Domain observation and molecular orientation of chiral dipalmitoylphosphatidylcholine monolayer by Brewster angle microscopy and Maxwell displacement current
| Autor: | Mitsumasa Iwamoto, Tetsuya Yamamoto, Takaaki Manaka, Wei Ou-Yang, Takahiro Aida |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2008 |
| Předmět: |
Brewster's angle
Displacement current Chemistry Metals and Alloys Surfaces and Interfaces Molecular physics Surfaces Coatings and Films Electronic Optical and Magnetic Materials symbols.namesake Crystallography chemistry.chemical_compound Dipalmitoylphosphatidylcholine Monolayer Domain (ring theory) Microscopy Materials Chemistry symbols Molecule Chirality (chemistry) |
| Zdroj: | Thin Solid Films. 516(No. 9):2649-2651 |
| Popis: | To understand the relationship between molecular chirality and electrical properties of monolayers, Maxwell displacement current (MDC) behaviors and domain shapes of chiral DPPC monolayers composed of dextro- ( d -) and levo- ( l -) rotatory molecules at the air–water interface are investigated during monolayer compression using MDC measurement and the Brewster angle microscopy (BAM) system. The experimental results show that for DPPC monolayers of the two pure enantiomers, the π-A isotherms and the MDC behaviors are similar to each other, while the domain patterns of them are mirror shapes of different sizes. This reveals that MDC behaviors due to molecular spontaneous polarization have no relation to chirality but domain shapes closely depend on the molecular chirality. Moreover, the observed domain shapes verify the domain shape theory which was recently developed by Iwamoto et al. [M. Iwamoto, Z.C. Ou-Yang, Phy. Rev. Letts, 93 (2004) 206101]. |
| Databáze: | OpenAIRE |
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