Materials Literature
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Biodegradable polyphosphazenes were categorized as osteoinductive materials because of their phosphorus-containing feature; however, they were less supportive in cell attachment and proliferation at earlier points in comparison with biodegradable aliphatic polyesters. Therefore, mussel-inspired surface modification of…
The Eu 2+ , M ‐codoped( M = Ce 3+ , Mn 2+ ) phosphor powders were prepared by a solid‐state reaction. The addition of Ce 3+ in the Eu 2+ sites in partially nitridated bredigite‐structure phosphor( CMSN ) remarkably enhances the luminescent intensity by ~180% through sensitized luminescence. Dual band emission was obse…
Polyhydroxyalkanoate (PHA)-producing Bacillus strains express class IV PHA synthase, which is composed of the subunits PhaR and PhaC. Recombinant Escherichia coli expressing PHA synthase from Bacillus cereus strain YB-4 (PhaRCYB-4) showed an unusual reduction of the molecular weight of PHA produced during the stationa…
In this paper, gelation phenomenon during the crystallization process of cefotaxime sodium (CTX) is systematically studied. First, the gelation process is monitored using a nanoparticle size analyzer; the gel and xerogel are studied by different characterization tools to speculate the gelation mechanism. It is found t…
Pb(Mg 1/3 Nb 2/3 )O 3 –PbTiO 3 is used as a model system of perovskite solid solutions with very high piezoelectric response at tailored morphotropic phase boundaries to demonstrate the processing of textured ceramics by ceramic‐only technology. A novel homogeneous templated grain growth approach that uses conventiona…
Sol–gel precursors to HfB 2 and ZrB 2 are processed by high‐energy ultrasonication of Hf , Zr oxychloride hydrates, triethyl borate, and phenolic resin to form precipitate‐free sols that turn into stable gels with no catalyst addition. Both precursor concentration and structure (a sol or a gel) are found to influence…
In the present work, the propagation of longitudinal stress waves is investigated with a strain gradient elasticity theory given by Lam et al. In principle, the analysis of wave motion is based on the Love rod model including the lateral deformation effects, but in the same time is also taken into account the shear st…
The influence of incident angles of energetic carbon atoms (0–60°) on the structure and properties of diamond-like carbon (DLC) films was investigated by the molecular dynamics simulation using a Tersoff interatomic potential. The present simulation revealed that as the incident angles increased from 0 to 60°, the sur…
Alkali lime silicate glasses containing 5 wt% of CoO were investigated by Co K‐edge XANES and EXAFS and optical absorption spectroscopy. Our results reveal the presence of tetrahedral Co 2+ connected with the glass network, with a IV Co–O–Si angle of 134°. Changing the alkali from K + to Na + induces an increase of th…
In this paper, the effect of the temperature change on the vibration frequency of mono-layer graphene sheet embedded in an elastic medium are studied. Using the nonlocal elasticity theory, the governing equations are derived for single-layered graphene sheets. Using Levy and Navier solutions, analytical frequency equa…
Using electrochemical charge injection, the fluorescence lifetimes of negatively charged core/shell CdTe/CdSe QDs are measured as a function of core size and shell thickness. It is found that the ensemble negative trion lifetimes reach a maximum (∼4.5 ns) for an intermediate shell thickness. This leads to the smallest…
A novel aluminum magnesium oxynitride transparent ceramic with the chemical formula Mg 0.27 Al 2.58 O 3.73 N 0.27 was firstly prepared by pressureless sintering of fine single‐phase powders at 1875°C for 24 h in nitrogen atmosphere. The ceramic was fully dense with the average grain size of 57.5 μm. The sample showed…
The variety of interactions that can occur at the silica/aqueous interface makes silica nanoparticles (SiNPs) attractive materials for technological applications. Despite their importance, interfacial interactions are not fully understood. In this contribution, we investigate the effect of (1) particle size and (2) su…
The composition and structure of the film formed on Mg corroding in 0.01 M NaCl prior to any visible localized breakdown event was examined using a transmission electron microscopy (TEM). Focused ion beam (FIB) milling was used to prepare electron transparent lamellae of the film in cross-section. The TEM examination…
Dy 3+ ‐activated Na 3 YSi 2 O 7 phosphors have been prepared via a solid‐state reaction technique and may be used as a component of white light‐emitting diodes. X ‐ray diffraction analysis demonstrates the single‐phase formation and the substitution of activator ions for Na 3 YSi 2 O 7 : Dy 3+ materials. The emission…
The purpose with the present investigation has been to support and explain the experimental observation made regarding the enhancing effect by N doping on especially the diamond (100)-2 × 1 growth rate. Within the present study, also the commonly observed diamond (111) and (110) surfaces were included, all assumed to…
A microstructure-dependent nonlinear third-order beam theory which accounts for through-thickness power-law variation of a two-constituent material is developed using Hamilton's principle. The formulation is based on a modified couple stress theory, power-law variation of the material, and the von Kármán nonlinear str…
The non-isothermal thermogravimetric methods have been used extensively for the determination of kinetic parameters in polymers. The poly (ether ketones) are used as matrix in advanced high performance composites due its high thermal stability, excellent environmental performance and superior mechanical properties. In…
Composites of styrene-butadiene-styrene triblock copolymer (SBS) matrix with curauá fiber and/or a nanoparticulate mineral (montmorillonite clay - MMT) used as reinforcing agents were prepared by melt-mixing. The influence of clay addition on properties like tensile and tear strength, rebound resilience, flex fatigue…
Many researchers have been studying coconut fibers due to its being a natural and renewable source. Moreover, coconut waste is discarded in landfills, bringing environmental problems because this material, although natural, takes time to be degraded. The use of natural fibers such as coconut fibers has become industri…