Materials Literature
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Series of Er-doped Si-rich silicon oxide layers were studied with the aim of optimizing the coupling between Er ions and the Si-based sensitizers. The layers were grown at substrate temperature between 400 and 600°C by the cosputtering of three confocal targets: Si, SiO2, and Er2O3. The influence of Si excess (5–15at.…
Amorphous As4Se3 thin films were prepared by pulsed laser deposition technique. Variable angle spectroscopic ellipsometry was used for the study of reversible photoinduced phenomena in well-annealed films. Tauc–Lorentz and Cody–Lorentz models were employed for the analysis of ellipsometric data. Reversible photorefrac…
355 nm diode-pumped solid-state (DPSS) ultraviolet (UV) laser-induced surface texturing on a Si substrate is reported in this paper. Surface patterns consisting of miro-size pits were produced by direct laser ablation. By fine-tuning key process variables such as laser beam fluence, pulse number, and beam spot separat…
Nanocrystalline samples of sodium doped manganites with compositional formula La1−xNaxMnO3 (0.025⩽x⩽0.25) were prepared by polyvinyl alcohol assisted precursor method. After characterizing the samples by x-ray diffraction and transmission electron microscopy a systematic investigation of electrical, magnetic, and ther…
A series of Co3−xMnxO4 (x=0.1–1.0) multiferroic cubic spinel ceramics were prepared to study the effect of Mn substitution at Co site on the crystal structures and dielectric properties. No significant change in the structural symmetry was observed with increasing x up to 1.0. A linear increase in lattice parameter wi…
The aim of this work is to explore a new method for producing spun yarn on a modified ring spinning system which is called “clusterspun yarn”. Here, we describe the effects of the clustering of polyester multifilaments on the internal structure and properties of a composite yarn. Cotton fibers and polyester multifilam…
Carbosilane dendrimers can be used as soluble supports for organic synthesis, since their structure allows separation of excess reagents from the supported products, eventually yielding products of high purity and in high yield, as in solid-phase organic synthesis (SPOS). In previous studies often loss of dendritic ma…
Electrostatic self-assembly was used to fabricate new smart multi-layer coatings, using a recombinant elastin-like polymer (ELP) and chitosan as the counterion macromolecule. The ELP was bioproduced, purified and its purity and expected molecular weight were assessed. Aggregate size measurements, obtained by light sca…
In spin-driven ferroelectrics, often referred to as magnetoelectric (ME) multiferroics, a domain wall separates two magnetic as well as ferroelectric domains. Therefore, it is expected that the control of such an ME domain wall could result in a large ME effect. Here, we show that the direction of a slanted magnetic f…
The adsorption of a series of charged bottle-brush polymers with side chains of constant length on mica and silica surfaces is modeled using a lattice mean-field theory, and the predicted results are compared to corresponding experimental data. The bottle-brush polymers are modeled as being composed of two types of ma…
Abstract Polymer nanocomposites based on thermoplastic polyurethane (TPU) containing organophilic montmorillonite (OMMT) were prepared by melt compounding method followed by compression molding. Different percentage of organically modified nanoclays (1, 3, 5, 7, and 9 wt%) was incorporated into the TPU matrix in order…
We investigated the growth mechanisms of (110) SnO2 on (110) TiO2 by varying tin fluxes under a fixed oxygen pressure by plasma-assisted molecular beam epitaxy. A growth diagram was constructed that consists of two distinct growth regimes: an increase in growth rates in an oxygen-rich environment and a decrease in gro…
We report the success in fabricating clamped, “island,” and freestanding 10 μm thick piezoelectric films using aerosol deposition. The deposition was conducted at room temperature by impinging the piezoelectric particles flowing through the nozzle onto platinized silicon (Pt/Ti/SiO2/Si) substrate and crystallization w…
A single-phased PrCo2B2 compound was prepared by an arc-melting method. The magnetic properties and magnetocaloric effect (MCE) were studied by the magnetization and heat capacity measurement. The compound exhibits a single paramagnetic to ferromagnetic transition at the Curie temperature TC of 18 K. A large reversibl…
Under the local-spin density approximation method plus on-site coulomb interaction U correction (LSDA+U), the BaCrO3 in the perovskite structure is found to be half-metallic ferromagnet with an integral magnet moment of 2.000 Bohr magnetons (μB) per unit. The feasibility of constructing the BaCr0.5Ti0.5O3 superlattice…
Tetraethoxysilane (TEOS) is used as a precursor in the industrial production of silica nanoparticles using thermal decomposition methods such as flame spray pyrolysis (FSP). Despite the industrial importance of this process, the current kinetic model of high-temperature decomposition of TEOS to produce intermediate si…
Vector dissemination, transient gene expression, and rapid clearance are major obstacles to successful human gene therapy. In this study, we investigated the effect of silk-elastinlike protein polymer (SELP) hydrogels on biodistribution and anticancer efficacy of adenoviral gene therapy in a head and neck cancer model…
Carrier injection performed in doped-manganite junction exhibits stable resistance switching effect and variety of interface barrier adjusted by electric fields, which demonstrates roles of the carrier movement across interface and suggests the importance of injected carriers’ staying. All observations suggest that th…
A novel and versatile nonhydrolytic approach is developed for the synthesis of ligand-passivated CeO 2−δ and CeOCl nanocrystals soluble in nonpolar organic solvents based on the condensation of cerium alkoxides with cerium halides. The alkyl group on the metal alkoxides and the specific halide used in the synthesis ar…
Hybrid-structured surfaces consisting of microgrooves and nanocrystals have been modified with a self-assembled monolayer (CF3(CF)7CH2CH2SiCl3) via low-cost, mass-production and highly integrated nano/microfabrication. The microgrooves decorated with nanocrystals were patterned and fabricated on a silicon substrate to…