Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 13 of 13 for “"nematic LC"”.
-
Surface Effects on Anchoring and Dynamical Interactions of Liquid Crystalline Films
… are studied on nanoscale liquid crystalline (LC) films of 4-n-pentyl-4' -cyanobiphenyl (5CB) via polarized Fourier-transform infrared (FTIR) and step-scan time-resolved vibrational (TRS) spectroscopies. Surface-induced alignments and electro-optical dynamics of these systems are examined in a …
-
Polysiloxane-based liquid crystal block copolymers for piezoelectric and mechano-optical applications
… and recent research has increased in the area of LC block copolymers. In this group, LC block copolymer research has focused on diblock copolymers with one amorphous block and one side-chain LC block, and examined fundamental phase behavior of these complex systems, and the interplay between …
-
Dynamic Plasmonic Metasurfaces in the Visible Spectrum
… used in modern commercial liquid crystal (LC) displays, including environmental, size and longevity factors. Furthermore, exploiting the wavelength and polarisation dependant scattering of nano-structures, optical components, including lenses, waveplates and holograms containing …
-
Liquid crystal adaptive planar optical devices
… studies based on using liquid crystals (LC) with planar optical lightwave components. Adaptive optical devices have been fabricated by combining LCs with direct UV written buried channel waveguide and Bragg grating structures. It has been discovered that the hysteresis seen in previous LC …
-
Organic materials with acenoid and iptycene structures
… acenequinones have excellent alignment with nematic LC hosts, indicating their potential as dichroic dyes for guest-host liquid crystal displays. In addition, the sensitivity of emission to the substitution allows the tuning of emission by functionalization of the acenequinone chromophore. …
-
Computer Simulations of Faceted Nanoparticles and Carbon Nanotubes in Liquid Crystals
… is to investigate the use of liquid crystals (LCs) to manipulate and organize faceted nanoparticles and carbon nanotubes (CNTs). Computer simulations at different levels of detail are used to study these systems. Results from this project will be relevant for potential applications of these …
-
Liquid crystalline semiconductors for organic electronics
… properties. Some of the liquid crystals (LCs) synthesised incorporate photopolymerisable diene or methacrylate end groups, situated at the peripheries of the molecular core. These photoreactive liquid crystalline monomers are often termed reactive mesogens. The generation of linearly and …
-
Studies Of Liquid Crystal Response Time
… the response time issue of the liquid crystal (LC) devices is investigated in meeting the challenges for display and photonic applications. The correlation between the LC director response time and the optical response time is derived theoretically and confirmed experimentally. A major …
-
Liquid Crystal Materials And Tunable Devices For Optical Communications
… deals with polymer-stabilized liquid crystal (PSLC) materials and devices. Three polymer-stabilized liquid crystal systems are developed for optical communications. The second part reports the experimental investigation of a novel liquid-crystal-infiltrated photonic crystal fiber (PCF) and …
-
Designing Functionality into Step-Growth Polymers from Liquid Crystallinity to Additive Manufacturing
… to its ability to impart a liquid crystalline (LC) morphology on semi-aromatic polyesters with linear aliphatic spacers. In this body of work, semi-aromatic polyesters using one of 4,4'BB's regioisomers, either 3,4'BB or 3,3'BB, largely resulted in amorphous or semi-crystalline polymers …
-
Emission properties of radiative chiral nematic liquid crystals
In this work, we calculate the density of photon states (DOS) of the normal modes in dye-doped chiral nematic liquid crystal (LC) cells in the presence of various loss mechanisms. Losses and gain are incorporated into the transmission characteristics through the introduction of a small imaginary …
-
New Carbazole Based Materials for Optoelectronic Applications
… by medium pressure liquid chromatography (MPLC) as purity is an important prerequisite for organic materials to be used for optoelectronic applications. Before the new materials were finally tested in transistor devices, a suitable surface treatment of the OFET substrates was developed. By …
-
Coupling of the electrical, mechanical and optical response in polymer/liquid-crystal composites
Micrometer-sized liquid-crystal (LC) droplets embedded in a polymer matrix may enable optical switching in the composite film through the alignment of the LC director along an external electric field. When a ferroelectric material is used as host polymer, the electric field generated by the …