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Title: Nanojunctions in conducting polypyrrole single nanowire made by focused electron beam: Charge transport characteristics

Abstract

A focused electron (E)-beam with various doses was irradiated on the intended positions of conducting polypyrrole (PPy) single nanowire (NW) to fabricate nanojunctions. The current-voltage characteristics and their temperature dependence of the PPy single NW with nanojunctions were measured and analyzed. By increasing the E-beam dose and the number of nanojunctions, the current level of the single NW was dramatically decreased, and the conductance gap became more severe as the temperature decreased. The charge transport behavior varied from three-dimensional variable range hopping to fluctuation induced tunneling models, depending on the dose of focused E-beam. From micro-Raman spectra, the focused E-beam irradiation induced the de-doped states and conformational modification of polymer chains in the nanojunctions. The results suggest that the nanojunctions made by focused E-beam acted as a quasi-potential barrier for charge conduction in the conducting PPy single NW.

Authors:
; ; ; ;  [1]
  1. Department of Physics, Korea University, Seoul 136-713 (Korea, Republic of)
Publication Date:
OSTI Identifier:
22036667
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 110; Journal Issue: 2; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-8979
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE; CHARGE TRANSPORT; DOPED MATERIALS; ELECTRIC CONDUCTIVITY; ELECTRON BEAMS; ELECTRONS; FLUCTUATIONS; IRRADIATION; ORGANIC POLYMERS; PHYSICAL RADIATION EFFECTS; POLYMERS; PYRROLES; QUANTUM WIRES; RAMAN SPECTRA; TEMPERATURE DEPENDENCE; THREE-DIMENSIONAL CALCULATIONS; TUNNEL EFFECT

Citation Formats

Koo, Min Ho, Hong, Young Ki, Park, Dong Hyuk, Jo, Seong Gi, and Joo, Jinsoo. Nanojunctions in conducting polypyrrole single nanowire made by focused electron beam: Charge transport characteristics. United States: N. p., 2011. Web. doi:10.1063/1.3609068.
Koo, Min Ho, Hong, Young Ki, Park, Dong Hyuk, Jo, Seong Gi, & Joo, Jinsoo. Nanojunctions in conducting polypyrrole single nanowire made by focused electron beam: Charge transport characteristics. United States. doi:10.1063/1.3609068.
Koo, Min Ho, Hong, Young Ki, Park, Dong Hyuk, Jo, Seong Gi, and Joo, Jinsoo. Fri . "Nanojunctions in conducting polypyrrole single nanowire made by focused electron beam: Charge transport characteristics". United States. doi:10.1063/1.3609068.
@article{osti_22036667,
title = {Nanojunctions in conducting polypyrrole single nanowire made by focused electron beam: Charge transport characteristics},
author = {Koo, Min Ho and Hong, Young Ki and Park, Dong Hyuk and Jo, Seong Gi and Joo, Jinsoo},
abstractNote = {A focused electron (E)-beam with various doses was irradiated on the intended positions of conducting polypyrrole (PPy) single nanowire (NW) to fabricate nanojunctions. The current-voltage characteristics and their temperature dependence of the PPy single NW with nanojunctions were measured and analyzed. By increasing the E-beam dose and the number of nanojunctions, the current level of the single NW was dramatically decreased, and the conductance gap became more severe as the temperature decreased. The charge transport behavior varied from three-dimensional variable range hopping to fluctuation induced tunneling models, depending on the dose of focused E-beam. From micro-Raman spectra, the focused E-beam irradiation induced the de-doped states and conformational modification of polymer chains in the nanojunctions. The results suggest that the nanojunctions made by focused E-beam acted as a quasi-potential barrier for charge conduction in the conducting PPy single NW.},
doi = {10.1063/1.3609068},
journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 2,
volume = 110,
place = {United States},
year = {2011},
month = {7}
}