Materials Literature
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Abstract Low softening point temperature glassy frit, reinforcing silica, wollastonite and dicumyl peroxide were incorporated into ethylene-propylene-diene (EPDM) rubber matrix in different amounts in order to obtain ceramifiable composites. Kinetics of vulcanization of the mixes was measured. Mechanical properties, m…
We present a rapid, simple, and efficient strategy for high yield synthesis of monodisperse, quasi-spherical Au nanocrystals (Au NCs) via a one-step seeded method at room temperature. Au NCs ranging from 17 nm to 325 nm can be synthesized by adjusting the amount of the Au seeds at a fixed amount of HAuCl4. It is found…
We study the spin current injected by spin pumping into single layer graphene and the two-dimensional electron gas (2DEG) with ferromagnetic contacts using scattering theory. The spin currents pumped into graphene are very distinct from that into the 2DEG since they are affected by Klein tunneling.
To synthesize silver nanoparticles by using Azadirachta indica (A. indica) and Elephantopus scaber (E. scaber) leaf extract as reducing and stabilizing agent and to check the efficacy of silver nanoparticles towards mortality of mosquito larval and pupal stages of Culex quinquefasciatus (Cx. quinquefasciatus). The sil…
atomic layers, and Ov in the subsurface SrO atomic layers. Counter-intuitively, for the SrO terminated surface the most stable site of Ov is in the first subsurface atomic layer. The Au metal in the Au/STO heterostructure significantly promotes the formation of Ov at and near the interface and thermodynamically promot…
This chapter is focused on functional nanocomposites based on the use of the microfibrous clays sepiolite and palygorskite as efficient fillers for diverse types of polymer matrices, from typical thermoplastics to biopolymers. The main features that govern the interaction between the silicates and the polymer matrix a…
BACKGROUND: Carbon nanotubes (CNT) can interact with the biological environment, which could participate in their associated toxicity. We recently demonstrated that pH is an important player of CNT fate inside macrophages. We wanted to further characterize such process, and therefore designed a study dedicated to deci…
In both optics and nuclear magnetic resonance, two-dimensional (2D) spectroscopy has been widely used to study correlations in ensembles of molecules. The authors articulate a scheme for universal 2D quantum sensing based on dynamical decoupling, to measure nuclear spin correlations, and therefore structural features,…
A hybrid composite of NaY zeolite and amine modified multi-walled carbon nanotube (MWCNT) has been synthesized by hydrothermal method. The obtained NaY/CNT composite (NC composite) was characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR), scanning electron microscopy (SEM), and BET analysis. CO…
ABSTRACT The polypentapeptide of elastin, poly(GVGVP) has shown remarkable properties and have great potential for biomedical applications. To explore its applications further, the miscibility behaviors of poly(vinyl alcohol) (PVA)/poly(GVGVP) blends have been explored in a very broad composition range. The miscibilit…
The chemical oxidative polymerization of 2-aminothiazole (AT) was studied in aqueous solution using copper chloride (CuCl₂) as an oxidant. The effect of varying the reaction temperature, reaction time and oxidant/monomer molar ratio on the polymer yield was investigated. The resulting poly(2-aminothiazole)s (PATs) wer…
Aqueous solutions of sodium hydroxide (NaOH) and urea are a known and versatile solvent for cellulose. The dissolution of cellulose occurs at subambient temperatures through the formation of a cellulose-NaOH-urea “inclusion complex” (IC). NaOH and urea form a hydrate layer around the cellulose chains preventing chain…
In this work, (E)-N-(4-Fluoro-3-Phenoxybenzylidene)-substituted benzenamines (1-6) have been synthesized and characterized by IR, 1H and 13C NMR spectral studies. Density functional theory (DFT) has been used to optimize geometrical parameters, atomic charges, vibrational wavenumbers and intensity of vibrational bands…
A review on elasto-dynamics of quasicrystals (QCs) and their applications based on mathematical elasticity is given. In this study, recent studies on elasto-dynamics of QCs are reviewed, in which the focus of the problem lies in the role of phason variables and the coupling effect between phonons and phasons in the dy…
Tubule halloysite is a promising nanomaterial for functional clay composites. Not only does the addition of halloysite improve the mechanical properties of the composites, but the clay also has a hollow lumen that allows for functionalization of the matrix by the extended release and adsorption of practical molecules.…
The symmetry of the room-temperature (RT) structure of title compounds La 2– x Sr x CoTiO 6−δ changes with x, from P 2 1 / n (0 ≤ x ≤ 0.2) to Pnma (0.3 ≤ x ≤ 0.5) and to R 3 ̅c (0.6 ≤ x ≤ 1). For x = 1 the three pseudocubic cell parameters become very close suggesting a transition to a cubic structure for higher Sr co…
ABSTRACT The effect of annealing on the microstructure and melting behavior of a solution‐cast polylactide (PLA) stereocomplex (sc) was systematically investigated by differential scanning calorimetry and small‐angle X‐ray scattering. A preorder state, an intermediate form between the amorphous and crystalline states,…
This manuscript reports on the effects of the luminescence properties of Er3+ on Al2O3-ZrO2 powder synthesized by the conventional solid-state method. The best conditions found for the calcinations were 1500 °C and 4 h. The structural dependence of the luminescence on Er3+:Al2O3-ZrO2 is associated with phase transform…
Raman and IR investigations indicated the presence of reduced graphene oxide (rGO)-like residues on ceria nanoparticles after solvothermal treatment in ethanol. The appearance of such structures is closely related to cerium tert -butoxide as precursor and ethanol as solvothermal solvent. The rGO-like residues improve…
Polyesters are known biodegradable materials that are frequently used for biomedical applications that require biocompatibility. Their synthesis usually requires transition metal catalysts, which may become a source of contamination. In addition, using such compounds translates to extensive purification procedures, wh…