A Scanning Tunneling Microscopy Investigation of 4,4' Dimethyl Bianthrone Molecules Adsorbed on Cu(111)

Well-ordered monolayers of 4,4' dimethyl bianthrone molecules have been grown on a Cu(111) surface in ultra-high vacuum. Scanning tunneling microscopy images show the formation of three rotational domains with a molecular arrangement nearly devoid of structural defects. For coverages below a densely packed monolayer, ordered molecular islands form on terrace sites away from substrate step edges. Time-lapsed sequences of scanning tunneling microscopy images reveal the coexistence of molecules in a mobile Well-ordered monolayers of 4,4' dimethyl bianthrone molecules have been grown on a Cu(111) surface in ultra-high vacuum. Scanning tunneling microscopy images show the formation of three rotational domains with a molecular arrangement nearly devoid of structural defects. For coverages below a densely packed monolayer, ordered molecular islands form on terrace sites away from substrate step edges. Time-lapsed sequences of scanning tunneling microscopy images reveal the coexistence of molecules in a mobile state together with a fixed two-dimensional molecular crystal phase. state together with a fixed two-dimensional molecular crystal phase.

By: M. T. Cuberes, R. R. Schlittler, T. A. Jung, K. Schaumburg (Univ. of Copenhagen, Denmark) and J. K. Gimzewski

Published in: Surface Science, volume 383, (no ), pages 37-49 in 1997

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