Plastic flow regimes in Langmuir monolayers
Departament de Química Física, Universitat de Barcelona, 1 Martí i Franqués, 08028 Barcelona Catalonia, Spain
We look at bulk-like viscoplastic properties of a metastable Langmuir mono layer of an alkanethiol derivative close to collapse conditions. By performing controlled creep experiments (decrease of molecular area at constant surface pressure) we were able to evidence two regimes of plastic flow, below and above a pseudo two dimensional melting point, with distinctive temperature dependencies.
© EDP Sciences, Springer-Verlag, 2007