Imaging of Organic Molecules by Atomic Force Microscopy

Abstract
We have investigated the cleaved surfaces of polydiacetylene crystals, poly-PTS (2,4-hexadiyne-1,6-diol p-toluene-sulfonate) and poly-DFMP (poly-bis[2,2',5,5'-tetraaxistrifluoromethyl-phenyl]butadiene), and liquid-crystal molecules, 8CB (4'-n-octyl-n-cyanobiphenyl), on graphite by atomic force microscopy. Molecular resolved images of each sample were successfully obtained. The contrast mechanism of 8CB for the atomic force microscope (AFM) is discussed.