Materials Literature
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Self-aggregation of organic pigment nanoparticles in organic solvent produces poor quality thin-film coatings. The nonuniformity of surface layers produced by dense aggregates within films of nanopigments can be detrimental for light transmission. Formulating dispersions composed of an organic pigment and an organic s…
No presente trabalho, avaliaram-se as propriedades físico-mecânicas de painéis aglomerados produzidos com diferentes proporções de madeira (Eucalyptus grandis) e casca de arroz. Para caracterização dos painéis produzidos com os adesivos ureia-formaldeído e tanino-formaldeído, nas proporções 0, 20, 40, 60, 80 e 100% de…
Extensive angiogenesis, formation of new capillaries from pre-existing blood vessels, is an important feature of malignant glioma. Several antiangiogenic drugs targeting vascular endothelial growth factor (VEGF) or its receptors are currently in clinical trials as therapy for high-grade glioma and bevacizumab was rece…
Regarding the increasing demands for the fire resistance polyurethane foam for train and airplane industry and a serious planning to phase out the halogenated flame retardants (FR) because of high and toxic smoke generation, the use of halogen-free fire retardants have been more investigated in recent years. In this w…
The ability to manipulate miniature object assemblies with well-defined structures in a controllable manner is of both fundamental and applied interests. This article presents general strategies, with nanospheres as building blocks, to engineer mesoscopic spherical architectures via a process of evaporation-driven sel…
It has been known that acid-resistant concretes on the liquid glass basis have high porosity (up to 18<TEX>${\sim}$</TEX>20%), low strength and insufficient water resistance. Therefore they can not be used as materials for load-bearing structural elements. Significant increasing of silicate matrix strength and density…
Polyvinyl chloride (PVC) is among the top three most widely used plastics globally. Di(2-ethylhexyl) phthalate (DEHP) is often added as a plasticizer by up to 40 wt% to impart flexibility. DEHP, a toxin and carcinogen, can leach into the atmosphere to cause environmental contamination. This study investigates the suit…
We successfully fabricated γ-cyclodextrin (γ-CD) nano- and microstructures of various morphologies, such as cubes, rods, and rectangular particles, simply by modifying the preparation method for channel-type γ-CD assemblies. These γ-CD structures formed organogels in oils and organic solvents, and the morphologies of…
The interaction between silica and poly(ethylene oxide) (PEO) in water may appear trivial and it is generally stated that hydrogen bonding is responsible for the attraction. However, a literature search shows that there is not a consensus with respect to the mechanism behind the attractive interaction. Several papers…
Abstract The aim of the present study was to investigate feedback control of a reactive crystallization process. The present study built up a control structure needed to control the driving force of reactive crystallization using the feed rate of added acid. The concentration of the crystallizing compound and pH was u…
The widths of the valence bands in the copper (I) delafossites ${\text{CuGaO}}_{2}$, ${\text{CuInO}}_{2}$, and ${\text{CuScO}}_{2}$ have been measured by $\text{O}\text{ }K$-shell x-ray emission spectroscopy and are compared with previous experimental work on ${\text{CuAlO}}_{2}$ and ${\text{CuCrO}}_{2}$. In agreement…
Herein we demonstrate a simple but versatile bioinspired polyamine-catalyzed silicification route to synthesizing functional materials which is monodisperse, mesoporous, and spherically uniform having nanosizes under extremely mild conditions similar to the biosilicification processes. Employing the principles learned…
Within a two-band model for the recently discovered ferropnictide materials, we calculate the thermal conductivity assuming general superconducting states of ${A}_{1g}$ (``$s$-wave'') symmetry, considering both currently popular isotropic ``sign-changing'' $s$ states and states with strong anisotropy, including those…
Missing in action: Relativistic density-functional methods provide a reliable framework to predict the features of 195Pt, 183W, and 17O NMR spectra of terminal oxo Pt and Au complexes (see picture for [P2W20O70Au(O)(OH2)3]9−; Au yellow, W blue, P orange, O red, H white). The complexes have an extremely small HOMO–LUMO…
The assembly mechanism by which hundreds of thousands of two-segment gold-polypyrrole nanorods are assembled into kinetically controlled shape-directed superstructures is examined to predict the range of nanoparticle sizes and materials that can be utilized in their formation. Four processes are responsible for assemb…
Three functional bidentate aryl phosphine oxide (APO) derivatives characterized by two diphenylphosphine oxide moieties [2-(diphenylphosphoryl)- N -(2-(diphenylphosphoryl)-4-methoxyphenyl)-4-methoxy- N -(4-methoxyphenyl)aniline (TMOADPO), 3,6-bis(diphenylphosphoryl)-9-ethyl-9 H -carbazole (EtCzDPO), and 3,6-bis(diphen…
New catalyst systems for diyne polycyclotrimerization were developed. E -1-[2-(2,5-Diethynylphenyl)vinyl]ferrocene ( 1 ), a ferrocene-containing diyne, was polymerized by ruthenium- and rhodium-based catalysts, affording hyperbranched polyphenylenes ( hb -P 1 ) with high molecular weights ( M w up to ∼1.4 × 10 5 ) in…
By sequential growth of the core and shell of different materials, ZnO/ZnS and ZnO/MgO core/shell nanowire arrays are fabricated. Photoluminescence properties of these samples with different shell thicknesses are studied in detail. The results indicate that the ZnS shell thickness as a function of treatment time will…
Group 14 metal complexes of heavy chalcogen-centered anions, M[(TeP(i)Pr(2))(2)N](2) (5, M = Sn; 6, M = Pb) and M(TeP(i)Pr(2)NP(i)Pr(2)Se)(2) (7, M = Sn; 8, M = Pb), were synthesized in 64-89% yields by metathesis of alkali-metal salts of the ligands with group 14 metal dihalides. Crystallographic characterization of…
Soft lithographic techniques augment or enhance the capabilities of traditional patterning processes and expand the diversity of materials that can be patterned. Realization of robust parallel techniques for creating chemical patterns at the nanoscale has been challenging. Here we present a method for creating and rep…