Berlin 2015 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 83: Surface Chemistry and Growth
O 83.12: Vortrag
Donnerstag, 19. März 2015, 13:15–13:30, MA 144
nc-AFM study of C60 islands on organic compound crystals — •Sara Freund1, Antoine Hinaut1, Rémy Pawlak1, Shi-Xia Liu2, Silvio Decurtins2, Ernst Meyer1, and Thilo Glatzel1 — 1Department of Physics, University of Basel, Switzerland — 2Department of Chemistry and Biochemistry, University of Bern, Switzerland
Organic layered compound crystals have rarely been investigated by the means of room temperature noncontact atomic force microscopy (nc-AFM). This kind of material offers the possibility to design surfaces with different chemical compounds and molecular orientations [ 1]. The study of adsorbed molecules on such surfaces under ultra-high vacuum (UHV) conditions might be of great interest in the field of optoelectronics.
In this study the behaviour of fullerene (C60) molecules on the salt bis(benzylammonium)bis(oxalate)cupurate(II) (BNL) was investigated. BNL is a transition-metal oxalate complex which exhibits layer-type crystal structures [ 2]. The C60 molecules were deposited on the substrate by thermal deposition and formed small islands. High resolution images of the substrate and the C60 islands were obtained. Manipulations of the molecular islands have been induced by controlled tip interactions. It was observed that they can be split up and redistributed by these interactions to form larger islands. Tip-induced shape modifications of these C60 islands was also observed and analysed.
[ 1] G. Fessler et al., Appl. Phys. Lett., 98(8), 083119, 2011.
[ 2] S. Decurtins et al., Mol. Cryst. Liq. Sci. Technol., Sec A 305, 227, 1997.