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Charge-Transport Behavior in Shape-Controlled Poly(3,4-ethylenedioxythiophene) Nanomaterials : Intrinsic and Extrinsic Behaviors

Cited 59 time in Web of Science Cited 57 time in Scopus
Authors
Yoon, Hyeonseok; Hong, Jin-Yong; Jang, Jyongsik
Issue Date
2007
Publisher
Wiley Blackwell
Citation
Small 2007, 3, 1774-1783
Keywords
charge-transport propertiesconducting polymersnanomaterialssensors
Abstract
The charge-transport behavior in one-dimensional (1D) poly
(3,4-ethylenedioxythiophene) (PEDOT) nanomaterials of three different
shapes is described. Both intrinsic and extrinsic factors are considered
from the viewpoint of a single nanoparticle and nanoparticle assembly.
Intrinsically, the oxidation level of the 1D PEDOT nanomaterials
becomes higher with increasing aspect ratio of the nanomaterials, which
is closely linked to the conjugation length. This result implies that the
transport properties of the nanomaterials are significantly dependent on
their shape. Extrinsically, the 1D PEDOT nanomaterials make an ohmic
contact with gold interdigitated microelectrodes. In addition, a strong correlation
is observed between the interparticle contact resistance and the
shape of the nanomaterials. Lastly, the intrinsic and extrinsic factors
related to charge transport are further illustrated by the resistance
changes of nanomaterial-based chemical sensors. As a result, judicious
tailoring of the dimensional and geometrical characteristics of the conducting-
polymer nanomaterials may enable precise control over their
transport properties as well as the characteristics of the nanomaterialbased
devices.
ISSN
1613-6810
Language
English
URI
http://hdl.handle.net/10371/61364
DOI
https://doi.org/10.1002/smll.200700245
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Chemical and Biological Engineering (화학생물공학부)Journal Papers (저널논문_화학생물공학부)
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