Materials Literature
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Spontaneous polarization (P s ), rotational viscosity (η) and response time (τ) have been determined as a function of temperature at different electric fields for an antiferroelectric liquid crystal [4,4-(1-methyloctyloxycarbonyl)phenyl]-4′-[3-(butanoiloxy)prop-1-oxy]biphenyl carboxylate (MOPB(H)PBC). Spontaneous pola…
Fabrication of operable surface-stabilized ferroelectric liquid crystals (SSFLC) is often hampered by the occurance of zigzag defects. This defect formation can, to some extent, be controlled or eliminated in SSFLCs in which the rubbing directions are set parallel. In this study, we try to fabricate a defect-free SSFL…
Polymer-stabilized ferroelectric liquid crystals (PSFLCs), in which a photocurable mesogenic monomer is doped into a ferroelectric liquid crystal and a UV photocure is carried out in the SmC* phase under the application of a bipolar AC electric field, show the monostable V-shaped electrooptical characteristics. In thi…
Abstract Non‐substituted or mono‐substituted 11‐cyano or 11‐thiocyanato undecanoic acid phenylamide derivatives were synthesized and characterized with their FT‐IR and 1 H‐NMR spectra. Thereafter, their corrosion prevention efficiencies were investigated. All compounds were tested with steel coupons in acidic medium b…
This paper deals with a simple and green method to synthesize N -methyl aniline under mild condition. A series of mixed metal salt (Zn and Cu salts) modified kaolin catalysts used in the above-mentioned reaction were synthesized and characterized by a Fourier transform infrared spectrometer (FTIR), X-ray diffraction (…
Effect of in situ annealed SnO2 buffer layer on structural and electrical properties of (0 0 1) SnO2/TiO2 heterostructures, Okude, Masaki, Ueno, Kazunori, Itoh, Shun, Kikuchi, Masae, Ohtomo, Akira, Kawasaki, Masashi
Transition properties of a homologous series of novel S-shaped oligomers on varying the spacer length, core structure and linking group were investigated. All the S-shaped oligomers showed a nematic (N) phase on cooling. Formation of the N phase is interpreted in terms of the length to diameter (L/D) ratio, indicating…
Endohedral N@${\text{C}}_{60}$ exhibits an extremely long electron spin relaxation time and offers a great potential in storing and processing quantum information. Here, we present a microscopic theory of electron spin relaxation in N@${\text{C}}_{60}$. The theory combines (1) the spin-orbit interaction of $\text{N}\t…
A density functional study on transition-metal-coated single-walled carbon nanotubes shows that there are both magnetic and nonmagnetic materials, depending on the nature of the transition metals and their adsorption sites. Adsorption of transition metal atoms to a nanotube is energetically favorable. It is found that…
Preparation and characterization of a new series of all-organic ferroelectric liquid crystalline (LC) materials, 4-alkoxyphenyl trans-4-[5-(4-alkoxyphenyl)-2,5-dimethylpyrrolidine-1-oxyl-2-yl] benzoates (2), which are the structural isomers of the previously reported trans-2-alkoxyphenyl-5-[4-(4-alkoxybenzenecarbonylo…
Experimental solubilities are reported for terephthalic acid (TA) in binary mixtures of N -methyl pyrrolidone (1) + water (2) and N, N -dimethyl acetamide (1) + water (2) in the temperature range of (303.2 to 363.2) K. The mole fraction of water in the N -methyl pyrrolidone + water solvent mixtures x 2 ranges from 0 t…
The synthesis, structure, and optical and electrochemical properties of thiophene-containing hybrid calixphyrins are reported. The 5,10-porphodimethene type 14pi- and 16pi-S,N2,X-hybrid calixphyrins (X = NH, O, S) were prepared by acid-promoted dehydrative condensation between a thiatripyrrane and the corresponding 2,…
The homologous series of mesogenic (S)-4″[n-(perfluoroalkanoyloxy)hexyl-1-oxy]-4-(1-metylheptyloxy-carbonyl)terphenyl compounds exhibiting low temperature, wide range, near orthoconic antiferroelectric phase has been synthesized [1 Kula, P., Dabrowski, R., Kenig, K. and Chyczewska, D. 2006. New antiferroelectric compo…
The promising materials for applications are Antiferroelectric Liquid Crystals. Two dielectric modes were detected in AFLCs, as far [1 Lagerwall, S. T. 1999. Ferroelectric and Antiferroelectric Liquid Crystals, Wiley-VCH. [Crossref] , [Google Scholar], 2 Haase, W. 2003. St. Wróbel, Relaxation Phenomena, Springer-Verla…
The recent observation of a pressure-induced insulator to metal ($I\mathrm{\text{\ensuremath{-}}}M$) transition in pure ${\mathrm{LaMnO}}_{3}$ [I. Loa et al., Phys. Rev. Lett. 87, 125501 (2001).], opens the way to a study of the role of the orbital degrees of freedom on the electronic structure in a stoichiometric mat…
The products derived from thermal decomposition of NH 4, K, and Na dawsonites have structural memory; that is, the original mineral structure in ammonium form (NH 4 AlCO 3 (OH) 2 ) is recovered upon treatment of the oxide in aqueous (NH 4 ) 2 CO 3 solution under mild conditions at pH ∼ 10. The memory effect holds in a…
The influence of hydrogen passivation on luminescence-center-mediated excitation of ${\text{Er}}^{3+}$ in Er-doped Si-rich ${\text{SiO}}_{2}$ films with significantly different microstructures is studied. Photoluminescence measurements are presented for samples containing no detectable silicon nanocrystals (annealed a…
Halogen-containing polymers and copolymers have been discovered to provide excellent encapsulation matrixes for making bright and monodispersed phosphorescent nanoparticles. The phosphorescent nanoparticles exhibit strong phosphorescence with long lifetime and large Stoke shift under ambient conditions. The cross-link…
We calculate here the dielectric constant ϵ as a function of temperature for the AC* phase transition of a ferroelectric liquid crystal using a mean field model. Using the values of the polarization P and the tilt angle θ, calculated from the mean field model with the P2θ2 coupling for 4-(3-methyl-2-chlorobutanoyloxy)…
The temperature dependence of the polarization P and the tilt angle θ is calculated here in the presence of a constant electric field near the smectic AC* phase transition of a ferroelectric liquid crystal using a mean field model. We demonstrate here the temperature dependence of P and θ under some fixed electric fie…