Materials Literature
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In pulsed laser deposition of the sesquioxide semiconductor Gd2O3, adjusting the chamber oxygen pressure controls the crystalline structure of the host. This technique was used to deposit thin films of nominally 1.6% by weight europium-doped, cubic phase Gd2O3 using 50 mTorr of oxygen. Structural measurements using hi…
Abstract After ( R )‐12‐hydroxystearic acid (HSA) was mixed at 100 °C with the castor oil‐modified poly(ε‐caprolactone) (CO‐PCL) prepared by the ring‐opening polymerization of ε‐caprolactone in the presence of castor oil, the mixture was gradually cooled to room temperature to give a solidified CO‐PCL/HSA composite. T…
This report is important to achieving SWCNT solvation, understanding adsorption of molecules on SWCNT surfaces, and SWCNT characterization by NMR. Complexation of 1-methyl-2-pyrrolidone (NMP) and other selected organonitrogens with single-walled carbon nanotubes (SWCNTs) was studied by proton nuclear magnetic resonanc…
Two new chiral dinuclear Mn(III)-Salen complexes with inherent phase-transfer capability have been synthesized, which serve as catalysts in the asymmetric epoxidation of nonfunctionalized alkenes. Experimental results show these complexes are effective catalysts for the asymmetric epoxidation of some cyclic alkenes an…
Lean-burn engines operate at a very lean air-to-fuel (A/F) ratio under light-load and part-load regions. Because of better combustion in the lean mixture, fuel economy enhancement is the major merit. Lean-burn technologies also give rise to high engine performance and low emission levels (hydrocarbons and carbon monox…
The first structure of an NAD-dependent tartrate dehydrogenase (TDH) has been solved to 2 A resolution by single anomalous diffraction (SAD) phasing as a complex with the intermediate analog oxalate, Mg(2+) and NADH. This TDH structure from Pseudomonas putida has a similar overall fold and domain organization to other…
Abstract Five commodity thermoplastics (polyethylene, polypropylene, thermoplastic polyurethane, poly(butylene terephthalate), and poly(amide 6)) were melt compounded with vapor grown carbon nanofibers via twin screw extrusion. These materials were then analyzed for flammability behavior by cone calorimeter to determi…
Based on the field enhancement principle of trapped modes, two new asymmetric metamaterial resonators are presented. Transmission response (S 21 ) of the rectangular wave-guide filled with an asymmetric metamaterial resonator is simulated. Results show that the asymmetric resonator possesses high Q-factor and improved…
Abstract The effect of filler loading on the mechanical properties of crosslinked triazole polymers obtained by polymerization of E300 dipropiolate ( 1 ) with diazide ( 2 ) obtained from tetraethylene glycol using tetraacetylene functionalized crosslinker ( 3 ) was studied systematically. Aluminum (10–14 μm) was used…
In an effort to improve automobile fuel economy, an experimental study was undertaken to explore the practical aspects of implementing thermoelectric devices for exhaust gas energy recovery. An experimental apparatus consisting of a hot-side (exhaust gas) rectangular duct and a cold-side (coolant liquid) rectangular d…
X-ray photoelectron diffraction has become a common method to determine element-specific local atomic surface structure. The use of hard X-rays makes this method bulk-sensitive and capable of studying the atomic structure of new materials such as multilayers and buried layers. We present the first Cr Kα-excited angle-…
The location of isomorphously substituted zinc over eight crystallographically different gallium sites has been determined in a single-crystal study of the gallophosphate ZnULM-5, Ga((16-x))Zn(x)(PO(4))(14)(HPO(4))(2)(OH)(2)F(7), [H(3)N{CH(2)}(6)NH(3)](4), 6H(2)O, in an 11 wavelength experiment, using data from Statio…
Abstract Nonlinear stress relaxation behavior of carbon black‐filled rubber vulcanizates under large strain is investigated for the three types of deformation (equibiaxial stretching, pure shear, and uniaxial stretching) with various sets of two principal ratio (λ 1 and λ 2 ). The stress relaxation curves in the wide…
Conformal atomic layer deposition of thin Sb(2)S(3) layers takes place epitaxially on suitable substrates at 90 degrees C. More elevated deposition temperatures increase the mobility of the solid and result in the diffusion of Sb(2)S(3) along surface energy gradients. On an Sb(2)Se(3) wire that presents the high-energ…
This experimental and theoretical contribution is aimed at investigating the electronic structure of cationic electron-rich ethynylpyridyl Fe(III) derivatives of the formula [(η 2 -dppe)(η 5 -C 5 Me 5 )FeC≡C( x -C 5 H 4 N)][PF 6 ] ( x = 4, 3, 2; 1a − c [PF 6 ]) and [(η 2 -dppe)(η 5 -C 5 Me 5 )FeC≡C(2,5-C 5 H 3 NX)][PF…
High-purity, type IIa diamond is investigated by noncontact atomic force microscopy (NC-AFM). We present atomic-resolution images of both the electrically conducting hydrogen-terminated C(100)-$(2\ifmmode\times\else\texttimes\fi{}1):\text{H}$ surface and the insulating C(100)-$(2\ifmmode\times\else\texttimes\fi{}1)$ s…
Abstract GaN nanostructures grown on n‐type Si (111) substrate were applied as photo‐illuminated working electrodes for photoelectrochemical water splitting. Photocurrent density increased with the density of GaN nanodots. The photocurrent density was, however, quite small compared to that of GaN nanorods and decrease…
Abstract Polystyrene (PS) was flame retarded with a polymeric intumescent flame retardant, poly(diaminodiphenyl methane spirocyclic pentaerythritol bisphosphonate) (PDSPB), and in situ compatibilized with styrene‐maleic anhydride (SMA) copolymer. Compatibilization reaction was verified by IR spectroscopy and gel conte…
Abstract Filled EPDM materials have been processed and aged by gamma radiation at ambient temperature and at 80 °C to study the influence of the fillers presence in the material degradation. The acceleration of the polymer degradation by the ATH fillers, evidenced when irradiation is performed at 25 °C, is also effect…
Abstract Exhaustion of fossil fuels, tremendous increase of materials demand, and unpredictable prices of petroleum based products urge upon the sustainable development. Three different epoxy resins have been synthesized from monoglyceride of Mesua ferrea L. seed oil and epichlorohydrin with and without other dihydrox…