Materials Literature
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Aromatic azo compounds have a wide range of industrial applications as dyes in optical and color-changing materials and can also be exploited in the design of new photodynamic molecular systems. The azo derivative 1-(cyclopropyl)diazo-2-naphthol was isolated in low-temperature cryogenic matrices, and its molecular str…
Many applications, such as magnets and SMES, are usually charged and discharged under a bias DC current, which may increase the AC loss. For their design, it is necessary to understand and predict the AC loss. This article analises the AC loss in magnet-like coils under DC bias contribution super-imposed to the AC cur…
Tubular anodic alumina membranes, containing self-ordered and circular pores below 100 nm, were used to produce sunflower oil in water emulsions. Span 80 and Tween 20 were used as surfactants in the dispersed phase and continuous phase, respectively. Both dead-end and cross-flow processes were investigated. Membrane p…
Using x-ray magnetic circular dichroism, we show that Co porphyrin molecules adsorbed on graphene-covered Ni surfaces possess a huge in-plane (IP) orbital magnetic moment of the Co ions, despite their fourfold coordination, even comparable in size to the spin moment. Both are antiferromagnetically coupled to the Ni sp…
Amphiphilic proteins and peptides can induce the formation of stable and metastable pores in membranes. Using coarse-grained simulations, we have studied the factors that affect structure of peptide-stabilized pores. Our simulations are able to reproduce the formation of the well-known barrel-stave or toroidal pores,…
Sodium salt heparins of both reactive and pharmaceutical grade were used as the reducing and stabilizing agents for the UV photochemical synthesis of gold nanoparticles. Reduction of chloroauric acid, HAuCl 4 , by heparin using UV irradiation as a catalyst is a simple, inexpensive method with direct biofunctionalizati…
La0.67Ba0.33MnO3 thin films were epitaxially grown on (111)-oriented 0.31Pb(In1/2Nb1/2)O3-0.35Pb(Mg1/3Nb2/3)O3-0.34PbTiO3 ferroelectric single-crystal substrates. During ferroelectric poling and polarization rotation, the resistance of La0.67Ba0.33MnO3 films tracks the electric-field-induced in-plane strain of substra…
Cancer differentiation therapy is an attractive concept and has been clinically used to treat leukemia. However, it is limited to date for solid tumors. In this study, the pH-sensitive nanoparticles based on poly(amidoamine) (PAMAM) dendrimers are synthesized by coupling 3,4,5,6-tetrahydrophthalic anhydride with the f…
Within the framework of Hubbard model, a bowtie-shaped graphene nanoflake is identified to undergo an electric-field induced phase transition from an antiferromagnetic ground state. Unlike the case of half-metallic graphene nanoribbons, the electric field here leads to a non-magnetic state instead of ferromagnetic sta…
We report pulsed laser deposition (PLD) using a solid carbon source as a viable technique to obtain direct, transfer-free monolayer and bilayer graphene on SiO2. First, a 300 nm thick nickel film is deposited on a silicon dioxide layer (300 nm) grown in a Si substrate. Next, PLD of carbon is performed at 1010 °C. The…
A homologous series of the phthalocyanine-fullerene dyads, Cn-PcM(OFbaC60) (n = 6, 8, 10, 12; M = Cu , Ni , Co : 3a–3f) have been synthesized to obtain homeotropic alignment at rt and investigate the effects of spacer chain length (n = 6, 8, 10, 12) and central metal ( M = Cu , Ni , Co ) on the mesomorphism. Interesti…
ZnO/Zn0.85Mg0.15O asymmetric double quantum well (ADQW) and multiple quantum well (MQW) were fabricated with plasma assisted molecular epitaxy on c-plane sapphire, with their optical properties and optical pumped lasing characteristics studied. Due to the good crystalline quality, the lasing threshold of the MQW is ∼2…
Polylactide (PLA) is a class of promising biomaterials that hold great promise for various biological and biomedical applications, particularly in the field of vascular tissue engineering where it can be used as a fibrous mesh to coat the inside of vascular prostheses. However, its hydrophobic surface providing nonspe…
Using density-functional theory in the restricted-orientation approximation, we analyze the liquid-crystal patterns and phase behavior of a fluid of hard rectangular particles confined in a two-dimensional square nanocavity of side length H composed of hard inner walls. Patterning in the cavity is governed by surface-…
Thin films of nominally pure and 10 mol % Gd-doped ceria were grown on Al 2 O 3 ⟨11̅02⟩ (r-cut) and MgO⟨100⟩ substrates with pulsed laser deposition (PLD). Their electrical conductivity properties were measured using impedance spectroscopy. Oxygen partial pressure and temperature dependence indicate that the nominally…
A single carbon nanotube diode is reported, with Ti and Pd contacts, and split gates. Without gate bias the device displays strong rectification, with a leakage current (I0) of 6 × 10−16 A, and an ideality factor (η) of 1.38. When the gate above the Ti contact is biased negatively the diode inverts. When positive bias…
The thermotropic properties and self-assembly of two different series of hexa-peri-hexabenzocoronenes (HBC) bearing either linear or branched perfluoroalkylated side chains, each with a wide range of alkyl spacer and perfluorinated tail lengths, have been studied. Correlations between thermogravimetric analysis, diffe…
We have studied the magnetic properties of Sr2CoO4 (SCO) thin film. Magnetic hysteresis loops of the film divulge two-phase-like magnetic behavior consisting of hard and soft magnetic phases. Temperature dependent magnetization measurements and time evolution of thermo-remanent magnetization relaxation indicate the po…
The spatial variation of thermal emission from large area graphene grown by chemical vapor deposition, transferred onto SiO2/Si substrates and fabricated into field effect transistor structures, has been investigated using infra-red microscopy. A peak in thermal emission occurs, the position of which can be altered by…
The properties of V2O5 semiconductor nanowires have been investigated using ultrashort transient absorption spectroscopy in conjunction with time resolved photoluminescence. Femtosecond pulse excitation has been utilized to generate non equilibrium carrier densities above the band edge of the Nanowires (NWs), and non-…