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Epitaxially Driven Assembly Of Crystalline Molecular Films On Ordered Substrates, Julie A. Last, Andrew C. Hillier, Daniel E. Hooks, Jeffrey B. Maxson, Michael D. Ward
Epitaxially Driven Assembly Of Crystalline Molecular Films On Ordered Substrates, Julie A. Last, Andrew C. Hillier, Daniel E. Hooks, Jeffrey B. Maxson, Michael D. Ward
Andrew C. Hillier
Crystalline, molecularly thick organic films mimicking layer motifs observed in bulk crystals of conducting (ET)2X charge-transfer salts (ET ) bis(ethylenedithiolo)tetrathiafulvalene, X ) I3, ReO4) form on highly oriented pyrolytic graphite (HOPG) electrodes upon electrochemical oxidation of ET in electrolytes containing I3 - or ReO4 - anions. The assembly of these molecular overlayers can be observed directly by in situ atomic force microscopy (AFM), and their structures can be deduced from lattice images obtained by AFM under growth conditions. AFM data reveal two different (ET)2I3 overlayers that are distinguished by the orientation of the ET molecules. One of these overlayers (type …