Materials Literature
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We present the results of our 13 C NMR study of the quasi-two-dimensional organic conductor θ-(BEDT-TTF) 2 I 3 under pressure, which is suggested to be a zero-gap conductor by transport measurements. We found that NMR spin shift is proportional to T and that spin–lattice relaxation rate follows the power law T α (α=3–…
Abstract This article reports the results of novel polyaniline material as gas sensor, capable of operating at room temperature for toxic gases. Polyaniline–maleicacid–dodecylhydrogensulfate salt (PANI‐MA‐DHS) was prepared by emulsion polymerization pathway, which is soluble in N, N‐dimethyl formamide. PANI‐MA‐DHS was…
Abstract Latches are essential machine elements utilized by all sectors (military, automotive, consumer, manufacturing, etc.) with a growing need for active capabilities such as automatic release and reset, which require actuation. Shape memory alloy (SMA) actuation is an attractive alternative technology to conventio…
Die Aktivierungsbarriere der Wanderung von Oberflächenwasserstoff auf den (111)-Flächen von Pd-Nanopartikeln unter deren Oberfläche sinkt drastisch oder verschwindet ganz, wenn nahe unter der Oberfläche Kohlenstoffatome eingelagert sind (siehe skizziertes Energiediagramm). Dieser begünstigende Effekt fehlt bei regulär…
A series of inclusion complexes of poly(ethylene oxide)-block-poly(propylene oxide)-block-poly(ethylene oxide) (PEO-b-PPO-b-PEO) with beta-cyclodextrin (beta-CD) was prepared. Their formation, structure, and dynamics were investigated by solution two-dimensional rotating-frame Overhauser effect spectroscopy (2D ROESY)…
Abstract Styrene‐butadiene rubber (SBR) nanocomposites with different organoclay contents (up to 15 phr) were prepared by a melt compounding procedure, followed by a compression‐molding step in which the SBR matrix was sulfur crosslinked. The vulcanizates were characterized in respect to their curing, mechanical and v…
The possibility of antireflection (AR) coatings on a dielectric multilayer having sub-wavelength deep structural modification is investigated. We numerically surveyed the effect of reflectivity reduction attained by double-layer AR coatings for a wavy multilayer on a patterned substrate. It was clarified that double-l…
Chemical synthesis and concentration dependence of two second order NLO tensor components: and was studied for a side chain polymer PMMA-DR1 in thin films by optical second harmonic generation techniques. The noncentrosymmetry was created by the corona poling technique. The results show that for small chromophore conc…
In situ AFM observation of polymorphic transition of caffeine form I (stable at high temperatures) to form II (stable at room temperature) was conducted to obtain fundamental information on the mechanism with which the solid state transition progresses. From the observation of formation of projections of a new phase (…
Leaf fibers are fibers that run lengthwise through the leaves of most monocotyledonous plants such as pineapple, banana, etc. Pineapple (Ananas comosus) and Banana (Musa indica) are emerging fiber having a very large potential to be used for composite materials. Over 150,000 ha of pineapple and over 100,000 ha of bana…
This work presents the preparation of copper nanoparticles (CuNPs), using as support, inclusion compounds (ICs) formed by α-cyclodextrin (α-CD) with alkylamines as guests. These ICs provide a suitable environment to anchor and immobilize the nanoparticles, because the functional group of the guest molecule provides ou…
Aluminum borates are synthesized via a precipitation process. Aluminum nitrate and calcium hexaboride (CaB 6 ) as a source of B 2 O 3 were used. Various proportions of aluminum nitrate were mixed with CaB 6 powder and to a solution of ammonium hydroxide. The resulting mixtures were evaporated and calcined up to 650°C.…
A technique is proposed to grow horizontal carbon nanotubes (CNTs) bridging metal electrodes and to assess their electrical properties. A test structure was utilized that allows for selective electrochemical sidewall catalyst placement. The selectivity of the technique is based on the connection of the desired metal e…
Spherical quartz vessels containing an iodide/iodate chemical actinometer are useful for measuring the fluence of omnidirectional germicidal radiation. It is shown here that such vessels can be used not only for exposure purposes but also for measuring the absorbance of the resulting triiodide endpoint. A hand-held co…
ADVERTISEMENT RETURN TO ISSUEPREVBook ReviewSingle Particle Tracking and Single Molecule Energy TransferLinda PeteanuView Author Information Carnegie Mellon UniversityCite this: J. Am. Chem. Soc. 2010, 132, 24, 8526Publication Date (Web):May 25, 2010Publication History Published online25 May 2010Published inissue 23 J…
Density functional theory calculations have been carried out to investigate the alpha, beta, gamma, delta, and epsilon isomers of [(MnO(4))Me(12)Sb(12)O(24)](6-) (Me = CH(3)) anions, which are simplified Baker-Figgis models of Keggin-type antimonate complexes in experiments. It is found that the stability order of the…
Hard X-ray and extremely low energy bulk-sensitive photoelectron spectroscopy has been performed in the temperature range of 100–330 K for Fe 3 O 4 . In the high temperature phase just above the Verwey transition, the intensity at the Fermi level ( E F ) is still very weak, but it increases gradually with further incr…
In this paper, we present the results of combined molecular dynamics−Metropolis Monte Carlo (MD-MMC) simulations of hydrocarbon species at flat diamond (100)2 × 1 and (111)1 × 1 surfaces. The investigated species are considered to be the most important growth species for (ultra)nanocrystalline diamond ((U)NCD) growth.…
Abstract Biobased nanocomposites were manufactured through the melt intercalation of nanoclays and starch esters synthesized at the Fraunhofer Institute for Applied Polymer Research (IAP) from high amylose starch. Starch acetates (SAs) and starch propionates (SPs) were tested in combination with glycerol triacetate (t…
We investigated the effects of millimeter wave treatment on the expression of the cell cycle regulating proteins cyclin-dependent kinase 2 (CDK2) and cyclin A in chondrocytes. Knee articular cartilage from SD rats was used to establish cultured primary chondrocytes. After identification using toluidine blue staining,…