Materials Literature
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In the present work, a numerical investigation on the mechanism of heat transfer enhancement by a cavitation bubble collapsing near a heated wall has been presented. The Navier–Stokes equations and volume of fluid (VOF) model are employed to predict the flow state and capture the liquid-gas interface. The model was va…
High Resolution Image Download MS PowerPoint Slide The neutral, distorted octahedral complex [TiCl 4 (Se n Bu 2 ) 2 ] ( 1 ), prepared from the reaction of TiCl 4 with the neutral Se n Bu 2 in a 1:2 ratio and characterized by IR and multinuclear ( 1 H, 13 C{ 1 H}, 77 Se{ 1 H}) NMR spectroscopy and microanalysis, serves…
Summary In typical bulk barite inhibition-efficiency (IE) experiments testing scale inhibitors (SIs), the IE is determined by comparing the concentrations of the barium ion in the mix to that in an uninhibited "blank" solution. That is, [Ba2+] vs. time is monitored for both a blank and an inhibited solution. The fate…
Abstract Novel linear diol 2 , diacid 3 , and diisocyanate 4 with functional groups located at each end of the chain have been produced from oleic acid via a diester precursor. All the compounds were fully characterized by IR, 1 H NMR, 13 C NMR and Mass Spectrometry. These unbranched terminally‐functionalized compound…
The poly(L-lactic acid) (PLLA) has potential medical usage such as drug delivery since it can degrade into bioabsorbable products in physiological environments, while the degradation is affected by its crystallites. In this paper, the effects of film formation method and annealing on the crystallites formed in PLLA fi…
In this work, natural plasticizers-modified polypropylenes intended for food active packaging were developed. Sunflower oil, olive oil, and soy lecithin, without any known harmful effects or toxicity, were employed as natural plasticizers, also implementing the attractiveness of using synthetic plastics on active pack…
Silver (Ag) nanoparticles with dendritic, urchin-like, flower-like and sphere-like shapes were controllably synthesized in aqueous hydrogen fluoride (HF) solution at room temperature. The shape of the Ag nanoparticles can be tuned from dendritic to urchin-like, flower-like and sphere-like by increasing the concentrati…
This paper presents the mechanical and gas barrier properties of titanium alloy foil-inserted carbon fiber/epoxy composites (CFRPs) undertaken to improve gas barrier properties for cryogenic propellant tank applications. A newly developed β-titanium alloy (GumMetal, GM) was applied. A sheet of titanium foil (α-Ti or G…
The photonic density of states (PDS) of the eigen polarizations (EPs) in cholesteric liquid crystal (CLC) cells are calculated. The dependences of the PDS on the parameters characterizing absorption, gain and refractive index of the CLC layer surroundings were obtained. We investigated the possibility of connections b…
Oxidative decomposition of low concentrations of chlorobenzene (CB) in air was carried out in a NTP reactor. Typical results indicated the better performance on addition of metal oxide catalysts in plasma zone. It may be concluded that catalytic plasma approach has promise, especially for the removal of low concentrai…
This paper is focused on the preparation and characterization of luminescent hybrid materials of zirconia (alumina, titania) xerogels encapsulated with high luminescent lanthanide polyoxometalates via a sol–gel process. Firstly, liquid compound 1-methyl-3-propionyloxy imidazolium bromide (IM+Br−) is assembled with lan…
A series of d(8) transition-metal (Pt(II) and Pd(II)) coordination complexes incorporating phosphine-functionalized aminoazobenzene derivatives as hemilabile phosphino-amine (P,N) ligands were synthesized and studied as model weak-link approach (WLA) photoresponsive constructs. The optical and photochemical properties…
This study reports the development of calcium alginate-based highly mesoporous carbon spheres (AMCS). These materials exhibit significant potential in chromatographic applications and demonstrated similar efficiency to commercially available porous graphitic carbon (PGC) and are superior to Starbon® materials in separ…
CuIn(1-x)Al(x)Se2 (CIASe) thin films were grown by a simple sol-gel route followed by annealing under vacuum. Parameters related to the spin-orbit (ΔSO) and crystal field (ΔCF) were determined using a quasi-cubic model. Highly oriented (002) aluminum doped (2%) ZnO, 100 nm thin films, were co-sputtered for CuIn(1-x)Al…
Colloidal CdS nanocrystals show strongly enhanced two-photon absorption (TPA) cross sections δ (2) of 10 4 to 10 5 GM over a wide NIR spectral range, making them ideal markers for confocal two-photon microscopy. We present a systematic study of the size and shape dependence of the linear and TPA cross sections for col…
We report on the use of layer-by-layer (LbL) hydrogels, composed of amphiphilic polymers that undergo reversible collapse-dissolution transition in solutions as a function of pH, to induce sharp, large-amplitude wetting transition at microstructured surfaces. Surface hydrogels were composed of poly(2-alkylacrylic acid…
Formation of a cylindrical microphase-separated structure (∼20 nm periodicity) of a liquid crystalline block copolymer comprising poly(ethylene oxide) (PEO) and poly(methacrylate) (PMA) bearing azobenzene (Az) mesogens in the side chains was investigated by in situ atomic force microscopy (AFM). The amphiphilic liquid…
In this work, nonfouling polypeptides with homogenous alternating charges were synthesized by polycondensation of the covalently bonded dimer of glutamic acid (E) and lysine (K) (EK dimer) with benzyloxycarbonyl (Z)-protected side chains. This facile method successfully solved the uniformity problem of nonfouling pept…
Abstract Periodic, self‐consistent density functional theory calculations (DFT‐GGA‐PW91) on Pt(1 1 1) and Pt 3 Re(1 1 1) surfaces, reaction kinetics measurements, and microkinetic modeling are employed to study the mechanism of the water–gas shift (WGS) reaction over Pt and Pt–Re catalysts. The values of the reaction…
N-Decanoyl-L-alanine (DA) was mixed with either colorless 4,4'-bipyridine (BP) or various derivatives such as chromogenic oligo(p-phenylenevinylene) (OPV) functionalized with isomeric pyridine termini in specific molar ratios. This mixtures form salt-type gels in a water/ethanol (2:1, v/v) mixture. The gelation proper…