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Modification of Pyridine-Terminated Aromatic Self-Assembled Monolayers by Electron Irradiation
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2017-04-28 00:00:00 , DOI: 10.1021/acs.jpcc.7b02153 Can Yildirim 1 , Eric Sauter 1 , Andreas Terfort 2 , Michael Zharnikov 1
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2017-04-28 00:00:00 , DOI: 10.1021/acs.jpcc.7b02153 Can Yildirim 1 , Eric Sauter 1 , Andreas Terfort 2 , Michael Zharnikov 1
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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.
中文翻译：
电子辐照修饰吡啶末端的芳香自组装单分子膜
使用一系列模型系统，我们研究了电子辐照对Au（111）上吡啶末端的芳族硫醇盐自组装单分子膜（SAMs）的影响。所有这些SAM都表现出与基于低聚苯基的薄膜相似的行为，即。进行性和广泛的交联，防止单个分子及其片段的释放，减慢速度并阻碍SAM /底物界面的破坏。吡啶部分参与了交联网络的形成，并伴随着它们的化学修饰和部分氢化。结果，膜中的氮含量在辐照后不会发生显着变化（对于致密堆积的SAM而言仅为约10％），并且改性的吡啶部分对羧酸酐具有反应性。发现辐照引起的修饰和破坏的程度在很大程度上取决于单层的结构质量和堆积密度。实验结果表明，在常规和化学光刻以及先进的纳米加工的框架内，吡啶末端的芳族SAMs在通过电子辐照进行修饰的背景下具有多种潜在应用。
更新日期：2017-04-28
中文翻译：
电子辐照修饰吡啶末端的芳香自组装单分子膜
使用一系列模型系统，我们研究了电子辐照对Au（111）上吡啶末端的芳族硫醇盐自组装单分子膜（SAMs）的影响。所有这些SAM都表现出与基于低聚苯基的薄膜相似的行为，即。进行性和广泛的交联，防止单个分子及其片段的释放，减慢速度并阻碍SAM /底物界面的破坏。吡啶部分参与了交联网络的形成，并伴随着它们的化学修饰和部分氢化。结果，膜中的氮含量在辐照后不会发生显着变化（对于致密堆积的SAM而言仅为约10％），并且改性的吡啶部分对羧酸酐具有反应性。发现辐照引起的修饰和破坏的程度在很大程度上取决于单层的结构质量和堆积密度。实验结果表明，在常规和化学光刻以及先进的纳米加工的框架内，吡啶末端的芳族SAMs在通过电子辐照进行修饰的背景下具有多种潜在应用。
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