Materials Literature
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Single wall carbon nanotubes (SWNT) were functionalized via addition of carbon radicals, which were generated by thermal decomposition of diacyl and dibenzoyl peroxides. Reaction products were investigated with TEM, Raman scattering, TGA, UV−Visible spectroscopy, FTIR, and 1 H NMR. In Raman spectra of functionalized S…
ADVERTISEMENT RETURN TO ISSUEPREVNoteUltra-Water-Repellent Poly(ethylene terephthalate) SubstratesKatsuya Teshima, Hiroyuki Sugimura, Yasushi Inoue, Osamu Takai, and Atsushi TakanoView Author Information Department of Materials Processing Engineering, Graduate School of Engineering, Nagoya University, Nagoya 464-8603,…
Iron(II) complexes of triazole derivatives having two C12 and C16 long alkyl chains, (C12trz)FeII and (C16trz)FeII, serve as novel spin-crossover materials, which display a spin-state transition in response to a phase transition. In contrast, a triazole complex with two C8 alkyl chains ((C8trz)FeII) exhibits only a po…
A series of two-dimensional (2D) spin crossover complexes, [FeIIH3L(Me)][FeIIL(Me)]X (X-=ClO4-, BF4-, PF6-, AsF6-, SbF6-) 1-5, have been synthesized, where H3L(Me) denotes an hexadentate N6 tripodlike ligand containing three imidazole groups, tris[2-(((2-methylimidazol-4-yl)methylidene)amino)ethyl]amine. Compounds 1-5…
The biosynthesis of CaCO3 by reaction of aqueous Ca2+ ions with a fungus, Fusarium sp., and an actinomycete, Rhodococcus sp. (both plant organisms), is described. In the case of the fungus, cruciform-shaped calcite crystals are obtained (SEM picture A) while the actinomycete yielded the unstable polymorph of CaCO3, va…
The adsorption storage of methane on triangular arrays of single-walled carbon nanotubes (SWNT) at room temperature was investigated by the grand canonical Monte Carlo (GCMC) method. In the simulation, carbon atoms on the tubular wall were structured according to the ( m, m ) armchair arrangement, and the site-to-site…
The electrochemical incineration of organic pollutants on a boron-doped diamond (BDD) thin film electrode was examined by bulk electrolysis, and the mechanism of oxidation was investigated. A comparative study with other electrodes such as Pt and glassy carbon (GC) electrodes revealed the superiority of the BDD over t…
Caged compounds can be used to regulate the spatial and temporal dynamics of signaling molecules in live cells. Photochemical properties of coumarin-4-ylmethoxy carbonates (1a-d) are investigated to construct caged compounds of hydroxy-containing molecules. All the compounds possess desired properties as phototriggers…
We report studies of random sequential adsorption on the pre-patterned Bethe lattice. We consider a partially covered Bethe lattice, on which monomers and dimers deposit competitively. Analytical solutions are obtained and discussed in the context of recent efforts to use pre-patterning as a tool to improve self-assem…
Nanostructures of polyaniline (PAni) and polypyrrole (PPy) with controlled morphologies have been synthesized on atomically flat surfaces using adsorbed surfactant molecules as templates. Atomic force microscopy (AFM) has been used to investigate polymer film formation on highly oriented pyrolytic graphite (HOPG) and…
Binary blends of linear low-density polyethylene (LLDPE) and a series of highly photoluminescent (PL) 1,4-bis(α-cyano-4-alkoxystyryl)benzenes were prepared using melt-processing techniques. It was shown that the phase behavior of these blends, which comprised 0.01−3% w/w of the PL guest, could be controlled via the mo…
We report a new family of oligomeric alkyl phosphine ligands for nanocrystal quantum dots. These oligomeric phosphines show effective binding affinity to quantum dot surfaces. They form thin and secure organic shells that stabilize quantum dots in diverse environments including serum and polymer matrices. They maintai…
High-precision crystal structure parameters have been determined from Rietveld refinement of high-resolution neutron powder diffraction data in Nd 3 (Fe,Ti) 29 and Nd 3 (Fe,Ti) 29 N x intermetallics. The construction of the corresponding Wigner–Seitz (WS) polyhedra has revealed that some 12-fold (group-A) environments…
Abstract The crystallization behaviors and crystalline morphologies of initial and chain‐extended nylon 66 samples were studied with differential scanning calorimetry and polarizing microscopy, respectively. The crystallization rate increased and the size of the spherulites decreased with chain‐extension. In addition,…
Core and valence level photoemission spectra of β- and cubic-Si3N4 have been measured under monochromatic Al Kα excitation. Strong satellites to high binding energy of the core lines are shown to arise from excitation of valence electron plasmons during the photoemission process. An increase in the plasmon energy from…
Abstract Packaging‐related properties of coated films of chitosan–acetic acid salt and whey protein concentrate (WPC) were studied. Chitosan (84.7% degree of deacetylation) and WPC (65–67% protein) were solution cast to films. These films are potential oxygen barriers for use in packaging. Coatings of wax or alkyds we…
We report measurements of angle-resolved light scattering in porous silicon films. Scattering rings were observed, and their aperture allowed to measure optical birefringence. These values are confirmed with other techniques. We study birefringence changes when pores are filled with liquids, after thermal annealing, a…
We have investigated the adsorption of hydrogen of multiwall carbon nanotubes synthesized by the pyrolysis method using a lanthanum nickel hydrogen storage alloy as a catalyst. The mechanism of carbon nanotubes synthesized using a La–Ni alloy catalyst is discussed. In the hydrogen atmosphere and high-temperature proce…
Clustering of Mg in Al–Mg binary alloys is studied by means of atomistic simulations. The phenomenon is analysed in the undistorted Al lattice, as well as in the presence of dislocations. In the undistorted lattice, Mg has a tendency to cluster in a coherent phase. The binding energy of this structure is rather low an…
Gd nanoparticles and carbon coated Gd/GdC2 nanocapsules have been prepared by means of arc discharge in argon and methane, respectively. In the Gd nanoparticles, gadolinium oxide was detected by x-ray diffraction, while the presence of metallic gadolinium was proved by oxygen analysis and x-ray photoelectron spectra.…