SCANNING PROBE MICROSCOPY OF SELF-ASSEMBLED ORGANIC MONOLAYERS

摘要

STM/AFM and LFM microscopes were used for morphological analysis of uniform and patterned self-assembled monolayers (SAMs) formed from docosanethiol (HS-(CH_2)_21CH_3), dodecanethiol (HS-(CH_2(_11CH_3) and mercaptododecanoic acid (HS-(CH_2)_11 COOH) molecules adsorbed at 200 nm gold film deposited onto silicon wafer. All measurements were performed in air. The lateral distances between atoms were determined using HOPG sample for calibration. Images obtained on clean Au substrate revealed that the surface was not uniform but was composed from flat crystallites having {111} surfaces.