Materials Literature
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Poly( l -lactide) (PLLA) is one of the most promising biobased and biodegradable polymers. However, the lack of toughness restricts its application considerably. In the present study, PLLA was successfully toughened by blending with a poly(lactic acid) based poly(ester-urethane) (PEU), which contained poly(butylene su…
The thermal transformations of metallopolymers and their most typical precursors, resulting in the formation of nanocomposite materials, are considered. The attention is focused on the methodology of thermolysis including kinetic approaches. The most important chemical reactions taking place during this process conduc…
Pd nanoparticles, evaporated onto highly oriented pyrolytic graphite (HOPG) surfaces, were studied using in situ X-ray photoelectron spectroscopy (XPS). The evolutions of both core level and valence band spectra were followed as a function of Pd deposition. Both Pd3d 5/2 and Pd3p 3/2 core level spectra were separated…
We investigated the Fe-site substitution effect on the structural and magnetic properties of the infinite layer iron oxide Sr(Fe(1-x)M(x))O(2) (M = Co, Mn) using synchrotron X-ray diffraction, neutron diffraction, and (57)Fe Mössbauer spectroscopy. Both systems have a similar solubility limit of x ≈ 0.3, retaining the…
The objective of the present work is to propose a new seismic isolation device based on superelastic material components manufactured using shape memory alloys. Seismic isolation is one of the most effective options for the passive protection of structures. Shape memory alloys (SMAs) are characterized by unique mechan…
This paper is the first report of electrospinning neat polyisobutylene-based thermoplastic elastomers. Two generations of these materials are investigated: a linear poly(styrene-b-isobutylene-b-styrene) (L_SIBS) triblock copolymer and a dendritic poly(isobutylene-b-p-methylstyrene) (D_IB-MS), also a candidate for biom…
Nanocrystalline ferrites MnxZn1−xFe2O4 (x = 0.0–1.0) were prepared by the combustion method without sequential heat treatment. As-synthesized MnxZn1−xFe2O4 ferrites, characterized by x-ray diffraction (XRD), have demonstrated a highly pure phase of spinel structure. From the analysis of XRD data with Scherrer’s formul…
Auger processes in colloidal semiconductor nanocrystals have been scrutinized extensively in recent years. Whether involving electron-exciton, hole-exciton, or exciton-exciton interactions, such Auger processes are generally fast and hence have been considered prominent candidates for interpreting fast processes relev…
The electronic properties of free-standing semiconductor nanocrystals can be tuned by diffusing metallic impurities into them.
In this study, we prepared graphene by using the modified Hummers-Offeman method and then introduced the metals (Pt, Pd and Fe) for dispersion on the surface of the graphene for synthesis of metal-graphene composites. The characterization of the prepared graphene and metal-graphene composites was performed by X-ray di…
Density functional theory (DFT) and coupled cluster theory (CCSD(T)) were used to study the group 6 metal (M = Cr, Mo, W) hydroxides: MO 3− m (OH) 2 m ( m = 1−3), M 2 O 6− m (OH) 2 m ( m = 1−5), M 3 O 9− m (OH) 2 m ( m = 1, 2), and M 4 O 11 (OH) 2 . The calculations were done up to the complete basis set (CBS) limit f…
CuInSe₂ (CIS) nanowires were synthesized by solution-liquid-solid (SLS) growth in a high boiling solvent using bismuth nanocrystals as seeds. The nanowires tended to be slightly deficient in In and exhibited either cubic or hexagonal crystal structure, depending on the synthesis conditions. The hexagonal structure, wh…
Nanoscale materials including nanotubes, nanowires, ceramics, quantum dots etc. can be produced from a huge variety of substances. Responsible development of new materials requires that risks to health and the environment associated with the development, production, use and disposal of these materials are fully addres…
ABSTRACT Thymol displays strong activity against microorganisms that are of interest in clinical field and in food industry. Pullulan can form homogeneous films, which is an important property for its use as a coating material in the food industry. The present study determining the effect of thymol incorporated into a…
Abstract Silica-supported Pd nanoparticles (Pd/SiO2) with dimethyl sulfoxide (DMSO) show excellent catalytic activity and selectivity for the semihydrogenation of alkynes. Small amounts of DMSO drastically suppress the overhydrogenation and isomerization of alkenes. This catalyst system is also applicable to both inte…
The Eu 2+ ‐doped NaBaPO 4 phosphor was prepared by high‐temperature solid‐state reaction. The photoluminescence excitation and emission spectra and the luminescence quantum efficiency of Eu 2+ ions were investigated. The dependence of luminescence intensity on temperatures and the temperature‐dependent decay times of…
Oxidative stress is known to play important roles in engineered nanomaterial-induced cellular toxicity. However, the proteins and signaling pathways associated with the engineered nanomaterial-mediated oxidative stress and toxicity are largely unknown. To identify these toxicity pathways and networks that are associat…
PhzE utilizes chorismate and glutamine to synthesize 2-amino-2-desoxyisochorismate (ADIC) in the first step of phenazine biosynthesis. The PhzE monomer contains both a chorismate-converting menaquinone, siderophore, tryptophan biosynthesis (MST) and a type 1 glutamine amidotransferase (GATase1) domain connected by a 4…
The optical properties and microstructure are evaluated for a transparent cubic (8 mol% yttria‐stabilized) zirconia ( c ‐YSZ) prepared by high‐pressure spark plasma sintering. Oxygen vacancies and residual pores are primary defects in the present transparent c ‐YSZ, and the combination influence of these two defects d…
The influence of poly(vinyl alcohol) (PVA) in the synthesis of SBA-15 was investigated. It was found that, by the addition of PVA, the surface area and porosity of SBA-15 is increased, while the structure and size of the mesopores remain unchanged. Nitrogen sorption measurements indicate that PVA introduces additional…