Modification of pyridine-terminated aromatic self-assembled monolayers by electron irradiation

• Verfasst von: Yildirim, Can [VerfasserIn]
• Verfasst von: Sauter, Eric [VerfasserIn]
• Verfasst von: Zharnikov, Michael [VerfasserIn]
• Titel: Modification of pyridine-terminated aromatic self-assembled monolayers by electron irradiation
• Verf.angabe: Can Yildirim, Eric Sauter, Andreas Terfort, and Michael Zharnikov
• Umfang: 9 S.
• Fussnoten: Gesehen am 03.07.2018
• Titel Quelle: Enthalten in: The journal of physical chemistry <Washington, DC> / C
• Jahr Quelle: 2017
• Band/Heft Quelle: 121(2017), 18, S. 9982-9990
• ISSN Quelle: 1932-7455
• DOI: doi:10.1021/acs.jpcc.7b02153
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1577200977

Abstract

Using a series of model systems, we studied the effect of electron irradiation on pyridine-terminated aromatic thiolate self-assembled monolayers (SAMs) on Au(111). All these SAMs exhibited behavior similar to that of oligophenyl-based films, viz. a progressive and extensive cross-linking, preventing release of individual molecules and their fragments and slowing down and hindering the damage of the SAM/substrate interface. The pyridine moieties participated in the formation of the cross-linking network, which was accompanied by their chemical modification and partial hydrogenation. As a consequence, the nitrogen content in the films did not change significantly upon irradiation (only ∼10% for the densely packed SAMs) and the modified pyridine moieties became reactive toward carboxylic acid anhydrides. The extent of irradiation-induced modification and damage was found to depend strongly on the structural quality and packing density of the monolayers. The results of the experiments suggest several potential applications of pyridine-terminated aromatic SAMs in context of their modification by electron irradiation, in the framework of conventional and chemical lithography as well as advanced nanofabrication.