Synthesis, characteristics, and field emission of doped and de-doped polypyrrole, polyaniline, poly(3,4-ethylenedioxythiophene) nanotubes and nanowires

• Published in: Synthetic metals Vol. 150; no. 3; pp. 279 - 284
• Main Authors: Kim, B.H., Park, D.H., Joo, J., Yu, S.G., Lee, S.H.
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 10-05-2005; Amsterdam Elsevier Science; New York, NY
• Subjects: Applied sciences; Conducting polymer; Exact sciences and technology; Field emission; Nanotube; Nanowire; Physicochemistry of polymers; Polymerization; Polymers and radiations; Transistor; Nanowire; Transistor; Field emission; Conducting polymer; Nanotube; Electrical properties; Voltage current curve; Use; Experimental study; Electrochemical polymerization; Conducting polymers; Thiophene derivative polymer; Template polymerization; Morphology; Preparation; Drain current; Doped polymer; Nanowires; Alumina; Pyrrole polymer; Aniline polymer
• ISSN: 0379-6779; 1879-3290
• DOI: 10.1016/j.synthmet.2005.02.012

Doped and de-doped nanotubes and nanowires of polypyrrole, polyaniline, and poly(3,4-ethylenedioxythiophene) were synthesized by the electrochemical polymerization method, using Al
2O
3 nanoporous templates. The electrical and optical properties of the nanotubes and nanowires were controlled through various synthetic conditions, such as doping level, dopant, and template-dissolving solvents. The diameters and wall thicknesses of the nanotubes were 100–200
nm and 10–30
nm, respectively. To determine the electrical and optical properties of the nano-systems,
I–
V characteristic curves with gate bias, dc conductivity, and UV–vis spectra were measured. We observed that the nano-systems were transformed from a conducting state to a semiconducting (or insulating) state through the process of de-doping using the template-dissolving solvents. Possible applications of these nanotubes and nanowires in the construction of nanotip emitters in field emission displays and polymer-based transistors are presented.