1D and 0D nanocrystals
Description / Outline
We investigate low-dimensional crystals, in particular
carbon nanotubes (1D) and
semiconductor nanoparticles
(0D). Carbon nanotubes (CNT) are 1D carbon nanostructures, which can be
viewed as graphene sheets rolled into a cylinder. Their properties
depend critically on the atomic arrangement: even with similar diameter,
CNT can be semiconducting or metallic, depending on the helical angle
[given by the chiral index (
n,m)]. Resonance Raman spectroscopy
is a very elegant method to identify the chiral index of CNT. Currently,
we are interested in the optical and electronic properties of
covalently and non-covalently functionalized carbon nanotubes, in
particular on the level of individual (
n,m)-identified CNT.
Semiconductor nanoparticles show strong dependence of their optical
transitions on overall size and shape, as well as on the interfaces in
core-shell structures. Here, current research questions address strain
and alloying in core-shell nanoparticles.
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