Electroconvection in nematic liquid crystals via nanoparticle doping

Nanoscale
Martin UrbanskiHeinz-S Kitzerow

Abstract

It is known that a small fraction of nanoparticles dispersed in a liquid crystal can alter the electrooptic response, completely. The present study on gold nanoparticles dispersed in 5-n-heptyl-2-(4-n-octyloxy-phenyl)-pyrimidine shows that the contrast inversion observed earlier is initiated by a change from parallel to homeotropic anchoring, thereby causing an instability, which in turn leads to the appearance of convection rolls. After rapid cooling from the isotropic phase, the nanoparticle dispersion shows a regular field-induced Fréedericksz transition, like the pure liquid crystal. The electrohydrodynamic instability is presumably an example for the behavior of (+, -) systems that was predicted by de Gennes, and only recently observed experimentally for the first time.

References

Oct 9, 2002·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Jong-Hoon HuhShoichi Kai
Jan 7, 2003·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·A BukaW Pesch
Apr 12, 2003·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·B Dressel, W Pesch
Aug 25, 2004·Physical Review Letters·A BukaW Pesch
Aug 25, 2004·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Elzbieta KochowskaAgnes Buka
Dec 31, 2005·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·D WiantT Tóth-Katona
Dec 13, 2006·Physical Review Letters·Fenghua LiJohn L West
Mar 6, 2007·The European Physical Journal. E, Soft Matter·M-G TambaR Stannarius
Mar 21, 2008·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Alexei KrekhovAgnes Buka
Jul 23, 2008·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Jana HeuerWolfgang Weissflog
Dec 17, 2009·The Journal of Physical Chemistry. B·Pramod TadapatriK S Krishnamurthy
Apr 2, 2010·ACS Applied Materials & Interfaces·Hao Qi, Torsten Hegmann

❮ Previous
Next ❯

Citations

Mar 6, 2013·Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences·Javad MirzaeiTorsten Hegmann
Feb 1, 2014·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Martin UrbanskiHeinz-S Kitzerow
Mar 13, 2014·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Javad MirzaeiTorsten Hegmann
Jan 23, 2018·Beilstein Journal of Nanotechnology·Agata SiarkowskaTomasz R Woliński

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.

Related Papers

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
K I Morozov
Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics
V Nazarenko, A Nych
Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
Erfan Kadivar
© 2021 Meta ULC. All rights reserved