Materials Literature
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This study introduces a new train of thought regarding the growth of well-arrayed nanowires. To reduce how defects such as grain boundary affect subsequent growth of the nanowires, the epitaxial buffer layer should be carefully chosen. The titanium nitride (TiN) buffer layer facilitates the growth not only of the arra…
We have developed carbon nanotube (CNT) vias consisting of about 1000 tubes. The total resistance of the CNT via was measured as three orders of magnitude lower than the current flows in parallel through about 1000 tubes. There is no degradation observed for 100 hours at the via current density of 2/spl times/10/sup 6…
Abstract The cluster compounds K 10 Zn 4 Sn 4 S 17 , K 10 Mn 4 Sn 4 S 17 , K 10 Fe 4 Sn 4 S 17 , K 10 Co 4 Sn 4 S 17 , Cs 10 Cd 4 Sn 4 S 17 and K 10 Zn 4 Ge 4 S 17 are described. The structures of these compounds, refined by single‐crystal X‐ray diffraction techniques, contain the discrete cluster [M 4 M′ 4 S 17 ] 10‐…
Abstract A multistage scheme has been developed for the structure prediction of viable clusters, where a genetic algorithm is implemented within the first stage to generate approximate structures that can be refined via direct energy minimisation techniques in a later stage. Inclusion and exclusion zones, regions of s…
Molecular beam scattering techniques were employed to investigate the adsorption/reaction of NO with an atomic oxygen covered Au(111) surface to form nitrogen dioxide, NO 2 . Results suggest that at temperatures above T s ≈ 200 K, the NO 2 production is limited by NO surface lifetime on O/Au(111); at temperatures belo…
The electronic structure and dielectric screening of finite-length armchair carbon nanotubes are studied in view of their technical applications. For this purpose, a self-consistent tight-binding method, which captures the periodic oscillation pattern of the finite band gap as a function of tube length, is applied. We…
We have synthesized thin multiwalled carbon nanotubes (t-MWNTs) using a catalytic chemical vapor deposition (CCVD) method with FeMoMgO catalyst. The number of tube walls were 2∼6 with the corresponding diameters of 3∼6 nm. We obtained high production yield of over 3000 wt % compared to the weight of the supplied catal…
Abstract Summary: The pyrazinoquinoxaline‐based conjugated polymers poly(2,7‐diphenylpyrazino(2,3‐ g )quinoxaline‐3,8‐diyl‐1,4‐phenylene) (PZQP) and poly(2,7‐diphenylpyrazino(2,3‐ g )quinoxaline‐3,8‐diyl‐2,5‐thiophene) (PZQT) have been synthesized and characterized. PZQP and PZQT have optical band gaps of 2.44 and 1.7…
Abstract Correlations among the three components, δ d 2 (dispersion), δ h 2 (hydrogen‐bonding), and δ p 2 (polar) that make up the Hansen solubility parameter equation, δ o 2 = δ d 2 + δ h 2 + δ p 2 , have been analyzed for a large number of organic solvents. A relationship is found that enables δ h and δ p to be esti…
The $\mathrm{Sr}$ and $\mathrm{SrO}$ monolayers on $\mathrm{Si}(001)$ and the ${\mathrm{SrTiO}}_{3}∕\mathrm{Si}(001)$ interface have been simulated by means of total energy minimization within the density functional theory formalism and the generalized gradient approximation form of exchange-correlation potential. It…
The amphiphilic and self-polymerizable monomer 1,8-dihydroxymethyl-1,3,5,7-octatetrayne (DHMOTY) was prepared and dispersed in water by itself or with the help of phenyl trimethylamine hydroxide. Accordingly, cross-linked poly(1,8-dihydroxymethyl-1,3,5,7-octatetrayne) (polyDHMOTY) nanospheres were produced due to spon…
Au(2)H(-) was recognized and confirmed as a minor contamination to typical photoelectron spectra of Au(2) (-), produced by laser vaporization of a pure Au target using an ultrahigh purity helium carrier gas. The hydrogen source was shown to be from trace H impurities present in the bulk gold target. Carefully designed…
Abstract Recent developments in the field of solid state synthesis have given us access to synthesis conditions that range from effective negative pressures of about ‐1 GPa to high positive values exceeding 10 or even 100 GPa. Thus, it becomes necessary to explore not only the landscape of potential energy, but also t…
ADVERTISEMENT RETURN TO ISSUEPREVNoteSuperhydrophobic, High Surface Area, 3-D SiO2 Nanostructures through Siloxane-Based Surface FunctionalizationShufen Tsoi, Enrico Fok, Jeremy C. Sit, and Jonathan G. C. VeinotView Author Information Department of Electrical and Computer Engineering, University of Alberta, Edmonton,…
Ge 2 Sb 2 Te 5 film was deposited by RF magnetron sputtering on Si (100) substrate. The structure of amorphous and crystalline Ge 2 Sb 2 Te 5 thin films was investigated using XRD, Raman spectra and XPS. XRD measurements revealed the existence of two different crystalline phases, which has a FCC structure and a hexago…
The enzymatic degradation of poly( d, l -lactide) (PLA), poly(ε-caprolactone) (PCL), and their blends by Novozym 435 was studied in toluene at 60 °C. Both of the polymers were found to degrade by specific chain end scission. A model based on the continuous distribution kinetics was developed to determine the rate coef…
Abstract Summary: Mussel protein can serve as a strong and water‐resistant adhesive, but is expensive and not readily available. Soy protein is inexpensive, abundant, and readily available, but is a poor adhesive. Mussel protein contains a high amount of mercapto‐containing cysteine. This study revealed that increasin…
The way fluids flow into and fill nanotubes is of wide interest; however, there are currently no experimental data or validated theoretical models for this nanoscale process. We have carried out molecular dynamics simulations of carbon nanotubes imbibing oil at an oil/vapor interface at 300 K. We find that the smalles…
An 8Mb Non-Volatile Memory Demonstrator incorporating a novel 0.32 /spl mu/m/sup 2/ Phase-Change Memory (PCM) cell using a Bipolar Junction Transistor (BJT) as selector and integrated into a 3V 0.18 /spl mu/m CMOS technology is presented. Realistically large 4Mb tiles with a voltage regulation scheme that allows fast…
The chemical adsorption of H atoms on an (8,0) zigzag boron nitride nanotube is studied using the density functional theory with the supercell method. One to four H atoms per 32 B and 32 N are considered. The results show that H atoms prefer to adsorb on the top sites of adjacent B and N atoms to form an armchair chai…