Materials Literature
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The effect of laser wavelength on single-wall carbon nanotubes synthesis yield and their properties was studied. A double-pulse Nd:YAG laser, working at a wavelength of 355 or 1064 nm, was used for carbon nanotubes production. The synthesized carbon nanotubes (CNTs) were investigated using the SEM/STEM microscopy and…
We fabricated NiO nanorings on SiC, a novel hierarchical architecture, by a facile two-step method. The dielectric properties depend on temperature and frequency in the range from 373 to 773 K and X band. The imaginary part and loss tangent increase more than four times and three times with increasing temperature, res…
We present experiments where anisometric colloidal microparticles dispersed in a nematic liquid crystal cell with homeotropic anchoring conditions are dynamically assembled by means of liquid-crystal-enabled electrophoresis (LCEEP) using an AC electric field perpendicular to the confining plates. A nematic host with n…
Medium for growth of extreme acidophilic microorganisms. This medium does not contain trace elements. When not working on mineral, addition of trace element \(TE) solution is necessary, see separate protocol. "http://www
The role of the Boltzmann transport equation (BTE) in the Landauer-Datta - Lundstrom (LDL) electron and heat transport model is discussed. As the applications of the BTE there are discussed the BTE in the relaxation time approximation and the behavior of electric current in an external magnetic field as well as expres…
Abstract Surface carbides of cobalt and nickel are exceptionally stable, having stabilities competitive with those of graphitic C on these surfaces. The unusual structure of these carbides has attracted much attention: C assumes a tetracoordinate square‐planar arrangement, in‐plane with the metal surface, and its bind…
New dual frequency nematic liquid crystal mixture has been prepared and investigated by means of dielectric spectroscopy in a wide temperature range (from 120°C to −100°C). The molecular structures of compounds used to prepare the final mixture and mixture's composition influence its dielectric properties. Wide temper…
In this article, a nanostructure poly(amide–imide) (PAI) was prepared from the polymerization of 4,4′-methylenebis(3-chloro-2,6-diethyl trimellitimidobenzene) with 3,5-diamino- N-(4-hydroxyphenyl)benzamide using tetra- n-butylammonium bromide as a green media and triphenylphosphite as a condensing agent. This methodol…
The effect of chemical compositions and microstructures on hydrogen embrittlement of austenitic stainless steel weld metals in high-pressure hydrogen gas was surveyed by using the slow strain rate test (SSRT). As a result, hydrogen embrittlement of the weld metal was hardly influenced by δ ferrite in the weld metal, b…
The performance of a composite environment with human umbilical vein endothelial cells (HUVECs) has been studied to provide an in vitro proof of concept of their potential of being easily vascularized. These cells were seeded in 1 mm thick scaffolds whose pores had been filled with a self-assembling peptide gel, seeki…
We studied the change of electro-optic properties of room-temperature nematic pentylcyanobiphenyl (5CB) when this liquid crystal is mixed with a small amount (∼ 0.5 wt.%) of polymer-capped gold nanoparticles (AuNPs). The AuNPs were spherical-shaped, with a diameter of about 12 nm, the size of the polymer-capped AuNPs…
Here we report results of the study of bent-core (BC) cybotactic nematic LC by dielectric spectroscopy and electro-optic measurements. In the absence of electric field, this material is uniaxial and exhibits only one relaxation process corresponding to the fluctuations of the polar clusters. The application of the ext…
ABSTRACT In this article, we report the effects of nine different monovalent and multivalent salts on the particle size and stability of refined, positively charged polyelectrolyte complexes (PECs) with entrapped surfactant. Dynamic light scattering and ζ potential measurements of these polymeric particles as a functi…
TiO 2 thin and thick films were deposited on silicon/glass substrates using RF inductive plasma in continuous wave. The films thickness, as well as phases control, is achieved with a gradual increase in temperature substrates varying supplied RF power or working gas pressure besides deposition time as well. The deposi…
We report photovoltaic devices based on composites of a branched nanoheterostructure containing a CdTe core and CdSe arms, CdTe(c)-CdSe(a), combined with either poly(3-hexylthiophene), P3HT, or poly[2,6-(4,4-bis-(2-ethylhexyl)-4H-cyclopenta[2,1-b;3,4-b′]dithiophene)-alt-4,7-(2,1,3-benzothiadiazole)], PCPDTBT, with sol…
The method of flexo-dielectro-optical spectroscopy was initially developed to study the spectra of the linear and quadratic electro-optic response of continuous nematic liquid crystal layers as a function of the frequency of the applied electric field at low frequencies (0.1–10000 Hz) [1 Marinov, Y., Shonova, N., Vers…
In the MC881-MC452 binary mixture system developed by MGC, the near-IR Bragg reflection peak is observed in a wide temperature range from 80°C down to room temperature or lower for a narrow concentration region between 54.99 and 57.50 wt.%; the phase responsible for this near-IR Bragg reflection peak can be identified…
The dibenzo[a,c]phenazine discogen having “π-polarization” containing a lateral crown ether and four alkoxy-peripheral side chain, DBPZ-Cn were synthesized. These metal-free crown ether DBPZ-Cn having four dodecylalkoxy side chains were found to be non-mesogenic. The columnar mesophase can be augmented by complexation…
Although many noble-metal catalysts have been used for the oxidation of organosilanes, there has been less success with non-noble-metal catalysts. Here, unsupported nanoporous copper (np-Cu) is used to catalyze the oxidation of organosilanes under mild conditions. It is the first time that this reaction has been achie…
Surface energy and work function are important for understanding metal surface performance. There have been many reports concerning these problems for bcc and fcc metals. However, for hex metals, there are few reports, especially for some surfaces with higher indices. This work focuses on the calculation of surface en…