Materials Literature
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We present a simple and accurate model for the reflectance simulation of black silicon (BSi) based on the finite element method (FEM). Normalized-root-mean-square error (NRMSE) with experimental measurements below 0.25% has been obtained for wavelength range between 450 and 950 nm. The model is made of a four basic sh…
We performed magneto-optical (MO) measurements on FeTe 0.5 Se 0.5 thin films grown on LaAlO 3 (LAO) and Yttria-stabilized zirconia (YSZ) single-crystalline substrates. These thin films show superconducting transition temperature T c ∼19 K, 4 K higher than the bulk sample. Typical roof-top patterns can be observed in t…
A shape-memory alloy (SMA) is expected to be applied as intelligent or smart material since it shows the functional characteristics of the shape memory effect and superelasticity. Most SMA elements, with these characteristics, perform cyclic motions. In these cases, the fatigue property of SMA is one of the most impor…
The liquid crystalline (LC) nature of alkyloxybenzoic acids is preserved after adding of any mesogenic or non-mesogenic compound through hydrogen bonding. However, this noncovalent interaction provokes a sizable effect on the physical properties as, e. g. melting point and mesomorphic states. In the present work we in…
The successful osseointegration of a bone implant is greatly dependent on its ability to support cellular adhesion and functions. Deposition of thin composite coatings onto the implant surface is a promising approach to improve interactions with cells without compromising implant bulk properties. In this work, we have…
Pt and Ag nanoparticles (NPs) were synthesized by eco-friendly room-temperature chemical reduction routes based on trisodium citrate and L-ascorbic acid (for Pt NPs) and on gelatin and trisodium citrate (for Ag NPs). The as-prepared NPs were characterized by UV-visible absorption spectroscopy and transmission electron…
Temperature is one of the important factors that affect to the coefficient of dielectric loss. Currently electronics is actively developing in the gigahertz frequency range. The frequency growth leads to the increasing of dielectric self-heating in the microwave electric field. Heating of dielectrics might be caused a…
The effect of 20 MeV electron irradiation on the vibrational properties of homogeneous SiO x films and SiO x films containing amorphous or crystalline Si nanoparticles is studied. Layers with x = 1.15 and 1.3 and two different thicknesses, 200 nm and 1000 nm, were deposited on crystalline silicon substrates and anneal…
This article reports unique pattern formation processes and mechanisms via crystallization of materials under external flow fields as one of the general problems of open nonequilibrium phenomena in statistical physics. The external fields effectively reduce step-by-step the exceedingly large free energy barriers assoc…
Although Mn impurities are promising to bring Si, the most widespread semiconductor employed in electronic devices, into the spintronics realm, few theoretical works exist that calculate the charge transition levels of Mn in Si. Among these works, none of them makes use of gap correction methods. To fill this void, we…
Binary films composed of azobenzene-based amorphous molecular materials and <italic>p</italic> -toluene sulfonic acid were found to exhibit drastic and reversible colour change when we breathed onto their films.
Epitaxial growth of graphene on transition metal surfaces has been proposed as one of the most promising methods for large-scale preparation of high-quality graphene. However, the presence of the substrate could significantly affect the intrinsic electronic structure of graphene and intercalation of metals is an estab…
Conducting polymer-based ternary nanocomposites were synthesized by an in situ polymerization of aniline/pyrrole monomer in the presence of functionalized multi-walled carbon nanotubes (CNTs) using...
Graphene layers were grown by chemical vapour deposition (CVD) on Si wafers covered by a SiO 2 substrate layer and a Ni interlayer, and on copper and nickel foil. The obtained graphene layers were characterized by Raman spectroscopy. The films grown on SiO 2 /Ni substrate and Ni foil comprise mainly multilayer defect-…
We use para-amino benzoic acid terminated carbon black (CB) as a model particulate material to study the effect of salt-modulated attractive interactions on phase behavior and steady shear stresses in suspensions and particle-stabilized emulsions. Surprisingly, the suspension displayed a yield stress at a CB volume fr…
Polymers confined at the nanometer scale often exhibit a distinct structural and dynamical response compared to their bulk counterparts. In this study, we observe that the confinement of poly(ethylene oxide) (PEO) in the nanopores of carbon nanoparticles (CNPs) leads to the suppression of crystallization and to a sign…
Reflection of light measured in a polarimetric, scatterometric and spectroscopic way allows the measurement of structures in a broad size range from large (meter) scales like photovoltaic panels down to small (nanometer) scales like nanocrystals. Optical metrology continues to be improved to measure those materials wi…
We consider the Landau−de Gennes variational problem on a bounded, two dimensional domain, subject to Dirichlet smooth boundary conditions. We prove that minimizers are maximally biaxial near the singularities, that is, their biaxiality parameter reaches the maximum value 1. Moreover, we discuss the convergence of min…
ABSTRACT A water‐soluble amphiphilic derivative of chitosan oligosaccharide (COS) modified with linoleic acid (LA)‐grafted COS (LCOS) has been synthesized in the ionic liquid 1‐butyl‐3‐methylimidazolium acetate ([BMIM]Ac). The effects of the ionic liquid on the degree of substitution (DS), surface activity, and self‐a…
High-resolution X-ray and neutron powder diffraction are used to reveal details of the spin-reorientation transition in the layered oxide pnictide CeMnAsO. Above 38 K, the localized moments on Mn(2+) are antiferromagnetically ordered in a checkerboard fashion within the antifluorite-type MnAs planes and are oriented p…