Based on theoretical, empirical and semi-empirical models, extensive literature covers various approaches to characterize the mechanical properties of polymer composites filled with different reinforcements. However, those published models show discrepancy results obtained from experiments. The above situation has been modified by using a nonlinear polynomial regression technique in these models. This paper reports how cardinal are used, which is very important for anybody who thinks about...

The photoluminescence spectra of chiral nematic liquid crystals doped with dodecanethiol-functionalised silver nanoparticles has been investigated. peak intensity level the in PL was found to be consonant concentration (0.005–0.020 wt%) nanoparticles. An uptrend enhancement also recorded up till 0.015 wt% dopant concentration, above which a fall recorded. A significant shift position detected concentration. Electrically induced optical hysteresis observed samples, virtually vamooses at 0.020...

AbstractAn optical tunable shutter is fabricated by the dispersion of chiral dopant into nematic liquid crystal mixture and stabilised UV-cured fibrous network. These aggregates provide stability to molecules show highly fluorescent scattered state. The electrical tuning photoluminescence in shows a decrease fluorescence intensity during stage triggering from homogeneous homeotropic improves contrast devices, which can be used as switchable windows with desirable optimum voltage.Keywords:...

AbstractAn electro-optic tunable device is fabricated by the incorporation of silica nanoparticles as a dopant into polymer-dispersed liquid crystal composite film followed UV curing through polymerisation-induced phase separation process. These silica-modified fibrous aggregates polydimethylsiloxane provide stability to nematic molecules. The interaction between dispersed and modified polymer network improves polymer/liquid interface, which was successfully analysed scanning electron...

Octadecylamine-functionalised single-walled carbon nanotubes (SWCNTs) were dispersed into nematic liquid crystals (LCs) doped with chiral molecules. The collective orientation of LC molecules in helical layers was manipulated by varying dopant concentration. Highly anisotropic nature SWCNTs enhanced the anisotropy as confirmed polarised fluorescence spectroscopy. π–π interaction present planar alignment and twisted affects molecular relaxation process. An irreversible electro-optic memory...

Guest–host polymer stabilised ferroelectric liquid crystal (PSFLC) composite films have been prepared by polymerisation-induced phase separation process. A small quantity (0.1, 0.25 and 0.5 wt %) of anthraquinone dye in PSFLC host matrix was homogeneously dispersed to create molecular ordering fibrils network guest–host film. Ordered twisted fibril morphology clearly observed through optical polarising microscope thus we determined the order parameter from dichroism measurements with help...

In the present communication, we report on synthesis and electro-optic investigation of photosensitive CdSe quantum dots (QDs) dispersed polymer stabilised liquid crystal (PSCLC) luminescent gel. The assembly fluorescence properties QDs facilitate anisotropy PSCLC gel hence manipulates optical switching properties, which was further investigated using polarised spectrophotometer. circularly intensity tuned electrically so as to affect orientations in helix. It found that behaviour QDs-doped...

Abstract A novel method for the continuous dispersion of carbon nanofibers (CNFs) in a polymer matrix manufacturing high performance nanocomposites was developed using an ultrasonically assisted single screw extrusion process. The effect ultrasound on die pressure, electrical and thermal conductivity, rheological, morphological mechanical properties polyetherimide (PEI) filled with 1 to 20 wt.% CNFs studied. reduction pressure percolation threshold CNF/PEI permanent increase viscosity...

Electro-optic and molecular relaxation studies in a new achiral unsymmetrical four-ring bent-core mesogen are presented this study. The compound consists of laterally fluoro-substituted 3,4′-disubstituted biphenyl unit with an ester linkage between the two phenyl rings as central unit. mesomorphic properties were characterised by polarising optical microscopy differential scanning calorimetry. exhibited enantiotropic B7–Bx phase sequence. electro-optic revealed bistable switching from planar...

Multiwalled carbon nanotubes functionalized with COOH were dispersed into induced chiral nematic liquid crystals confined in a planar aligned cell. Dopant concentration was varied to investigate electro-optical behaviour and morphology of the doped samples presence surface anchoring forces. An increase conductivity, refractive index, dielectric constant material observed. Polarized fluorescence spectroscopy confirmed anisotropic changes brought by CNT doping. A significant change onset...

Guest–host polymer-stabilised ferroelectric liquid crystal (GH-PSFLC) composite films have been prepared with dispersion of small concentration (0.1, 0.25 and 0.5 wt%) anthraquinone blue dye in PSFLC host matrix via a polymerisation-induced phase separation (PIPS) process. The variation alignment size twisted fibril has observed the optical textures guest–host composites different wt/wt ratio dye. electrical dielectric properties mixture its derivatives are studied. Our results showed that...

Simulation approaches based on Deep Learning (DL) techniques have several computational stages that present information at various levels of complexity. DL has exploded in popularity over the last decade, mainly medical image analysis, retrieval, and biology. As a result, effectively transformed enhanced detection, forecast, treatment sectors, including pathological, brain tumors, lung disease, stomach, heart, eye. This study introduces unique classification fuzzy logic-based deep neuro...

Views Icon Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Twitter Facebook Reddit LinkedIn Tools Reprints and Permissions Cite Search Site Citation Rishi Kumar, K. Raina; Polymer Stabilized Liquid Crystals: Materials, Physics Applications. AIP Conference Proceedings 12 December 2011; 1393 (1): 46–49. https://doi.org/10.1063/1.3653605 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar...

Cholesteric liquid crystals are known as 1-D photonic band gap materials due to their periodic helical supramolecular structure and larger birefringence. Depending upon the twisted pitch length, they give characteristic contrast selective Bragg reflections when viewed through polarizing optical microscope hence affect electro-optic properties. So optimization of chiral dopant concentration in nematic crystal leads control transmission polarized light microscope. Hence based is used for...

Let $(a_n)_{n=0}^\infty$ be a second-order linear recurrence sequence with constant coefficients over the field of $p$-adic numbers $\mathbb{Q}_p$. We study set limit points consecutive ratios $(a_{n+1}/a_{n})_{n=0}^\infty$ in

Two lattice points are visible from one another if there is no point on the open line segment joining them. Let $S$ be a finite subset of $\mathbb{Z}^k$. The asymptotic density set points, all $S$, was studied by several authors. Our main result an improved upper bound error term. We also find Schnirelmann some sets S. Finally, we discuss these questions view ergodic theory.

Let $M(n, k, p)$ denote the maximum probability of event $X_1 = X_2 \cdots X_n=1$ under a $k$-wise independent distribution whose marginals are Bernoulli random variables with mean $p$. A long-standing question is to calculate for all values $n,k,p$. This has been partially addressed by several authors, primarily goal answering asymptotic questions. The present paper focuses on obtaining exact expressions this probability. To end, we provide closed-form formulas $M(n,k,p)$ $p$ near 0 as well 1.

Abstract Let ( a n ) n=0 ∞ be second-order linear recurrence sequence with constant coefficient. We study the limit points and asymptotic distribution of consecutive ratios +1 / .

When an electric field is applied to thin film of a chiral doped nematic liquid crystal, unwinding the helix takes place. Due competition elastic forces material with electrical and surface anchoring forces, defect lines are created. Sometimes after removal field, system does not relax back original state shows optical electro-optical hysteresis. The induction memory as result manipulation director remains active study can be useful for development based bistable low power devices.