List of records in nano database
||Wave packet dynamical simulation of
scanning tunneling spectroscopy of
||Cluster and Nanostructure Interfaces
||Carbon nanotubes (CNT) are nanometric objects
built from only C atoms.
Their electronic properties are determined
by the way in which the graphene sheet is
rolled into a cylinder.
In its spectroscopic mode, STM is a unique
tool for the investigation of electronic
properties of a CNT.
On the other hand, the interpretation of
experimental data is made difficult by the
complexity of the tunneling system as compared
with bulk single crystalline surfaces.
Several groups reported asymmetric I-V curves
for CNTs supported on different surfaces.
We use wave packet dynamics to investigate
possible causes of this phenomenon for the
case of an isolated CNT and for ropes of
The effects of tip geometry and tip polarity
are investigated, and the consequences of
point contact imaging are studied.
The results obtained from simulation are
compared with experimental data.
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