Statistical Theory of Helical Twisting in Nematic Liquid Crystals Doped with Chiral Nanoparticles
| Autor: | Mikhail A. Osipov, Alexander A. Ezhov, A. S. Merekalov |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Crystallography
nanocomposite Condensed matter physics General Chemical Engineering Physics::Optics Nanoparticle Gyration tensor Dielectric Condensed Matter Physics Condensed Matter::Soft Condensed Matter Inorganic Chemistry QD901-999 Polarizability Liquid crystal Phase (matter) Dispersion (optics) General Materials Science sense organs liquid crystal QA Anisotropy molecular statistical theory QC |
| Zdroj: | Crystals, Vol 11, Iss 1432, p 1432 (2021) Crystals; Volume 11; Issue 11; Pages: 1432 |
| ISSN: | 2073-4352 |
| DOI: | 10.3390/cryst11111432 |
| Popis: | A molecular field theory of the cholesteric ordering in nematic nanocomposites doped with chiral nanoparticles was developed taking into consideration chiral dispersion interaction between rod-like nanoparticles. It was shown that the inverse pitch of the cholesteric helical structure is proportional to the anisotropy of the effective polarizability and the anisotropy of the effective gyration tensor of a nanoparticle in the nematic host. The theory enables one to predict the helical sense inversion induced by a change of the low-frequency dielectric susceptibility of the nematic host phase. The components of the high-frequency effective polarizability and the effective optical activity of a gold rod-like nanoparticle in a particular nematic solvent were calculated numerically. |
| Databáze: | OpenAIRE |
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