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SYNTHESES, CHARACTERIZATION AND APPLICATIONS OF MICRO-/NANO-STRUCTURED CONDUCTING POLYMERS AND CARBON NANOTUBES

by Bajpai, Vardhan

Abstract (Summary)
The fabrication, characterization and manipulation of micro-and nano-systems have caused science and engineering to become interwoven closer together in a way that is unprecedented. Since the discovery of carbon nanotubes by Iijima in 1991 the quest for developing new micro- and nano-structures has been ever growing. On the other hand, discovery of inherently conducting polymer opened up many new possibilities for devices combining their unique optical, electrical and mechanical properties. The first part of my work deals in synthesis, characterization and application demonstrations for two microstructures of inherently conducting polymer (ICP), polypyrrole, namely, microcontainers and microhorns. These electrochemically-synthesized microstructures were characterized using various tools such as cyclic voltammetric technique, FT-IR, SEM and TEM. Apart from the region-specific growth of polypyrrole microcontainers it has been shown that they possess immense potential to be applied in the field of chemical/bio-sensing and controlled release. Polypyrrole microhorns have been demonstrated to form better chemical and biosensors. Nanostructures from conducting polymer will be better for such applications due to their higher surface energies and interactive area. Aligned helical carbon nanotubes were synthesized in large scale to function as a template for further synthesis of coaxial aligned helical carbon nanotube/polyaniline nanowires. Apart from that, polyaniline nanowires were also synthesized separately to compare the sensing properties of both nanostructures of polyaniline. These nanostructures were characterized using various tools such as cyclic voltammetric technique, FT-IR, Raman, XPS, SEM and TEM. Their application as electrochemical capacitors and chemical sensors were also demonstrated.
Bibliographical Information:

Advisor:

School:The University of Akron

School Location:USA - Ohio

Source Type:Master's Thesis

Keywords:carbon nanotube polypyrrole polyaniline nanowires microcontainers nanotechnology

ISBN:

Date of Publication:01/01/2005

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