Formation of Stripes and Channels Structure of DPPC Langmuir Blodgett Monolayer at Middle Surface-Pressure

Monolayers of L-α-Dipalmitoylphosphatidylcholine (DPPC) on the air-water interface have been transferred at a middling applied surface-pressure onto the mica substrates using the Langmuir-Blodgett (LB) technique.AFM was applied to observe the formation of morphology of DPPC.Our results show that the Langmuir-Blodgett monolayers of DPPC on mica substrates generate a structured surface with periodic channels and stripes.The LB monolayers obtained at a surface pressure correspond to 20 mN/n.We take into account several explanations to understand the observed surface topological views.On the other hand, a lot of lipids, their Langmuir monolayer and Langmuir-Blodgett monolayer are excellent models of half-layer biological membranes, which can provide closer biological environment.Therefore, using the lipid Langmuir-Blodgett or Langmuir monolayer as prototype, one can simulate further biological environment and make further investigation on biomineralization mechanism of template-controlled.