Materials Literature
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A diblock copolymer consisting of poly(3-(triethoxysilyl)propylisocyanate) (PIC) and polystyrene(PS) was synthesized by anionic polymerization. A polymeric monolayer of the block copolymer was formed on silica substrates by various grafting techniques such as immersion, casting, or contact-printing. The PIC block adhe…
In this paper, the structural and electrochemical properties of the superstoichiometric ( Ti 0.8 Zr 0.2 ) ( V 0.533 Mn 0.107 Cr 0.16 Ni 0.2 ) x ( x = 2 , 3, 4, 5, 6) hydrogen storage alloys have been studied systematically. It is found by X-ray diffraction and energy dispersive spectra analysis that all these alloys m…
Diphenylphosphine functionalised polyhedral oligomeric silsesquioxane (POSS) dendrimers are used as ligands for the rhodium catalysed hydroformylation of oct-1-ene showing unexpectedly high regioselectivity to the linear aldehyde nonan-1-al (l ∶ b = 14 ∶ 1). Comparative studies with the small molecule analogues, bis-d…
The dynamics in the isotropic phase of the liquid crystal 1-isothiocyanato-(4-propylcyclohexyl) benzene (3-CHBT) are investigated from very short time (∼1 ps) to very long time (>100 ns) as function of temperature. The data decay exponentially only on the longest time scale (>10 ns). The temperature depe…
Abstract The ability of unrestricted Hartree–Fock (UHF), Møller–Plesset (MP2), density functional theory (DFT), and hybrid density functional/Hartree–Fock methodologies to describe the structure and spin‐state energetics of iron porphyrins was assessed. In the first place, these techniques have been applied to Fe, Fe…
Wide-band-gap semiconductors have numerous applications in electronic and optoelectronic devices. Progress is currently hampered by a lack of control over electrical conductivity: for instance, ZnO is typically n-type conductive, the cause of which has been widely debated. A first-principles investigation, based on de…
In this paper we present an identification scheme for diatoms using visual human-interpretable features. Diatoms are unicellular algae found in water and other places wherever there is humidity and enough light for photosynthesis. The automatic identification of diatoms has applications in a number of areas, for examp…
The elastic properties of SrTiO3 are investigated as function of temperature within an anharmonic electron‐phonon interaction model.. Pronounced zone boundary acoustic mode softening with decreasing temperature is observed, which is accompanied by giant elastic instabilities and the formation of microdomains. In the i…
New series of ferroelectric liquid crystalline materials containing two chlorine atoms as lateral groups on the aromatic rings of the core unit have been synthesised. The compounds with one chiral centre exhibit the blue phase, cholesteric phase, and the monotropic ferroelectric SmC* phase. The SmA and SmC* phases wer…
The selective catalytic reduction of nitric oxide with hydrocarbons in an oxygen-containing simulated flue gas has been investigated for a series of copper oxide and cerium oxide alumina supported catalysts at 600–775 K. The activity of these catalysts for the reduction of NO by methane or propane has been investigate…
Although important properties such as strength, toughness, and weldability can be easily measured in the laboratory, there is no generally accepted laboratory test for determining the atmospheric corrosion resistance of low-alloy weathering steels. Because many years of outdoor testing are needed to develop corrosion…
The Department of Energy mandated the termination of the Integral Fast Reactor (IFR) Program, effective October 1, 1994. To comply with this decision, Argonne National Laboratory-West (ANL-W) prepared a plan providing detailed requirements to maintain the Experimental Breeder Reactor-II (EBR-II) in a radiologically an…
The purpose of the present work is to highlight a number of recent experimental results that have contributed significantly to the research area of star polymer. Firstly we will refer to a very impressive SANS work by J.Peyrelasse, C.Perreur, J.
The aim of the present study is to obtain new TiAl-base alloys that are more resistant to foreign object damage (FOD). Ballistic impact tests were performed on TiAl alloys under the conditions closely simulating those in the turbine wheel of an automotive turbocharger. Several parameters including impact velocity, thi…
Type specimens of the nine Pleurosigma taxa described by A. Mann (1925) from the Philippine Islands were critically re-investigated as a result of a loan of these slides held in the Albert Mann collection at the United States National Museum, Smithsonian Institution, Washington, D.C., (USNM). Improved photomicrographi…
Pseudoelasticity of shape memory alloy (SMA) has attracted great attention in passive vibration control of structures due to its large energy dissipation. In this paper, a first-order differential equation—based versatile model to describe the constitutive relation of the pseudoelasticity of SMA is presented. In this…
Development and Validation of a Mathematical Model for the Chemical Vapor Deposition of Silica from Mixtures of Chlorosilanes, Carbon Dioxide, and Hydrogen , Nitodas, Stephanos F., Sotirchos, Stratis V.
The correlation between subsize and full-size Charpy impact properties of reactor pressure vessel steels have been investigated using 1/3 and 1/4 subsize specimens cut from the broken halves of full-size specimens irradiated to 2.7 × 1023 n m-2 (E>lMeV) at 288 °C. We found that ductile-to-brittle transition tem…
Much work over the last 10 years has focused on composites that exhibit a change in composition and structure over a nanometer length scale. Layered silicates like montmorillonite(MMT) dispersed as a reinforcing phase in a polymer matrix are one of the most important forms of such organic inorganic nanocomposites to a…
Previous work has shown that lithium mica glass-ceramics were excellent potential candidates as dental ceramics. The purpose of this study was to evaluate the effect of various additives on the microstructure and thermal properties of a mica glass-ceramic in the system Li(2)O-K(2)O-SiO(2)-MgO-F. Five glass composition…