Improved graphitization and electrical conductivity of suspended carbon nanofibers derived from carbon nanotube/polyacrylonitrile composites by directed electrospinning

Title
Improved graphitization and electrical conductivity of suspended carbon nanofibers derived from carbon nanotube/polyacrylonitrile composites by directed electrospinning
Author(s)
아슈샬마Yoon-Kyoung Cho[Yoon-Kyoung Cho]Marc Madou[Marc Madou]Alok Srivastava[Alok Srivastava]Swati Sharma[Swati Sharma]Tanmoy Maitra[Tanmoy Maitra]
Keywords
HIGH-SURFACE-AREA; CATALYTIC GRAPHITIZATION; MECHANICAL-PROPERTIES; POLY(VINYL ALCOHOL); POLYMER COMPOSITES; FIBERS; NANOTUBES; FILMS; POLYACRYLONITRILE; MICROBATTERIES
Issue Date
201204
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
CARBON, v.50, no.5, pp.1753 - 1761
Abstract
Single suspended carbon nanofibers on carbon micro-structures were fabricated by directed electrospinning and subsequent pyrolysis at 900 degrees C of carbon nanotube/polyacrylonitrile (CNT/PAN) composite material. The electrical conductivity of the nanofibers was measured at different weight fractions of CNTs. It was found that the conductivity increased almost two orders of magnitude upon adding 0.5 wt.% CNTs. The correlation between the extent of graphitization and electrical properties of the composite nanofiber was examined by various structural characterization techniques, and the presence of graphitic regions in pyrolyzed CNT/PAN nanofibers was observed that were not present in pure PAN-derived carbon. The influence of fabrication technique on the ordering of carbon sheets in electrospun nanofibers was examined and a templating effect by CNTs that leads to enhanced graphitization is suggested. (C) 2011 Elsevier Ltd. All rights reserved.
URI
http://hdl.handle.net/YU.REPOSITORY/28721http://dx.doi.org/10.1016/j.carbon.2011.12.021
ISSN
0008-6223
Appears in Collections:
공과대학 > 기계공학부 > Articles
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE