Self-assembled ordered structures in thin films of HAT5 discotic liquid crystal.

Beilstein Journal of Organic Chemistry
Piero MoralesGiusy Scalia

Abstract

Thin films of the discotic liquid crystal hexapentyloxytriphenylene (HAT5), prepared from solution via casting or spin-coating, were investigated by atomic force microscopy and polarizing optical microscopy, revealing large-scale ordered structures substantially different from those typically observed in standard samples of the same material. Thin and very long fibrils of planar-aligned liquid crystal were found, possibly formed as a result of an intermediate lyotropic nematic state arising during the solvent evaporation process. Moreover, in sufficiently thin films the crystallization seems to be suppressed, extending the uniform order of the liquid crystal phase down to room temperature. This should be compared to the bulk situation, where the same material crystallizes into a polymorphic structure at 68 °C.

References

Jan 25, 1993·Physical Review Letters·D AdamK Siemensmeyer
Sep 6, 2006·Langmuir : the ACS Journal of Surfaces and Colloids·Volodimyr DuzhkoRobert J Twieg
Jun 15, 2007·Angewandte Chemie·Sabine LaschatMartin Tosoni
Nov 6, 2007·Chemical Society Reviews·Sergey SergeyevYves Henri Geerts
Nov 6, 2008·Chemical Communications : Chem Comm·Jan P F LagerwallYounan Xia

❮ Previous
Next ❯

Citations

Dec 5, 2013·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Surjya Sarathi Bhattacharyya, Yves Galerne
Jun 17, 2015·Langmuir : the ACS Journal of Surfaces and Colloids·Ji Hyun ParkGiusy Scalia
Feb 20, 2014··Massimiliano LabardiJi Hyun Park

❮ Previous
Next ❯

Methods Mentioned

BETA
optical microscopy
polarizing microscopy
thermal treatment
atomic force microscopy
AFM
X-ray
optical

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.