Scanning Force Microscopy Characterization of Langmuir-Blodgett Films of Sulfur-Bearing Lipids on Mica and Gold

Article Article scientifique Article Scanning Force Microscopy Characterization of Langmuir-Blodgett Films of Sulfur-Bearing Lipids on Mica and Gold eng 1995 author Santesson Lars 29732 author Wong Timothy 29806 author Taborelli Mauro 27386 author Descouts Pierre 25266 author Liley Martha author Duschl Claus author Vogel Horst 1038-1045 10.1021/j100003a029 0022-3654 http://pubs.acs.org/doi/abs/10.1021/j100003a029 Physisorbed and covalently bound Langmuir-Blodgett (LB) monolayers of sulfur-bearing lipids on mica and on gold substrates, respectively, have been studied. Scanning force microscopy, in topography and friction modes as well as in contact and noncontact modes have been used to investigate these films in the region of coexisting phases. For the first time, a detailed and complex internal structure of solid-analogous monolayer domains, reflecting their symmetric morphology, has been observed. Comparisons of physisorbed monolayers on mica with chemisorbed monolayers on gold show distinct differences in the structure and stability of the films caused by the different substrate/film interactions. It is found that the use of a substrate to which the film can bind covalently does not result in changes to the morphology of solid-analogous domains in the films. The structure of covalently bound monolayers is well-preserved over long time periods and is stable at solid/fluid interfaces. However, the covalently bound LB monolayers are more susceptible to damage by the SFM tip than the physisorbed films on mica. Dewey 500.2 35 Groupe de physique appliquée 135 false Journal of Physical Chemistry 99 3 43b046fc-a44d-4c73-8181-d50eaa87de01 Article (Published version) Restricted j100003a029.pdf 3810680 application/pdf restrictedAccess Faculté des sciences / Section de physique / Groupe de physique appliquée

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Scanning Force Microscopy Characterization of Langmuir-Blodgett Films of Sulfur-Bearing Lipids on Mica and Gold	Journal of Physical Chemistry			1995	432	0

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Santesson, Lars