Materials Literature
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The use of autogenous grafts is still considered in bone regeneration surgeries. However, the bone cell viability of such grafts after being harvested from donor sites remains a matter of debate. The aim of the present study is to evaluate particulated and block bone cell viability, in terms of presence or absence of…
Abstract Random copolymers of ethylene and propylene are usually miscible with the corresponding unsaturated terpolymer (EPDM). Vulcanization of these blends yields networks in which only the EPDM is cross-linked. Despite chemical modification of the EPDM by its reaction with sulfur, there is no phase-separation evide…
Abstract A versatile triple‐shape material based on the two crystallizable segments poly( ω –pentadecalactone) and poly( ε ‐caprolactone) was synthesized showing triple‐shape capability after application of the typical two‐step triple‐shape creation procedure at elevated temperatures (TSCP) as well as a one‐step progr…
This work presents a multiscale photoelectrochemical characterization of oxide layers, and aims mainly at introducing the mesoscopic scale (ca 30 µm). For the first time, photocurrent energy spectra could be recorded on individual ferritic and austenitic grains of a unique 2205 duplex stainless steel sample oxidized f…
Observation of the stress and strain in materials steel, brass and anneal is done by testing to determine the tensile modulus of elasticity of the material. The results showed that the modulus of elasticity of the material brass is smaller than the brass alloy steel and steel materials, caused by the formation of the…
Two kinds of amino groups were employed to functionalize bimodal mesoporous silicas and related drug carriers were prepared. The characterization results of XRD, N2 adsorption and desorption, FT-IR and TG all confirmed the structural integrity of the bimodal mesopore architecture after introduction treatment of functi…
A new asymmetric biphenyl dianhydride, 2-o-tert-butylphenoxy-4,4′,5,5′-biphenyltetracarboxylic dianhydride, was readily synthesized via a four-step route. The key intermediate, 2-nitro-bis(N-methylphthalimide) (2), was synthesized at low temperature (around 15°C), with a yield of over 90%, which enhances the molecular…
At the millimeter scale, the motions or force out puts generated by conventional piezoelectric, magnetostrictive, photostrictive, or electromagnetic actuators are very limited. Here, we report a piezoelectric ultrasonic microactuator (size: 1.5 × 1.5 × 5 mm, weight: 0.1 g) made of PIN-PMN-PT single crystal. The actuat…
Abstract Although Wilhelmy balance measurements have been reported to yield undefined values of the type cos θ > 1, this phenomenon often goes unnoticed because commercial instruments fail to report this error, listing a contact angle of zero instead. On rough superhydrophilic surfaces such “undefined” values appea…
Experiments on the irradiation of silver nitrate solutions in various liquids by the nanosecond electron beam of a URT-0.5 (0.5 MeV, 50 ns, 1 kW) accelerator facilitated the development of technology for producing silver nanopowders. The powder yield and particle size as a function of the irradiation mode has been est…
We present a Monte Carlo simulator for RF graphene FETs including the dominant scattering mechanisms and a simple model for band-to-band tunneling. We found that in state-of-the-art devices scattering is relevant and degrades the cut-off frequency compared to the predictions of ballistic models.
We report the magnetic field dependence of resistivity (ρ) and specific heat (C) for the non-superconducting PrFeAsO compound. Our study shows a hitherto unobserved anomaly at TSR in the resistivity and specific heat data, which arises as a result of the interplay of antiferromagnetic (AFM) Pr and Fe sublattices. Belo…
The pH-dependent properties of carbon dots (CDs), decorated with surface carboxylic acid functional groups, are described. Absorption, fluorescence emission measurements were used to study the reversible pH-dependent spectral response. The pH-dependent emissions of CDs demonstrate a strong dependence on the excitation…
Electrospinning provides a viable method to produce both single fibers and mats of nonwoven fibers. For a nonwoven mat, fusing of the fibers at intersections produces an integrated structure. The ability to spin fibrous mats of nanofibers with and without fusing between the fibers is demonstrated using poly(ethylene o…
Abstract Compositions of binary Al‐TM (TM=Cr to Ni) quasicrystals are interpreted with a unified cluster formula [icosahedron](glue) 1 using the newly developed cluster–resonance model and the e/a formalism. The icosahedra are chosen from the corresponding approximants by considering large radial atomic density, high…
XPS data have been obtained from silver oxide (Ag2O) thin films which were prepared by the anodic oxidation of sputter cleaned silver metal in alkaline solution (1M NaOH). The electrochemical oxidation was performed under a protecting noble gas atmosphere in a separate chamber flanged to the UHV spectrometer, so that…
Two aerosol synthesis methods of carbon nanotubes are considered. The possibility of separation of individual single-walled nanotubes from the bundle in the gas phase and control of their parameters with the help of etching agents is shown. The advantage of the aerosol synthesis methods of nanotubes both for variation…
Chemical functionalized graphene (f-G) was obtained by the reaction of the residual epoxide and carboxyl functional groups on the hydrazine-reduced graphene (G) sheets with hydroquinone. The efficacy of the functionalization reaction of graphene was confirmed by X-ray photoelectron spectroscopy and thermogravimetric a…
m and with established mineral content in the individual fibers. The X-ray diffraction showed the crystalline feature of the obtained nano-compounds. The thermo gravimetric analysis was used to differentiate between the collagen and mineral parts of obtained product. Overall, the results generously indicated productio…
Aqueous dispersion of Shungite carbon (ShC) condensation is followed by aggregation of carbon nanoparticles and further net formation. Data obtained by adsorption methods that characterized changes in porosity of natural shungites when transformed into aqueous dispersion and precipitated, were investigated. Pore size…