AVS 66th International Symposium & Exhibition
    Nanometer-scale Science and Technology Division Wednesday Sessions
       Session NS+2D+AS-WeA

Paper NS+2D+AS-WeA8
Carbon-based Two-dimensional Materials from Surface-catalyzed Reactions of Small Molecules

Wednesday, October 23, 2019, 4:40 pm, Room A222

Session: Probing and Modifying Surface and Interfacial Chemistry at the Nanoscale
Presenter: Rebecca Quardokus, University of Connecticut
Authors: M. Wolf, University of Connecticut
C.R. Gerber, University of Connecticut
R.C. Quardokus, University of Connecticut
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Aryl halides undergo an Ullmann-like coupling reaction on surfaces to yield a carbon-based two-dimensional material. 1,2-dibromobenzene couples to Au(111) lifting the gold herringbone reconstruction. The reaction intermediates and coupled gold atoms are mobile on the surface at 4 K. The FCC and HCP sections of the underlying gold substrate shift to new positions. Annealing the dibromobenzene on Au(111) decouples the intermediates from the gold. The gold herringbone reconstruction returns and a covalently-bonded carbon-based network forms on the Au(111) surface.