Comparative Investigations of the Packing and Ambient Stability of Self-Assembled Monolayers of Alkanethiols on Gold and Silver by Friction Force Microscopy

摘要: The frictional behavior of self-assembled monolayers (SAMs) formed by the adsorption alkanethiols onto silver surfaces has been investigated friction force microscopy (FFM) and compared with observed for SAMs on gold. Monolayers have from adsorbates different terminal group functionalities alkyl chain lengths. Significant differences in are two substrates, these may be interpreted terms variations packing density adsorbate molecules. collapse monolayer order following ambient oxidation conveniently studied using FFM, revealing that methyl terminated exhibit substantially enhanced stability as a consequence their increased density. Behavior is carboxylic acid SAMs, indicating constraints types different.