Materials Literature
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Transmission electron microscopy has been used to investigate the (1100) and (1103) inversion domain boundaries in a ZnO film prepared by molecular beam epitaxy. The inversion domain was revealed by dark-field images and confirmed by convergent-beam electron diffraction. Interacting with a (0002) stacking fault, the i…
Extended abstract of a paper presented at Microscopy and Microanalysis 2007 in Ft. Lauderdale, Florida, USA, August 5 – August 9, 2007
Highly compact (99%) solid electrolyte Ce0.8Gd0.2O1.9 with submicron (0.3 μm) grains is synthesized. The dilatometric (20–850°C) and conductivity (180–350°C) measurements are performed on the electrolyte in air and as a function of the partial oxygen pressure $$p_{O_2 } $$ (0.21−1×10−25 atm) at 600, 700, and 800°C. An…
OF SODIUM ALGINATE FILMS The effects of sorbitol and formaldehyde on the morphology, water absorption and mechanical properties of sodium alginate films were analyzed. The morphology of the films indicated the presence of small aggregates in the surface of uncrosslinked films, which disappeared with the crosslinking p…
Nanostructured silver films were deposited on polypropylene (PP) nonwovens by RF magnetron sputter coating to obtain the antibacterial properties. Shake flask test was used to evaluate the antibacterial properties of the materials. Atomic force microscope (AFM) was utilized to observe the surface morphology. Energy-di…
Insoluble glucans synthesized by Streptococcus mutans enhance the pathogenicity of oral biofilm by promoting the adherence and accumulation of cariogenic bacteria on the surface of the tooth. The objective of this study was to investigate the effect of Leuconostoc spp. on the in vitro formation of S. mutans biofilm. T…
We present a zero-power magnetic levitation technique using a composite of magnetostrictive and piezoelectric materials. The composite is bonded to iron yokes with an attached permanent magnet, by which the magnetic force exerted on movable yoke via air gap is controlled by the applied voltage on the piezoelectric mat…
In this letter, a post-CMOS selectively grown porous silicon (SGPS) technique is proposed to improve theQ-factor of the integrated inductor. The inductors are fabricated in a standard RF CMOS process, and porous silicon layers are selectively grown after processing from the backside of the silicon wafer. For a 2.1-nH…
Low-temperature optical characterization of single quantum nanostructures can reveal detailed information on structure-dependent properties of these materials. We describe the development of a unique laser-scanning optical microscope capable of low-temperature single molecule/particle imaging and spectroscopy. Making…
Poly(methyl methacrylate) beads were hybridized with Y 3 Al 5 O 12 :Ce 3+ nanoparticles through electrostatic interactions using the layer-by-layer adsorption technique to prepare fluorescent beads for biological application. The subsequent sequential adsorption of poly(sodium 4-styrenesulfonate) and poly(allylamine h…
A thin film of trimethylammonium-exchanged perovskite-type niobate ((CH 3 ) 3 NHSr 2 Nb 3 O 10 ) was prepared by casting its exfoliated aqueous dispersion onto a glass substrate. The electric conductivity of a film (3−9 μm thick) was measured in vacuum under the illumination of light (280∼450 nm). Photocurrent raised…
A moving bed scale reactor setup for studying complex gas-solid reactions has been designed in order to obtain kinetic data for scale-up purpose. In this bench scale reactor setup, gas and solid reactants can be contacted in a cocurrent and countercurrent manner at high temperatures. Gas and solid sampling can be perf…
We have analyzed thermal unwinding behavior of a biologically relevant collagen mimetic peptide (PDB ID: 1bkv) through molecular dynamics simulations in explicit water.Conformational changes of the triple helix were monitored by introducing a set of local triad vectors and measuring variations in their torsional angle…
It is shown and explained in detail by four examples generated from known kinetic models that simplified evaluation procedures--initial rate studies, individual exponential curve fitting method--may inherently lead to inappropriate chemical conclusions, even in the case of relatively simple kinetic systems. It is also…
In the recent years, many researchers have been interested in nanoparticles because of their unique properties. In this study, a method for producing ZnO nanoparticle colloids is proposed. The colloids were characterized by spectroscopic analyzer. By absorption spectrum study, we found out that colloids were consisted…
The roles of different point defects in persistent luminescence of SrAl2O4:Eu, Dy phosphors were investigated. The research results showed that Dy*Sr plays an important role in the persistent luminescence of SrAl2O4:Eu, Dy phosphors. It can serve as the electron trap of suitable depth for persistent luminescence. Vö d…
La x Bi1−x FeO3(x = 0, 0.03, 0.06, 0.1, 0.2, 0.3, 0.5, 1) powders and thin films have been prepared by a conventional ceramic processing technique, and their mass magnetization and magnetic susceptibility have been measured at temperatures from 77 to 1000 K. The electron density distribution in BiFeO3 and antiferromag…
Hexagonal boron nitride (h-BN) based ceramics have been fabricated by hot-pressing in a nitrogen atmosphere at 1900°C for 60 min. under a pressure of 50 MPa with B2O3 as sintering additive. The phase composition was confirmed by XRD. The microstructural properties of h-BN powders and hot-pressed surfaces were evaluate…
Size-dependent elastic properties of Ni nanofilms are investigated by molecular dynamics (MD) simulations with embedded atom method (EAM). The surface effects are considered by calculating the surface relaxation, surface energy, and surface stress. The Young's modulus and yield stress are obtained as functions of thic…
Abstract Water‐induced crystallization of polycarbonate (PC) was investigated in water‐saturated supercritical CO 2 (scCO 2 ) in the range of 80–160°C and 12–20 MPa, with the help of differential scanning calorimetry and wide‐angle X‐ray diffraction. Compared with pure scCO 2 , the enhanced plasticizing effect of wate…