Materials Literature
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The effect of montmorillonite clay on the compressive properties of Epikote 828 epoxy was studied. A series of epoxy-based nanocomposites with 1-5 wt.% nanoclay content was prepared. The degree of dispersion and exfoliation was investigated using transmission electron microscopy. Static uniaxial compression tests were…
The adsorption of terephthalic acid molecules [C(6)H(4)(COOH)(2)), TPA] on a single layer of graphene grown epitaxially on Ni(111) has been investigated by means of near-edge X-ray absorption fine structure (NEXAFS) spectroscopy and X-ray photoelectron spectroscopy (XPS) at room temperature. The assignment of the NEXA…
The direct conversion of methane and carbon dioxide to acetic acid is one of the most challenging research topics. Using the density functional theory (M06-L) the study reveals the catalytic activity of the Au(I)-ZSM-5 zeolite in this reaction. The Au(I)-ZSM-5 is represented by a 34T quantum cluster model. The activat…
Size-dependent electronic structures around the Fermi level of glutathione-protected gold clusters (0.9-1.4 nm in core diameter) were analyzed on the basis of photoinduced charge separation at the interface between the gold cluster and TiO(2). Electron levels such as HOMO and LUMO were estimated from the dependencies…
Searches for planar hexacoordinate carbon (phC) species comprised of only seven atoms uncovered good CX(3)M(3) prototypes, D(3h) CN(3)Be(3)(+) and CO(3)Li(3)(+). The latter is the global minimum. It might also be possible to detect the deep-lying kinetically-viable D(3h) CN(3)Be(3)(+) local minimum, based on its robus…
Naturally occurring oleic acid and undecylenic acid derivatives were successfully utilized to synthesize a series of new semi-crystalline polyurethanes via the AB-type polycondensation approach. A set of four novel AB-type monomers was prepared via the use of environmentally benign thiol–ene chemistry. These AB-type m…
Recent work has shown the potential of ionic liquids (ILs) as a precursor for porous networks and nitrogen doped carbon materials. The combination of liquid state and negligible vapour pressure represents almost ideal precursor properties and simplifies the processing drastically. Here, we extend this work to get a de…
In the present work, the alternating current (AC) induced corrosion of a cathodically protected X65 pipeline steel was studied in a neutral, extracted soil solution and a high pH, carbonate/bicarbonate solution by electrochemical and weight loss measurements, and surface characterisation. It was found that AC corrosio…
Porous V2O5 micro/nano-tubes were synthesized via a modified chemical vapor deposition process and a possible growth mechanism was proposed. The micro/nano-tubes have large surface area because of their tubular structure with a porous wall. A humidity sensor based on a single porous V2O5 micro/nano-tube was constructe…
Silicon is one of the major constituents of the earth's crust and, in its elemental form, the base of many semiconductor applications, including electronics and energy conversion. Downsizing Si to the nanoscale dimension extends its application to diverse fields, which, however, is often plagued by expensive and ineff…
In functional materials, nanoscale phase boundaries exhibit exotic phenomena that are notably absent in their parent phases. Over the past two decades, much of the research into complex oxides (such as cuprate superconductors, CMR manganites and relaxor ferroelectrics) has demonstrated the key role that nanoscale inho…
Polyoxometalates covalently linked to one or two spiropyran entities have been isolated. These organic-inorganic hybrids exhibit multi-electrochromic and photochromic properties.
OBJECTIVE: To characterize the structure and to evaluate the cytotoxicity of cellulose nanowhiskers (CNW) prepared from cotton linters. METHODS: A series of CNW dispersions was prepared by hydrolyzing cotton linters with sulfuric acid. The structure of CNW was characterized by scanning electron microscopy (SEM), trans…
A combined cellular automaton-finite difference (CA-FD) model has been developed to simulate solute diffusion controlled solidification in continuous steel casting. Constitutional and curvature undercooling were both solved to determine the equilibrium temperature and growth velocity of the solid/liquid interface. Sim…
Triazole and triazolium groups have been integrated into a zinc(II) metalloporphyrin-based structural framework to produce two porphyrin-cages for anion sensing applications. UV/visible spectroscopic titration investigations reveal both host systems exhibit strong anion binding affinities, with the positively-charged…
Mesoporous silica/carbon nanomaterials with various hierarchical structures have been fabricated by a one-pot approach. Polymer/silica/surfactant (PSS) composites are first prepared by the co-sol–gel process of TEOS and resorcinol–formaldehyde precursor in the presence of CTAB. The PSS morphologies could be tuned by s…
A superhard boron nitride phase dubbed as Z-BN is proposed as a possible intermediate phase between h-BN and zinc blende BN (c-BN), and investigated using first-principles calculations within the framework of density functional theory. Although the structure of Z-BN is similar to that of bct-BN containing four-eight B…
When a small amount (less than 1%) of a second immiscible liquid is added to the continuous phase of a suspension, the rheological properties of the admixture are dramatically altered and can change from a fluid-like to a gel-like state. These so-called capillary suspensions transition to a gel-like state both if the…
Post-polymerization modification is a powerful strategy to endow polymers with functional groups that cannot be incorporated via direct polymerization. This manuscript explores the reversible addition–fragmentation chain transfer polymerization (RAFT) of pentafluorophenyl methacrylate (PFMA) to prepare active ester co…
Copper ferrite (CuFe2O4) hollow fibers were fabricated by direct annealing of electrospun precursor fibers with appropriate heating rate. The crystal structure, morphology, magnetic properties and electrochemical properties of as-made CuFe2O4 hollow fibers were investigated by using X-ray diffraction, Fourier-transfor…