Book title: Interfacial design & chemical sensing
Editors: Mallouk TE, Harrison DJ
City: Washington DC
Series title: ACS Symposium Series
Volume number: 561
Abstract: We have used self-assembly chemistry to synthesize monolayer assemblies that function as molecular recognition interfaces. In the first part of this paper, we show that one-component self assembled n-alkanethiol monolayers with carboxylic acid functionalized endgroups specifically adsorb vapor-phase acid terminated molecules via hydrogen bonding or vapor-phase amine terminated molecules via proton-transfer interactions. In the second part, we demonstrate that two-component monolayers, which consist of inert n-alkanethiol framework molecules and defect inducing template molecules, can discriminate between solution phase probe molecules based on their physical and chemical characteristics. By electrochemically etching the defects and then imaging the resulting surface by scanning tunneling microscopy the defect sites can be indirectly visualized.