Materials Literature
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Mesoporous SBA-15 was synthesized using tetraethylorthosilicate (TEOS) as the silica source and Pluronic (P123) as the structure-directing agent. The defective Si-OH groups present in SBA-15 were successively grafted with 3-chloropropyl-trimethoxysilane (CPTMS) followed by tris-(2-aminoethyl) amine (TAEA) and/or tetra…
Shock-free ferroelectric liquid crystal displays with high optical contrast and low operating voltage are the concern of this contribution. Ferroelectric liquid crystal compositions with a wide temperature range of the chiral smectic C phase are designed. The influence of the chiral fragments of the molecules, especia…
We report measurements of the structural and compositional properties of a range of hydrogenated nanocrystalline films. We employed Raman spectroscopy for crystallinity and time-of-flight secondary ion mass spectroscopy (TOF-SIMS) for impurity characterizations. The crystalline volume fractions and impurity levels are…
An isolated structure emitter is presented that can deliver a field emission better than 10 mA, a level that is by far the highest ever reported. A composite of CNT (carbon nanotube) and WO(3) is used to grow the point emitter by a crystal-like growth technique. The head of the grown needle that is the emitter is remo…
In this letter, we demonstrate high slope efficiency laser emission from reflective liquid crystal laser devices with a silicon backplane. Three different cell architectures were fabricated and each resulting laser device was then characterized in terms of the excitation threshold and the slope efficiency when optical…
We investigated doxorubicin (DOX)-loaded nanospheres (NS) formulated using a biodegradable polymer, poly(D,L-lactide-co-glycolide) (PLGA), for targeted chemotherapy of brain tumours. A nonionic surfactant, polysorbate 80 (P80), was used to modify the surfaces of PLGA NS to improve cellular drug delivery. DOX-loaded PL…
We demonstrate that vertically aligned carbon nanotubes can be synthesized directly on tantalum substrate via water-assisted chemical vapor deposition and evaluate their properties as electrochemical capacitors. The mean diameter of the carbon nanotubes was <TEX>$7.1{\pm}1.5\;nm$</TEX>, and 70% of them had double wall…
Abstract Eu3+-doped CaZrO3 phosphor with perovskite-type structure was synthesized by the high temperature solid-state method. The samples were characterized by X-ray diffraction, scanning electron microscopy, fluorescence spectrophotometer and UV-vis spectrophotometer, respectively. XRD analysis showed that the forma…
Large-area graphene films, synthesized by the chemical vapor deposition (CVD) method, have the potential to be used as electrodes. However, the electrical properties of CVD-synthesized graphene films fall short of the best results obtained for graphene films prepared by other methods. Therefore, it is important to und…
A dissipative surface stress model is adopted to study the effect of size-dependent surface dissipation on natural frequencies of vibrating elastic nanowires (NWs). Euler–Bernoulli beam theory along with the classic Zener model for interior friction in the presence of an initial surface tension [C. Zener, Elasticity a…
Since noble metal nanoparticles are increasingly found in consumer goods, there is a need for information about potential impacts of these nanoparticles on cellular function to avoid environmental and health risks associated with exposure. In this study, spherical Au and Ag nanoparticles of similar size were synthesiz…
Copper(I) amidinate was investigated to produce copper films in conventional low pressure chemical vapor deposition (CVD) using hydrogen as reducing gas-reagent. Copper films were deposited on steel, silicon, and substrates in the temperature range at a total pressure of . The growth rate on steel follows the surface…
In this paper, we used combined self-consistent-field and hybrid particle-field theory to explore the self-assembly behavior of diblock copolymer-nanoparticle mixtures confined between two concentric circular walls. The simulation reveals that the structural frustration, the loss of conformational entropy of the copol…
In this work we report on the magnetic behavior of MgO thin films prepared by sputtering. A severe aging process of the ferromagnetic properties is detected in magnetic samples exposed to ambient atmosphere. However, ferromagnetism can be successively switched on again by annealing samples in vacuum. We suggest this b…
Arrays of vertically aligned gold nanotubes are fabricated over several square centimetres which display a geometry tunable plasmonic extinction peak at visible wavelengths and at normal incidence. The fabrication method gives control over nanotube dimensions with inner core diameters of 15-30 nm, wall thicknesses of…
Small angle X-ray scattering (SAXS) is a powerful characterization technique for the analysis of polymer-silica nanocomposite particles due to their relatively narrow particle size distributions and high electron density contrast between the polymer core and the silica shell. Time-resolved SAXS is used to follow the k…
The study of pressure behavior for ZnS nanorods by X-ray diffraction measurements up to 37.2 GPa is carried out. ZnS nanorods transform from the initial wurtzite phase to rock salt phase at 19.6 GPa without undergoing the transition to zinc blende structure, and this is the first report about the direct phase transiti…
A composite nanocapacitor was fabricated based on ferroelectric PbZr0.52Ti0.48O3(PZT) and half-metallic oxide La0.67Sr0.33MnO3(LSMO) with 5 nm/1 nm periodicity, respectively. X-ray θ-2θ scan and Φ-scan revealed epitaxial growth of nanocapacitors. At room temperature, a microscopic polarization of 11 μC/cm2 and magneti…
Method to prepare suspended multilayer graphene (MLG) flakes and to form highly conductive (contact resistivity of ∼0.1 kΩ μm2) and tight mechanical connection between MLG and metal electrodes is described. MLG flakes prepared from natural graphite were precisely deposited over tungsten electrodes using dielectrophore…
Niobium oxide (<TEX>$Nb_2O_5$</TEX>) and phosphated <TEX>$Nb_2O_5$</TEX> were synthesized and used as catalysts for sorbitol dehydration to isosorbide. The characterization results of <TEX>$N_2$</TEX> adsorption, XRD and <TEX>$NH_3$</TEX>-TPD revealed that the phosphoric acid modification could well prevent the crysta…