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Project
Molecular understanding of buried hybrid interfaces and transport through organic coatings: ATR FTIR in a Kretschmann configuration combined with odd random phase electrochemical multisine impedance spectroscopy (FWOKN315)
The buried interface between polymers / coatings and the supporting metal(oxide) is of the utmost importance in terms of durability and efficiency of hybrid structures. However, the access to this zone is limited, as most organic coatings are several micrometers thick. Most surface
characterization techniques cannot reach this area without the use of destructive methods - possibly altering the layer concerned. Furthermore, the same techniques often operate under vacuum conditions, hindering the analysis of electrolyte arrival at the interface. Therefore, ATR FTIR in a Kretschmann geometry opens the opportunity to measure the influence of an electrolyte at the interface of a hybrid system, even in the presence of a thick organic layer. Therefore, a thin metal film is deposited on an infrared transparent crystal, on top of which an organic layer is grown. By illuminating the crystal from the back with the infrared beam, an evanescent wave is transmitted through the metal film to the interface. As such, only interfacial adsorptions will be visualized in the infrared spectrum. As the measurements can be performed in any environment, the transport of electrolyte species through the coating can be followed with ORP MS EIS, an impedance technique that has the same measurement time scale as the infrared measurements. This way, a thorough molecular understanding of the (electro)chemical changes of a buried interface in a hybrid structure can be obtained.
characterization techniques cannot reach this area without the use of destructive methods - possibly altering the layer concerned. Furthermore, the same techniques often operate under vacuum conditions, hindering the analysis of electrolyte arrival at the interface. Therefore, ATR FTIR in a Kretschmann geometry opens the opportunity to measure the influence of an electrolyte at the interface of a hybrid system, even in the presence of a thick organic layer. Therefore, a thin metal film is deposited on an infrared transparent crystal, on top of which an organic layer is grown. By illuminating the crystal from the back with the infrared beam, an evanescent wave is transmitted through the metal film to the interface. As such, only interfacial adsorptions will be visualized in the infrared spectrum. As the measurements can be performed in any environment, the transport of electrolyte species through the coating can be followed with ORP MS EIS, an impedance technique that has the same measurement time scale as the infrared measurements. This way, a thorough molecular understanding of the (electro)chemical changes of a buried interface in a hybrid structure can be obtained.
Date:1 Jan 2019 → 31 Dec 2019
Keywords:HYBRID INTERFACES
Disciplines:Composites and hybrid materials not elsewhere classified