Abstract
X-ray reflectivity measurements in air of thin films of 1-alkyl-3-methylimidazolium salts in the liquid, liquid crystalline and solid states supported on Si( 111) are described. The films show Bragg features in both liquid crystalline and solid phases, but only after an initial annealing cycle. Kiessig fringes are observed only for the 1-octadecyl-3-methyl-imidazolium hexafluorophosphate films and, following analysis using Parratt32, a bi-layer model is proposed whereby the molecules are orientated with ionic groups at both salt-air and salt-silicon interfaces.
Original language | English |
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Pages (from-to) | 795-800 |
Number of pages | 6 |
Journal | Molecular Physics |
Volume | 99 |
Issue number | 10 |
Publication status | Published - 20 May 2001 |
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics