Anthraquinonc-2-carboxylic acid (AQ-2-COOH) deposited from acetone Solutions onto native oxide surfaces of Al films was characterized by inelastic electron tunneling spectroscopy (IETS), X-ray photoelectron spectroscopy (XPS), and atomic force microscopy (AHM). These Surface analyses show that AQ-2-COOH is adsorbed on the oxide as both a uniform film of anions on a nanometer scale and micron-sized particles of neutral molecules.