Measurement of the viscoelastic properties of thin surfactant films

摘要: The lateral viscoelastic properties of mica surfaces bearing deposited films phospholipids have been determined. These experiments conducted using a modified form the surface forces apparatus, SFA. In this experiment monolayer phospholipid is onto two from Langmuir–Blodgett deposition trough. are then placed in contact A small displacement, typically 100 nm, applied sinusoidal manner to one through piezoelectric bimorph. second bimorph acts receiver. From amplitudes and phase angle input output signals, molecular may be results show that all were more elastic than viscous, consequence high pressures at which transferred Langmuir trough, modulus decreased with increasing load surfaces.