Materials Literature
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FeCo nanoparticles (NPs) are promising soft magnetic nanomaterials for use in many applications; however, the present problem is how to prevent oxidation. The most powerful substance for protection of FeCo NPs is graphitic carbon (GC). Here, we present a novel and simple technique for the large-scale synthesis of GC-c…
Phase-change memory (PCM) relies not only on phase transitions between the two structures of the chalcogenide materials but also on electronic switching in the amorphous material between off and on conductive states andvice versa. Transient effects associated to both transitions, like the delay time for threshold swit…
Image contrasts of Si-based semiconducting materials have been investigated by using the latest scanning electron microscope with various detectors under a range of experimental conditions. Under a very low accelerating voltage (500 V), we obtained a good image contrast between crystalline SiGe whiskers and the amorph…
Bismuth ferrite, BiFeO 3 (BFO), was synthesized in a hydrothermal process without the introduction of any metal cations, other than Fe 3+ and Bi 3+ . For this purpose, a strong organic hydroxide was used for the precipitation of the bismuth and iron salts. With the aim to study the molar range for the production of BF…
Abstract Two novel Schiff base ligands of 2-amino-3-cyano-1,5-diphenylpyrrole and salicylaldehyde (HL1) or 2- hydroxy1-naphthylaldehyde (HL2) and their copper(II) complexes have been synthesized and characterized by elemental analyses, spectral (UV-Vis, IR, EPR, Mass (for ligands)), thermal (DTA-TGA) methods, magnetic…
Die ferromagnetische Wechselwirkung in einem Fe4Dy4-Einzelmolekülmagnet wurde mit einer Kombination aus magnetischen Suszeptibilitätsmessungen (siehe Diagramm; der Einschub zeigt die Kernstruktur des Clusters) und 57Fe-Mößbauer-Spektroskopie untersucht.
In unstable emulsion systems, the determination of concentrations is a challenge. The use of standard methods like GC, HPLC, or titration is highly inaccurate and makes the acquisition of precise data for these systems complex. In addition, the handicap of high viscosity often comes into play. To overcome these fundam…
Binary chalcogenide As-Se glasses and their thin films are important for optics, computers, materials science and technological applications. To increase understanding of the properties of thin films fabricated by plasma deposition techniques, more information concerning the physics of plasma plume is needed. In this…
We report here the field and modal characteristics in photonic crystal (PC) Fano reflectors. Due to the tight field confinement and the compact reflector size, the cavity modes are highly localized and confined inside the single layer Fano reflectors, with the energy penetration depth of only 100nm for a 340 nm thick…
The absorption spectra of dianionic tetrocyanoethylene and dicationic tetrathiafulvalene dimers have been studied theoretically with the time-dependent density functional theory and the recently proposed Coulomb-attenuated model. The nature of the excited states was further explored by means of the two-dimensional (2D…
peer reviewed
Abstract Novel luminescent electrospun (ES) polymer nanofibers were successfully prepared via a two‐fluid spinneret for thermo‐tunable colorimetric sensor applications. Binary blends of conjugated rod–coil poly[2,7‐(9,9‐dihexylfluorene)]‐ block ‐poly( N ‐isopropylacrylamide) (PF‐ b ‐PNIPAAm)/poly(methyl methacrylate)…
The charge-transfer and spectral properties of two octithiophenes, namely 4',4''',3'(v),3(v)'-tetra(octylsulfanyl)-2,2':5',2'':5'',2''':5''',2'(v):5'(v),2(v):5(v),2(v)':5(v)',2(v)''-octithiophene and 4,3'',4(v),4(v)''-tetrabromo-4',4''',3'(v),3(v)'-tetra[(R)-2-methylbutylsulfanyl]-2,2':5',2'':5'',2''':5''',2'(v):5'(v)…
Calcium tartrate tetrahydrate and α-glycine single crystals grown in agarose hydrogels incorporate agarose polymer networks, resulting in polymer/single-crystal composites.
We study a nanomagnet that exhibits spin tunneling and is free to rotate about its anisotropy axis. Hamiltonian of a rotated two-state spin system is derived and exact low-energy eigenstates of the nanomagnet that are superpositions of spin and rotational states are obtained. We show that parameter $\ensuremath{\alpha…
Low-temperature solid oxide fuel cell (SOFC, 300–600°C) technology fueled by methanol possessing significant importance and application in polygenerations has been developed. Thermodynamic analysis of methanol gas-phase compositions and carbon formation indicates that direct operation on methanol between 450 and 600°C…
We present a steady-state thermodynamic model of a hybrid solid oxide fuel cell (SOFC)–gas turbine (GT) cycle developed using a commercial process simulation software, AspenPlus™. The hybrid cycle model incorporates a zero-dimensional macro-level SOFC model. A parametric study was carried out using the developed model…
The influence of surface vibrations on the intensity of sonochemiluminescence (SCL) produced by pulsed ultrasound with a frequency of 151 kHz is investigated through optical measurement of the vibration amplitude. Pulsed ultrasound inhibits the generation of large degassing bubbles that scatter sound waves, thereby re…
Encoding by encapsulation: A polymeric shell fabrication approach combines biomolecule encapsulation with encoding. Striated polymeric shells, fabricated through an inwards diffusion of poly(allylamine) into the matrices of agarose microbeads, serves to encapsulate the biomolecules within the microcapsule. Encoding is…
We compare results from molecular dynamics simulations with those from phase-field modeling concerning the solidification and melting kinetics of a planar ${[{\text{Ni}}_{c}{\text{Zr}}_{1\ensuremath{-}c}]}_{\text{liquid}}{\text{-Zr}}_{\text{crystal}}$ interface. Our study is an illustration that both approaches may pr…