Impact of temperature on the LB patterning of DPPC on Mica
- The influence of the subphase temperature on the stripe pattern formation during Langmuir-Blodgett transfer (LB patterning) is investigated in a combined experimental and theoretical study. According to our experiments on the LB transfer of dipalmitoylphosphatidylcholine (DPPC) on planar mica substrates, even small temperature changes between 21.5 and 24.5 degrees C lead to significant changes in the monolayer patterns. For a constant surface pressure and dipper speed, the width of the stripes and the overall spatial period of the patterns increase with increasing subphase temperature. Because the stripe patterns are ascribed to alternating monolayer domains in the liquid-expanded and the liquid-condensed phases, the working regime for the formation of stripes is found to depend strongly on the respective surface pressure-area isotherm. These experimental findings are in accordance with the results of a theoretical investigation based on a model that takes hydrodynamics and the monolayer thermodynamics into account.
Author details: | Michael H. Köpf, Heiko Harder, Jürgen Reiche, Svetlana SanterORCiDGND |
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DOI: | https://doi.org/10.1021/la202728t |
ISSN: | 0743-7463 |
Title of parent work (English): | Langmuir |
Publisher: | American Chemical Society |
Place of publishing: | Washington |
Publication type: | Article |
Language: | English |
Year of first publication: | 2011 |
Publication year: | 2011 |
Release date: | 2017/03/26 |
Volume: | 27 |
Issue: | 20 |
Number of pages: | 7 |
First page: | 12354 |
Last Page: | 12360 |
Funding institution: | Deutsche Forschungsgemeinschaft [TRR 61] |
Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Chemie |
Peer review: | Referiert |