Materials Literature
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The basics of precession electron diffraction (PED) in a transmission electron microscope (TEM) are briefly discussed. An automated system for the mapping of nanocrystal phases and orientations in a TEM is briefly described. This system is primarily based on the projected reciprocal lattice geometry as extracted from…
Magnetic nanowire arrays formed by templated electrodeposition are a promising way of making ultra-high density magnetic recording media. We have used both Poly Carbonate Track Etched (PCTE) and Anodic Aluminum Oxide (AAO) membranes to obtain Cobalt nanowires. Also by suitably adjusting the electrodeposition process,…
An update is presented on some recent syntheses of magnetic nanoparticles developed in our group for potential use in biomedical applications. Particular attention is paid to (i) the preparation of magnetic nanoparticles that are readily dispersed in aqueous solution (ii) the synthesis of alloy magnetic nanoparticles…
The endothelialization of an engineered microvascular network is constrained by the mass transport of the endothelial cells through high length-to-depth (l/d) aspect ratio microchannels. This paper presents a deformable, reentrant microvascular scaffold as a microelectromechanical systems (MEMS)-assisted approach for…
Under a compressive biaxial strain of ∼ 0.71%, Ge self-diffusion has been measured using an isotopically controlled Ge single-crystal layer grown on a relaxed Si0.2Ge0.8 virtual substrate. The self-diffusivity is enhanced by the compressive strain and its behavior is fully consistent with a theoretical prediction of a…
Various processes occurring in tungsten coatings deposited on composite substrates under ion irradiation have been analyzed. Processes leading to formation of radiation defects of a crystal lattice, helium and deuterium accumulation, and their thermodesorption from samples are compared. Possible mechanisms behind thes…
This paper describes an experimental procedure for growing self assembled Cu nanowires on a 4° miscut Si(001) substrate with and without the native oxide layer by the e-beam evaporation method. The physical characteristics of the Cu nanowires were observed using an in situ and ex situ scanning electron microscope (SEM…
Abstract The effects of vacancy defects on the thermal conductivity of Ge thin films were investigated by employing molecular dynamics (MD) simulations and theoretical analysis based on the Boltzmann equation. Both the MD and theoretical results show that the lattice thermal conductivity dramatically decreases with th…
The pineapple leaf fiber is abundant in the tropics and subtropics regions in the world. The raw pineapple leaf fiber needs to be degummed before spinning. In this paper, the effect of alkali treatment on fiber property was studied. Compared to the fiber that not treated by alkali, fiber property improved by alkali tr…
Developing a sustainable synthesis method to produce large-area, high-quality, uniform graphene films with controllable thickness is a challenge to many scientists and researchers around the world. Several reported graphene synthesis methods including exfoliation and cleavage, thermal chemical vapor deposition, therma…
Acrylamide can polymerize under the action of molecular chlorine in the temperature range 180–210 K, as evidenced by the methods of calorimetry; UV, IR, and EPR spectroscopy; and elemental analysis.
The electronic structure and x-ray magnetic circular dichroism (XMCD) spectra of the Heusler alloy Co2FeGa were investigated theoretically from first principles, using the fully relativistic Dirac linear MT-orbital (LMTO) band structure method. Densities of valence states, orbital and spin magnetic moments are analyze…
We studied three process modifications to investigate their effects on the property and yield recovery capabilities of kraft pulping integrated with hemicellulose pre-extraction of southern pine. Loblolly pine chips were pre-extracted with hot water until the sugar extraction yield reached the targeted value of 10% an…
Ce 2 [MoO 5 ][MoO 4 ] crystallizes monoclinically in space group P2 1/c (a = 2241.98(9), b = 712.95(3), c = 2044.19(8) pm, β = 116.936(2), Z = 16). Besides eight crystallographically different Ce 3+ cations with coordination numbers ranging from seven plus one to ten, its structure contains two isolated oxomolybdate(V…
This paper presents graphene nanoribbon (GNR) Schottky diode through an analytical approach. To achieve an analytical relation for channel current, first an analytical equation for potential distribution within the GNR is offered. Then by using the WKB approximation, transmission probability through Schottky barriers…
Rice husk silica (RHS) which was obtained with thermal treatment of rice husk has the size of approximately 10 micrometer with 4-5 nm pore. RHS can be mold to a disk type membrane. The membrane may have submicron pore originated from the space among the particles, and the nano pores of the rice husk silica (RHS pore).…
The paper discusses the correspondence between electromagnetic boundary conditions and interface conditions. In particular, the focus is on the synthetic approach where the interest is in finding material realizations for given boundary conditions. Material realizations are approximative but not unique because, especi…
This work studied the effect of nanoporous alumina in acute cellular response in an in vivo model. Nanoporous alumina membranes, with pore size diameters of 20 and 200 nm, were fabricated by anodic oxidation of aluminium. The membranes were thereafter characterized in terms of pore size distribution and chemical compo…
In order to prepare transparent hybrid films of high refractive index, nanoparticles of TiO2 were prepared and dispersed in a silicone epoxy (SE) resin synthesized from diphenyl silane diol and [2-(3,4-epoxycyclohexyl)ethyl] trimethoxysilane by sol-gel reactions. It was found that amorphous TiO2 nanoparticles of about…
We report the direct measurement of individual grain boundary (GB) resistances and the critical role of GB structure in the increased resistivity in copper nanowires. By measuring both intra- and inter-grain resistance with a four-probe scanning tunneling microscope, large resistance jumps are revealed owing to succes…