Materials Literature
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Stoichiometric NiO, a Mott-Hubbard insulator at room temperature, shows p-type electrical conduction due to the introduction of Ni(2+) vacancies (V(Ni)('')) and self-doping of Ni(3+) ions in the presence of excess oxygen. The electrical conductivity of this important material is low and not sufficient for active devic…
A compact analytical formula up to the order of k3, where k is a wave vector, is derived for the depolarization field Ed of a spheroidal particle by performing explicitly the steps of the recipe outlined by Meier and Wokaun [Opt. Lett.8, 581 (1983)]. For the static component of Ed a general electrostatic formula valid…
Many advances in the understanding of radiation damage to protein crystals, particularly at cryogenic temperatures, have been made in recent years, but with this comes an expanding literature, and, to the new breed of protein crystallographer who is not really interested in X-ray physics or radiation chemistry but jus…
The internalization and biocompatibility of iron oxide nanoparticles surface functionalized with four differently charged carbohydrates have been tested in the human cervical carcinoma cell line (HeLa). Neutral, positive, and negative iron oxide nanoparticles were obtained by coating with dextran, aminodextran, hepari…
Given the intensive application of nanoscale zinc oxide (ZnO) materials in our life, growing concerns have arisen about its unintentional health and environmental impacts. In this study, the neurotoxicity of different sized ZnO nanoparticles in mouse neural stem cells (NSCs) was investigated. A cell viability assay in…
A gold nanoparticle (AuNP)-capped mesoporous silica nanosphere (MSN)-based intracellular drug delivery system (PR-AuNPs-MSN) for the photoinduced controlled release of an anticancer drug, paclitaxel, inside of human fibroblast and liver cells was synthesized and characterized. We found that the mesopores of MSN could…
We present a method for the evaluation of the average size of gold nanoparticles based on the fitting of their UV−vis spectra by the Mie model for spheres. The method gives good results using a calibration of the dumping frequency of the surface plasmon resonance and accounting for the presence of nonspherical AuNP in…
The effect of pyrolysis atmosphere is investigated for Bi 3.25 La 0.75 Ti 3 O 12 (BLT) films prepared on Pt/TiO 2 /SiO 2 /p-Si(100) substrates by sol-gel processes. The pyrolysis is carried out at 400° C for 20 min under air or O 2 atmosphere and the successive anneal is performed at 700° C for 30 min under O 2 atmosp…
Ce-doped YAG (Y3−x Al5O12:xCe, YAG:Ce) phosphor were prepared by co-precipitation method using ammonium hydrogen carbonate as a precipitant. The influence of precipitation condition such as pH on the powder properties and the optimum Ce content in YAG:Ce were investigated. Throughout the experiment, phase pure YAG:Ce…
Abstract The purpose of this article is to study how processing parameters can promote adhesion in grafted polypropylene/aluminum laminates made by extrusion coating. The density of bonds created at the interface is quantified by X‐ray spectroscopy after dissolution of the polymer film. dynamic mechanical analysis (DM…
Effects of film thickness on interfacial barrier have been studied for the La0.67Ca0.33MnO3/SrTiO3:Nb and La0.67Sr0.33MnO3/SrTiO3:Nb junctions. In addition to the evolution of the transport behavior from electron tunneling to thermionic emission, increase in film thickness from ∼5 to ∼50 nm causes a significant growth…
The phase behavior of N, N′-bis(3,4,5-trihexadecyloxyphenyl)urea (1) was investigated by differential scanning calorimetry, polarized optical microscopy, and X-ray diffraction. It was found that 1 exhibited two columnar phases, rectangular columnar and hexagonal columnar phases. The switching current peak (Ps ≈ 600nC/…
A high resolution pair-distance distribution function P(r) of protein molecules has been obtained from the complete solution scattering curve made by combining accurate small-angle and wide-angle x-ray scattering data out to 2.15 Å resolution. Both indirect and direct Fourier transforms exhibit two distinct peaks at 1…
Twisted nematic (TN) liquid crystal (LC) cells doped with carbon nanotubes (CNTs) were fabricated and their electro-optic characteristics were studied. The CNTs with a minute amount of doping did not disturb the liquid crystal orientation in the off and on state. Effects of CNTs on voltage-dependent transmittance curv…
We studied the anisotropy of the influence of plasmonic fields, arising from the optical excitation of a gold nanoshell plasmon absorption at 770 nm, on the lifetime of the bandgap state of the CdTe core in vertically aligned CdTe-Au core-shell nanorods. The previously observed decrease in the lifetime was studied as…
A block copolymer containing an azobenzene (Az) moiety in the side chain was prepared by atom transfer radical polymerization (ATRP). For comparison, a random copolymer with a similar Az content was also designed. Their photoresponsive and holographic behavior was investigated in thin films. The block copolymer film s…
Abstract A detailed study of the effects of the concentration of some lanthanide(III) complexes [LnDO2A + ; DO2A = 1,7‐bis(carboxymethyl)‐1,4,7,10‐tetraazacyclododecane] on the hydrolysis of the phosphodiester bond of the compound BNPP [sodium bis(4‐nitrophenyl)phosphate] is reported at 25 °C and pH 7.90 (Ln = Eu), 9.…
A nano-sized ZnGa2O4 phosphor was synthesized via a precipitation method (at a low temperature) and then sintered at various temperatures. X-ray diffraction (XRD) analysis confirmed that single-crystalline ZnGa2O4 particles were formed. A pure ZnGa2O4 phase was obtained at a sintering temperature of 1000°C. Theaverage…
Electronic and optical properties of CdZnO/MgZnO quantum well (QW) structures with the depolarization of an internal field are investigated by using the non-Markovian gain model. The Mg composition is selected to give zero internal field for a given Cd composition. The Mg content to give zero internal field is found t…
Niobium-doped ZnO (NZO) transparent conductive films are deposited on glass substrates by rf sputtering at 300° C. Effects of sputtering power on the structural, morphologic, electrical, and optical properties of NZO films are investigated by x-ray diffraction (XRD), field emission scanning electron microscopy (FESEM)…