Materials Literature
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Abstract Functionalized multiwalled carbon nanotubes (FMWCNTs) have been introduced into immiscible polystyrene/polypropylene (PS/PP) blends. Not only the change in glass‐transition temperatures of PS and PP but also the crystallization and melting behaviors of PP have been investigated. The results show that FMWCNTs…
We have recently reported on poly(vinyl alcohol) microparticles containing X-ray contrast agent, iopamidol, designed as a flow tracer working in synchrotron X-ray imaging ( Biosens. Bioelectron. 2010 , 25 , 1571 ). Although iopamidol is physically encapsulated in the microparticles, it displays a great contrast enhanc…
Field emission from aligned carbon nanotube (CNT) blocks and bundles grown by two different chemical vapor deposition (CVD) methods were investigated. A single CNT block consists of about 1600 double-walled nanotubes per μm2 of area with an intertube distance in the range 15–20 nm, while a bundle consists of a few mul…
There is currently great interest in the potential use of carbon nanotubes as delivery vessels for nanotherapeutics and other medical applications. However, no data are available on the effects of sterilization methods on the properties of nanotube dispersions, the form in which most medical applications will be proce…
We investigate the occurrence of waterlike thermodynamic and dynamic anomalous behavior in a one dimensional lattice gas model. The system thermodynamics is obtained using the transfer matrix technique and anomalies on density and thermodynamic response functions are found. When the hydrogen bond (molecules separated…
We present a mechanism for controlling the accumulation and discharge of Al atoms using electromigration, by which long thin Al wires of lengths up to 336 µm and diameters ranging from 0.8 to 4 µm were fabricated. The experimental samples were Al lines formed on a TiN layer and covered with a SiO 2 passivation layer.…
We investigate the phase diagram of a discrete version of the Maier-Saupe model with the inclusion of additional degrees of freedom to mimic a distribution of rodlike and disklike molecules. Solutions of this problem on a Bethe lattice come from the analysis of the fixed points of a set of nonlinear recursion relation…
Purpose The purpose of this paper is to study, under laboratory conditions, the corrosive effect of sulfur dioxide (SO 2 ) present in the atmosphere of urban and industrial areas on various construction materials. Design/methodology/approach Iron, copper and brass metals were exposed to SO 2 gas at different relative…
To facilitate the application of plasmonic nanoparticles (PNPs) in high-throughput detection, we develop a hyperspectral imaging system (HSIS) combining dark-filed microscopy and imaging Fourier transform spectrometry to measure scattering spectra from immobilized PNPs. The current setup has acquisition time of 5 seco…
In liquid crystals (LCs), molecules are confined in peculiar environments, where ordered alignment and certain mobility are realized at the same time. Considering these characteristics, the idea of "controlling molecular events within LC media" seems reasonable. As a suitable system for investigating this challenge, w…
Concentrated solutions of a water-soluble block copolymer (PEO)20-(PPO)70-(PEO)20 show a thermoreversible transition from a liquid to a gel. Over a range of concentration there also exists an order-order transition (OOT) between cubically-packed spherical micelles and hexagonally-packed cylindrical micelles. This OOT…
Multiwalled carbon nanotubes (MWCNTs) and activated carbon (AC)-supported K (9 wt %)-promoted trimetallic Co (4.5 wt %)−Rh (1.5 wt %)−Mo(15 wt %) catalysts are used to study the long-term deactivation for continuous 720 h of higher alcohols synthesis (HAS). The fresh catalysts are extensively characterized in both oxi…
Die Strukturaufklärung des ersten zweikernigen HgII-Komplexes mit einem regulären Porphyrin offenbart eine Unsymmetrie, die durch Anbindung von DMSO-Molekülen an die Metallionen, die zwei allosterisch verbundene Bindungsstellen bilden, bewirkt wird (siehe Struktur; grau C, orange Hg, blau N, rot O, gelb S). Der kooper…
Mg 0.25 Zn 0.75 O / ZnO -quantum well nanowire heterostructures were grown with a three-step pulsed laser deposition process. To avoid shadowing effects during the coating, the ZnO nanowires were grown with a low area density on a ZnO buffer layer deposited on an a-plane sapphire substrate. By using spatially resolved…
Highly conductive thin films of ZnO doped with Ga were grown by pulsed laser deposition with 10 mTorr of H2 in the growth chamber. Compared with a more conventional method of producing conductive films of ZnO, i.e., growth in O2 followed by annealing in forming gas (5% H2 in Ar), the H2 method requires no postgrowth a…
Jute fiber-reinforced melamine composites (16–35% fiber) were prepared by hot press at 125°C for 10 min at 8 MT pressure. Tensile strength, tensile modulus, bending strength, bending modulus and impact strength of the composites (16% fiber) were found to be 44 MPa, 532 MPa, 112 MPa, 1.4 GPa and 13 kJ/m2, respectively.…
Ein attraktives Pärchen: Das Titelsystem (TCNQ=Tetracyanochinodimethan) ist durch eine durch H-Brücken verstärkte Schichtstruktur aus alternierenden TCNQ-Anionen und Prolin-Kationen charakterisiert (siehe Bild). Das Kation wird von zwei zwitterionischen Prolinmolekülen mit einer Protonenbrücke zwischen den Carboxylatg…
Purpose – The purpose of this paper is to investigate the effects of several azole derivatives on the corrosion inhibition of irradiated and non‐irradiated plain carbon steel in 0.5 M nitric acid (HNO3) solutions at 30‐60°C and to study the mechanism of their inhibitive action.
The transmission electron microscope (TEM) is an indispensable tool for the study of magnetic micro- and nano-structures. High resolution digital detectors have largely replaced film as the primary detection method for electron microscopy. In this study we assess the benefits of using the Medipix2 chip, bump bonded to…
Polypropylene (PP) matrix natural degradable chitosan fiber reinforced unidirectional composites (5% fiber by weight) were fabricated by compression molding. It was found that tensile strength (TS), tensile modulus (TM), elongation at break (%), bending strength (BS), bending modulus (BM) and impact strength (IS) were…