| Formation and structure of self-assembled monolayers of alkyl-phosphonate on mica | ||
 Atomic resolution structure of untreated mica  Mica with phosphono-octane monolayer |
The
objective of our studies was to investigate the layer formation of phosphonic
acids (with 6-18 carbon atoms) terminated self-assembling molecules on
mica from aqueous and ethanolic solution. The aggregation behavior of molecules
in the solution phase and critical micelle concentration has been determined
with surface tension measurements. Layer formation of self-assembling molecules
of alkyl-phosphonic acids has been followed by atomic force microscopy
and dynamic contact angle measurements.
Nucleation, growth and coalescence of densely packed islands of phosphonates have been recorded on mica surface. The structure of islands depends from length of alkyl chain. Self-assembly was observed not only in organic solution, but also in aqueous solution as presented by C8P. The height of C8P islands is equal with the length of molecule. Square angle lattice packing of phosphonate molecules were found on ion-exchanged mica surface. Full poster (in PDF) by András Paszternák*, Zsófia Keresztes, Ilona Felhősi, Aranka Pilbáth, Erika Kálmán |
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