Dmitry Solenov, Kirill A. Velizhanin
Chemical functionalization of graphene holds promise for various applications
ranging from nano-electronics to catalysis, drug delivery, and nano-assembly.
In many applications it is important to be able to transport adsorbates on
graphene in real time. We propose to use electromigration to drive the
adsorbate transport across the graphene sheet. To assess the efficiency of
electromigration, we develop a tight-binding model of electromigration of an
adsorbate on graphene and obtain simple analytical expressions for different
contributions to the electromigration force. Using experimentally accessible
parameters of realistic graphene-based devices as well as electronic structure
theory calculations to parameterize the developed model, we argue that
electromigration on graphene can be efficient. Specifically, we show that the
drift velocity of atomic oxygen covalently bound to graphene can reach up to ~2
cm/s.
View original:
http://arxiv.org/abs/1201.6642
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