Abstract
A phenomenological model of photo-induced traveling waves in liquid-crystalline Langmuir monolayers is presented. A linear stability analysis and numerical simulations of this model reveal that there are two oscillatory unstable modes with lower and higher wavenumbers which cause the traveling waves. The unstable mode with the lower wavenumber arises due to an interplay between the spontaneous splay deformation of liquid crystal order and the anisotropic photoexcitation of molecules. The other unstable mode with the higher wavenumber is concerned with the phase separation of the concentration field induced by the spontaneous splay deformation. The numerical simulations also show the coexistence between these two modes for certain parameter values.
| Original language | English |
|---|---|
| Pages (from-to) | 233/[893]-242/[902] |
| Journal | Molecular Crystals and Liquid Crystals |
| Volume | 435 |
| DOIs | |
| Publication status | Published - 2005 Jan 1 |
| Externally published | Yes |
Keywords
- Langmuir monolayers
- Nonequilibrium structures
- Photo-isomerization
- Traveling waves
ASJC Scopus subject areas
- Chemistry(all)
- Materials Science(all)
- Condensed Matter Physics