Regensburg 2010 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 23: Nanostructures at surfaces: Dots, particles, clusters
O 23.10: Vortrag
Dienstag, 23. März 2010, 12:45–13:00, H33
Electrospray Ion Beam Deposition: A New Approach to Investigate the Mn12-Acetate Molecular Magnets on Metal Surfaces by Scanning Tunneling Microscopy — •Zhitao Deng1, Christian Michaelis1, Alicia Forment-Aliaga1,2, Nicha Thontasen1, Steffen Kahle1, Nicola Malinowski1, Markus Ternes1, Stephan Rauschenbach1, and Klaus Kern1,3 — 1MPI-FKF, Stuttgart, Germany — 2Instituto de Ciencia Molecular, Universitat de València, Paterna, Spain — 3Institut de la Matière Condenseé, EPFL, Lausanne, Switzerland
A well defined sample preparation is crucial in order to achieve the ultimate goal of probing the single spin properties of a single molecular magnet. Films of monolayer and submonolayer coverage of the single molecule magnet Mn12-acetate ([Mn12O12(CH3COO)16(H2O)4]·2CH3COOH·4H2O) were prepared in-situ on Au(111) surface in ultra high vacuum using electrospray ion beam deposition (ES-IBD). The samples were characterized by several surface sensitive techniques including matrix assisted laser desorption ionization mass spectrometry (MALDI-MS) and scanning tunneling microscopy (STM). The Mn12-acetate molecules were deposited by a electrospray ionization source[1] in negative mode. STM measurements at a temperature of 40K show that the molecules are trapped at the elbow sites of the reconstructed Au(111) surface at the initial stage. With increasing molecular coverage, molecules aggregate in the fcc region of the Au(111) surface at first and in the hcp region for even higher coverage. [1] Small 2 (2006), 540-547