TUESDAY 11:00
PLAYGROUND OF NANOCARBONS FROM ZERO TO THREE DIMENSIONS
Prof. Paola Ayala
University of Vienna, Faculty of Physics
Head of the group Tailored Hybrid Structures
ABSTRACT
All-carbon nanoelectronics remains a dream but constant efforts have already shown positive steps in such direction. In this talk I will present an overview and a progress report of my group´s research related low-dimensional carbon materials. The practical difficulties to produce ultra-clean, nearly defect-free carbon nanostructures have constantly appeared as stumbling blocks to observe physical phenomena. This is not surprising because the electronic and optical properties are very sensitive to the chemical environments. Whether we are dealing with the inevitable interactions of nanotubes in a bundle, single dopants, encapsulated structures, suspending media or tailored defects, the energies of charge carriers and lattice vibrations are always modified. The use of photoemission spectroscopy and X-ray absorption spectroscopy as key tools to understand the properties of low dimensional carbon systems will be explained. This overview will provide an approach to how these techniques can be utilized to understand and analyze changes in the site-selective valence and conduction bands (in particular of single-walled carbon nanotubes and graphene). I will show our recent progress on establishing the prerequisites for studying the rich low-dimensional physics of functionalized SWCNTs as an example.