Scanning tunneling microscopy studies are reported for vacuum deposited conducting films of tetrathiafulvalene (TTF) with iodine (I) codeposited on mica substrates. Molecular resolution images reveal a crystal structure consistent with that of single crystals of a material with chemical composition (TTF)7I5 with the crystal c axis parallel to the plane of the mica substrate. The imaged surface is terminated with TTF molecules, and the submicron dimension crystal planes which are observed reveal surface steps consistent with the layered and stacked nature characteristic of charge transfer salt materials.
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