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Posted: Oct 18, 2011
Graphene versus carbon nanotubes in electronic devices
(Nanowerk News) Advances in semiconductor device during last few decades enable us to
improve the electronic device performance by minimizing the device dimension.
However, further development of these systems encounters scientific
and technological limits and forces us to explore better alternatives. Low-dimensional
carbon allotropes such as carbon nanotube and graphene exhibit
superior electronic, optoelectronic, and mechanical properties compared to
the conventional semiconductors.
The purpose of this article is to compare the characteristics
of both graphene and carbon nanotubes in electronics, i.e.,
transparent conducting films and thin-film transistors,
and furthermore to provide intuition for future nanocarbon
A particular focus is
the comparison of the characteristics in transparent conducting films (transparency
and sheet resistance) and field-effect transistors (FETs) (device types,
ambipolarity, mobility, doping strategy, FET-performance, logic and memory
operations). Finally, the performance of devices that combine graphene and
carbon nanotubes is also highlighted.