Tetracyanoquinodimethane (TCNQ) deposited from acetonitrile solutions onto atomically smooth native oxide surfaces of Al(111) films was characterized by X-ray photoelectron spectroscopy (XPS) and atomic force microscopy(AFM). The XP spectra and the bearing analysis of the AFM images show that TCNQ is adsorbed onto the oxide surface as both a uniform film of anions on a nanometer scale and micron sized particles of neutral molecules.