Materials Literature
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Polyol derived from soybean oil was used as a natural source preparation to create an environmentally friendly polyurethane foam. In order to stiffen these foams, wood fibers were added to provide reinforcement at low cost, while preserving the environmental friendly nature of the material. Mixing is a crucial step in…
The relaxor-like dynamics of the cubic-tetragonal ferroelectric phase transition was studied by Brillouin and Raman scattering in K(Ta1−xNbx)O3 (KTN) crystals with x = 0.40 (KTN40). The local symmetry breaking by the polar nanoregions (PNRs) was observed in a paraelectric phase by Raman scattering on the A1(z) mode of…
Summary The thermal degradation of epoxy resin/carbon fiber composites has been performed in ISO 5660 standard cone calorimeter using a piloted ignition. Two kinds of composites that differ by their volume fractions in carbon fiber (56 and 59 vol.%) were tested in this study. The cone calorimeter irradiance level was…
In the present report, bare CdO and CdO/MnO 2 core/shell nanostructures of various cores and different shell sizes were synthesized using co‐precipitation method. The phase, size, shape and structural details of the bare CdO and CdO/MnO 2 nanostructures were investigated by X‐ray diffraction, transmission electron mic…
TPD and DRIFTS study to investigate dual role of H <sub>2</sub> to promote and eliminate surface NO <sub>x</sub> species over Ag/Al <sub>2</sub> O <sub>3</sub> catalyst.
We investigated the electronic properties of the molecular magnetic nanotoruses [Fe III 10 Ln III 10 (Me‐tea) 10 (Me‐teaH) 10 (NO 3 ) 10 ], examining the dependence on the lanthanide (Ln) of both the intra and intermolecular electronic channels. Using femtosecond absorption spectroscopy we show that the intramolecular…
Tubular scaffolds with controllable fiber orientations are fabricated by electrospinning with a conductive rotating drum in the presence of a parallel or orthogonal conductive wire. A higher rotational speed of the drum results in thinner fibers and a more aligned fibrous structure. The fiber orientation can be furthe…
This chapter attempts to summarize the major part of existing information from the past 20 years dedicated to the application of gold-based catalysts in the water gas shift reaction. It is organized in five-year periods in which the most relevant aspects concerning the gold-based materials are described. Within the gr…
We developed a Bayesian method to extract macromolecular structure information from sparse single-molecule x-ray free-electron laser diffraction images. The method addresses two possible scenarios. First, using a "seed" structural model, the molecular orientation is determined for each of the provided diffraction imag…
Hydroxyapatite/poly(vinyl alcohol) (Hap/PVA) composites have been proposed as a promising biomaterial for use in articular cartilage repair. In this study, HAp/PVA composite gels reinforced with cellulose nanocrystals (CNC) were prepared using the freeze/thaw method. The influence of CNC as a reinforcement on the stru…
meso-Cyano boron-pyridyl-isoindoline dyes with asymmetrical structures were synthesized through a facile two-step reaction. Broad envelopes of intense vibrational bands were observed for the main spectral bands in the absorption and emission spectra. Moderate fluorescence quantum yields were obtained in solution, with…
The nanostructure can collapse due to elasto-capillary interactions. On the basis of free energy analysis for three cases, the contact between double beams can be induced by equilibrium contact or instability. In the former mechanism, the beam contact can be achieved by a gradual increase of deformation with increasin…
ABSTRACT The crystallization behavior and isothermal crystallization kinetics of neat poly( l ‐lactic acid) (PLLA) and PLLA blended with ionic liquid (IL), 1‐butyl‐3‐methylimidazolium dibutylphosphate, were researched by differential scanning calorimetry (DSC), polarizing optical microscopy (POM), and wide angle X‐ray…
The analysis of the steady-state and transient photoluminescence (PL) of PbS quantum dots (QDs) of diameter in the 3.2–6.9 nm range in porous matrixes at temperatures 77–300 K shows that QDs of different sizes possess entirely different temperature dependencies of their PL properties. The data indicates the presence o…
The crystal structures, phase transition, and thermal expansion behaviors of solid solutions of Sc(2-x)Fe(x)Mo3O12 (0 ≤ x ≤ 2) have been examined using X-ray diffraction (XRD), neutron powder diffraction (NPD), and differential scanning calorimetry (DSC). At room temperature, samples crystallize in a single orthorhomb…
Detection of surface charges has various applications in medicine, electronics, biotechnology, etc. The source of surface charge induction may range from simple charge-polarized molecules like water to complicated proteins. It was recently discovered that surface charge accumulation can alter the temperature at which…
Eu2+ doped and Eu2+, Ce3+ co-doped LiSi2N3 phosphors were successfully prepared by gas-pressed sintering in this study. The dominant excitation band of LiSi2N3:Eu2+ was found at about 355 nm and exhibited a broad-band yellow emission centered at 592 nm instead of the early reports of 310 nm and 580 nm, respectively. T…
Silicon carbide nanoparticle (SiC NPs)/polyimide (PI) composite films were prepared by a solution blending process. To obtain carbon films, pure PI and SiC/PI composite films were carbonized at 1000 °C under a N2 atmosphere and graphitized at 2300 °C for 2 h under an Ar atmosphere. The catalytic behaviour of SiC NPs i…
A new high strain rate forming process for titanium alloys is presented and named High Pressure Pneumatic Forming (HPPF), which might be applicable to form certain tubular components with irregular cross sections with high efficiency, both with respect to energy cost and time consumption. HPPF experiments were perform…
The surface of nanoparticles governs the overall properties of the nanoparticles because nanoparticles have a large surface-to-volume ratio. Charge, crystallinity, and chemical properties (such as hydrophilicity) of surfaces determine the stability, structure, and reactivity of nanoparticles. In this respect, it is es…