Regensburg 2019 – wissenschaftliches Programm
O 66.12: Poster
Mittwoch, 3. April 2019, 17:45–20:00, Poster B2
The surface of high-temperature non-IPR fullerides — Jürgen Weippert1, Seyithan Ulas1, Eugen Wald1, Bastian Kern1, Dmitry Strelnikov1, Mateo Amatti2, Luca Gregoratti2, Maya Kiskinova2, and •Artur Böttcher2 — 1Institute of Physical Chemistry, Karlsruhe Institute of Technology (KIT), Fritz-Haber-Weg 2, 76131 Karlsruhe, Germany — 2Elettra, Sincrotrone Trieste, ScPA Area Science Park, 34149 Basovizza-Trieste, Italy
Alkali metal doped non-IPR fullerene materials Cn, (n = 60−2k and n = 70−2k, k=1,..5) represent a new class of fullerides. We created CsxC58 and CsxC68 materials making use of the low energy cluster beam deposition (LECBD ). The non-IPR fullerene cages C58 and C68 form a covalently stabilized scaffold which gets doped by Cs atoms already during the growth. By heating the resulting material up to 1100K monodispersed high-temperature carbon solids, HT-CsxCn, can be created. The resulting materials exhibit high stability and considerably depleted Cs contents. The carbon scaffolds are stabilized by multifold covalent intercage bonds. The surface morphology is driven by on-top segregation in the two-component system. In both HT materials the surface topography is dominated by islands standing out by their elevated Cs/Cn ratio r. Whereas the islands seen in CsxC58 exhibit r values not larger than 2 the bright surface areas in the CsxC68 solids surprise with extremely high r values (up to 70 Cs atoms per cage).  S. Ulas, et al. Phys. Status Solidi B 2018, 1800453 (1-13). S. Ulas, et al. Carbon 2014, 68, 125-137. S. Ulas, et al. J. Chem. Phys. 2012, 136, 114708.