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Andrei N. Khlobystov: "Carbon Nano-Containers and Nano-Reactors"

Wann 29.03.2012
von 13:15 bis 14:00
Wo FRIAS Seminar Room, Albertstr. 19, 79104 Freiburg
Kontakttelefon +49-(0)761-203-6020
Teilnehmer Open to University employees
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Dr. Andrei N. Khlobystov
School of Chemistry, University of Nottingham, UK


"Carbon Nano-Containers and Nano-Reactors "

Carbon is capable of forming atomically thin, yet mechanically robust structures, such as graphene and single-walled nanotubes (SWNT). In our research, we utilise these nanostructures as containers/substrates for individual molecules and atoms. Because of the low atomic number of carbon (Z = 6), SWNT and graphene are particularly suitable for high resolution transmission electron microscopy (HRTEM) analysis as their contrast is sufficiently low to “see through” them and to visualise individual molecules with atomic resolution. Furthermore, SWNT and graphene are very efficient heat and electric conductors, while the chemical reactivity of graphene surface and the interior of carbon nanotubes is extremely low, which protect the structural and the chemical integrity of the molecules during HRTEM studies. Over the past few years we have researched fundamental rules governing packing, orientation, and van der Waals interactions of molecules in nanotubes using low voltage HRTEM methodology. Recently, we extended this methodology to aberration corrected HRTEM (AC-HRTEM). This approach has been fruitful for unravelling complex chemical transformations in real-time and direct-space, such as formation of complex structures in SWNT and graphene. This unveils a long-standing mystery of the fullerene formation mechanism.