the template method.…”

“…[35] Charge transport in low-dimensional structures such as polymer nanofibers and nanotubes is less studied than for in 3D conducting polymer films. Experimental data is available on the electrical properties of PA, [26][27][28] PPy, [17] PEDOT, [18] PANI, [16,20,23] and some other polymer fibers and tubes. The results for different fibers are not uniform and there is no generally accepted model for a dominant transport mechanism in such systems.…”

“…The intrinsic resistance of an individual nanotube (30 k ) was found to be much smaller than the contact resistance of crossed nanotubes (500 k ) and that of PANi nanotubes obtained by the template method. [20] As can be seen from . [36] This result means that the presumed low-dimensional PANi-CSA tubes behave as 3D…”

A Review on Electronic Transport Properties of Individual Conducting Polymer Nanotubes and Nanowires

“…It was found that the inter-tubular junction resistance of two crossed polyaniline nanotubes (Fig. 10) is very large, about 500 kΩ at room temperature, which is nearly 16 times larger than the intra-tube (intrinsic) resistance of an individual PANI nanotube (about 30 kΩ, Long et al, 2003c). This result explains straightforwardly why an individual polyaniline nanotube has a much higher roomwww.intechopen.com A Review on Electronic Transport Properties of Individual Conducting Polymer Nanotubes and Nanowires 235 temperature conductivity (30.5 S/cm) than that of a pellet of polyaniline nanotubes where the measured resistance is dominated by the inter-fibril resistance (0.03 S/cm).…”

“…In this section, we discuss two kinds of nanocontact resistance: between two crossed polymer nanowires/tubes and between polymer nanowire/tube and metal microlead. (Long et al, 2003c) The nanocontact resistance between two crossed polymer nanotubes/wires has been studied by Long et al (Long et al, 2003c& 2009a. It was found that the inter-tubular junction resistance of two crossed polyaniline nanotubes (Fig.…”