Materials Literature
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Abstract Two new organically templated borates, [H 2 DAB][B 7 O 9 (OH) 5 ]·2H 2 O ( 1 ) and [H 2 DAB][B 7 O 10 (OH) 3 ] ( 2 ), have been synthesized under mild conditions in the presence of DAB acting as structure‐directing agent (DAB = 1,4‐diaminobutane). The structures were determined by single crystal X‐ray diffrac…
In this paper, the vibrational behavior of the multiwalled carbon nanotubes (MWCNTs) embedded in elastic media is investigated by a nonlocal shell model. The nonlocal shell model is formulated by considering the small length scales effects, the interaction of van der Waals forces between two adjacent tubes and the rea…
The green form of ‘<em>Glenodinium sanguineum</em> Marchesoni' <em>sensu</em> Baldi was investigated in detail by light microscopy, scanning electron microscopy, transmission electron microscopy and by analysis of the SSU- and LSU rDNA genes. These data demonstrated it to be different from the red form of ‘<em>G. sang…
Abstract In the present study, the content of diadinoxanthin (Dd) + diatoxanthin (Dt) in the diatom Phaeodactylum tricornutum was manipulated by low-light (LL) and high-light (HL) growth conditions. Cells grown in HL almost doubled the pool size of Dd cycle pigments compared to cells from a LL culture. HL-grown cultur…
The low-frequency dynamics in glasses is compared with that in icosahedral quasicrystals. For both arrangements of matter, the existence of nanometric heterogeneities, implying the existence of a nanometric inhomogeneous elastic network, is expected to play a crucial role. Thanks to this comparison, mostly based on in…
The crystal structure of the low-temperature form of anhydrous caffeine has been determined by using X-ray powder-diffraction data with a combined simulated-annealing/Rietveld method. Anhydrous caffeine crystallizes with five crystallographically independent molecules in a monoclinic C-centred unit cell with dimension…
Abstract To monitor the mineral surface coverage and energy, the inorganic cations of two clays (montmorillonite) with different surface area/cation have been exchanged by alkylammonium ions, carrying alkyl chains of different number and length. The prepared OMs were free of unreacted organic ions. With increasing len…
Abstract Molecular brushes, with side chains consisting of two copolymers: 2‐(dimethylamino)ethyl methacrylate with methyl methacrylate, and N,N ‐dimethylacrylamide with butyl acrylate were prepared by grafting‐from via atom transfer radical polymerization (ATRP). Poly(2‐(2‐bromoisobutyryloxy)ethyl methacrylate) and p…
The effects of both organically modified montmorillonite (OMMT) and Ni(2)O(3) on the carbonization of polypropylene (PP) during pyrolysis were investigated. The results from TEM and Raman spectroscopy showed that the carbonized products of PP were mainly multiwalled carbon nanotubes (MWNTs). Surprisingly, a combinatio…
We present results of a study on small stoichiometric ${\mathrm{Cd}}_{n}{\mathrm{Te}}_{n}$ $(1\ensuremath{\leqslant}n\ensuremath{\leqslant}6)$ clusters and a few nonstoichiometric ${\mathrm{Cd}}_{m}{\mathrm{Te}}_{n}$ [$(m,n=1,4,13,16,19)$; $(m\ensuremath{\ne}n)$] clusters using the density functional formalism and pro…
Spin density wave (SDW) states of a quasi-one-dimensional system with an incommensurate wave vector perpendicular to the chain have been studied in the presence of two kinds of commensurate potentials, which originate in a quarter-filled band and dimerization along the chain. In terms of a phase variable of the SDW or…
Using first-principles density functional based calculations, we study the effect of doping and pressure in manganese based pyrochlore compound,Tl$_{2}$Mn$_{2}$O$_{7}$ that exhibits colossal magneto-resistive behavior. The theoretical study is motivated by the counter-intuitive experimental observation of suppression…
We report on the fabrication and characterization of a micromechanical oscillator consisting only of a free-standing dielectric Bragg mirror with high optical reflectivity and high mechanical quality. The fabrication technique is a hybrid approach involving laser ablation and dry etching. The mirror has a reflectivity…
Single-crystalline, hexagonal covellite (CuS) nanoplatelets were successfully synthesized through a facile, inexpensive, reproducible, and improved solvothermal process in toluene at 120 degrees C for 24 h with hexadecylamine as a capping agent and copper acetate and carbon disulfide as precursors. These nanoplatelets…
Using density functional theory we examine the crystal structure and the finite-temperature thermodynamics of formation and dehydrogenation for the quaternary hydride ${\mathrm{Li}}_{4}{\mathrm{BN}}_{3}{\mathrm{H}}_{10}$. Two recent studies based on x-ray and neutron diffraction have reported three bcc crystal structu…
A systematic study of the impact of annealing on the electronic properties of single InAs/GaAs quantum dots (QDs) is presented. Single QD cathodoluminescence spectra are recorded to trace the evolution of one and the same QD over several steps of annealing. A substantial reduction of the excitonic fine-structure split…
BACKGROUND: In preclinical studies, lysolipid-based temperature-sensitive liposomes (LTSLs) containing chemotherapy drugs administered in combination with local hyperthermia have been found to increase tumor drug concentrations and improve antitumor efficacy of the drugs. We used a novel magnetic resonance imaging (MR…
Even though graphene is a low-energy system consisting of a two-dimensional honeycomb lattice of carbon atoms, its quasiparticle excitations are fully described by the $(2+1)$-dimensional relativistic Dirac equation. In this paper we show that, while the spin-orbit interaction in graphene is of the order of $4\phantom…
Effects of the solid solution and aging treatment on microstructure, hardness and electrical conductivity of the Cu alloy containing 1.1 wt% Cr were investigated. The Cu-Cr alloy contains Mn as an alloying element. The horizontal continuous casting process was applied to obtain the unidirectionally solidified billets.…
Al-doped ZnO (AZO), Ga-doped ZnO (GZO), and GZO/AZO thin films were deposited on polymer (PET) substrates with and without a ZnO buffer layer by using an r.f. magnetron sputtering technique and their structural, electrical, and optical properties were investigated to develop transparent conductors for flexible display…