Influence of alcohol on mechanical and electrical properties of thin organic films

• Autorzy: Martin Kopáni , Martin Weis
• Języki publikacji: EN

Abstrakty

EN

Stability of organic materials properties is essential for further applications and was intensely investigated in last few decades. The aim of this study is to detect the structural changes of dipalmitoyl-phosphatidylcholine (DPPC) monolayer as a model system of organic material under influence of alcohols solutions. As subphases of monolayers (Langmuir films), pure water, ethanol and methanol solutions were used. For detection of changes in charge states of the molecules as well as relation with structural and conformational changes, a contactless method employing Maxwell’s displacement currents (MDC) was used. In DPPC monolayer on the subphase of methanol-water, a gradual absorption of methanol molecules into the layer can appear. In DPPC monolayer on the subphase of ethanol-water adsorption of ethanol molecules on the layer can be observed. Influence of alcohols results in a significant change of mechanical and electrical properties as well as in the stability of thin films.

Słowa kluczowe

EN

Langmuir films; Maxwell displacement current; Ethanol; Methanol

• Czasopismo: Open Physics
• Rocznik: 2007
• Tom: 5
• Numer: 3
• Strony: 405-415

Daty

wydano

2007-09-01

online

2007-04-12

Twórcy

autor

Martin Kopáni

• Institute of pathology, School of Medicine, Comenius University, 811 08, Bratislava, Slovakia,

autor

Martin Weis

• Department of Physics, Faculty of Electrical Engineering and Information Technology, Slovak University of Technology, 812 19, Bratislava, Slovakia,

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Identyfikatory

DOI

10.2478/s11534-007-0013-x