Modification of Self-Assembled Monolayers of Perfluoroterphenyl-Substituted Alkanethiols by Low-Energy Electrons
| Autor: | Andreas Terfort, Björn Schüpbach, Michael Zharnikov, Frederick Chesneau, Hicham Hamoudi |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
chemistry.chemical_classification
Hydrogen chemistry.chemical_element Self-assembled monolayer Photochemistry Surfaces Coatings and Films Electronic Optical and Magnetic Materials General Energy Hydrocarbon chemistry Desorption Monolayer Electron beam processing Fluorine Organic chemistry Physical and Theoretical Chemistry Aromatic hydrocarbon |
| Zdroj: | The Journal of Physical Chemistry C. 115:4773-4782 |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/jp111710x |
| Popis: | Using self-assembled monolayers (SAMs) of perfluoroterphenyl-substituted alkanethiols (FTPn) on Au(111) as test systems, we studied the effect of low-energy (10 eV) electron irradiation on fluorinated aromatic SAMs. FTPn films were found to mimic the typical behavior of aromatic hydrocarbon SAMs under ionizing radiation. The dominant process is the cleavage of C−F bonds in the FTP moieties followed by desorption of the released fluorine atoms, rapid conformational and orientational disordering, and cross-linking between the residual skeletons of the FTP backbones. The stability of these skeletons and the development of a cross-linked network hinder other typical irradiation-induced processes such as desorption of molecular fragments and damage of the headgroup−substrate interface. Along with these findings, FTPn SAMs gave a unique possibility to monitor the destiny of the fluorine atoms, which are analogues of the hydrogen atoms in the respective hydrocarbon systems. The extent of fluorine release upon ir... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|