Materials Literature
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The successful transfer of nanoparticles between solvents is critical for many applications. We evaluated the impact of amphiphilic polymer composition on the size, transfer efficiency, and biocompatibility of tri-n-octylphosphine oxide/hexadecylamine-stabilized semiconductor ZnS-capped CdSe and CdS-capped CdTe(x)Se(1…
We consider long and narrow spin valves composed of a first magnetic layer with a single domain wall (DW), a normal metal spacer and a second magnetic layer that is a planar or a perpendicular polarizer. For these structures, we study numerically DW dynamics taking into account the spin torques due to the perpendicula…
In this work, we present the formation and characterization of a quaternary (pseudo ternary) icosahedral quasicrystal in Al65Ga5Pd17Mn13 alloy. The X ray diffraction and transmission electron microscopy confirmed the formation of icosahedral B2 type and O crystalline (orthorhombic structure) phases in as cast alloy. T…
A continuous online technique based on electric cell-substrate impedance sensing (ECIS) was demonstrated for measuring the concentration and time response function of fibroblastic V79 cells exposed to nanomaterials such as quantum dots (QDs) and fluorescent gold nanoparticles. The half-inhibition concentration, (ECIS5…
In the present study, low-temperature synthesis of (Cu Fe)Al2O4 and (Cu Cr Fe)Al2O4 spinels from the quasicrystalline phases was investigated with the variation of process parameters during milling and annealing. The milling of the quasicrystalline materials was carried out in an attritor mill at 400 rpm for 40 hours…
There are few reports on the physiological effects of metal nanoparticles (nps), especially with respect to their functions as scavengers for superoxide anion radical (O2(.-)) and hydroxyl radical (.OH). We tried to detect the scavenging activity of Pt nps using a hypoxanthine-xanthine oxidase system for O2(.-) and us…
We show that covalent functionalization of carbon nanotubes (CNTs) via 1,3-dipolar cycloaddition is a powerful method for enhancing the ability to process CNTs and facilitating the preparation of hybrid composites, which is achieved solely by mixing. CNTs were functionalized with phenol groups, providing stable disper…
Au- and Ag-ZnO composite nanocrystals having a dumbbell-like structure were successfully synthesized through the nucleation and decomposition of zinc hydroxide at the surface of pre-existing Au and Ag nanoparticles, respectively. The average size of the Au and Ag nanoparticles used was ∼4 nm and that of the ZnO nanocr…
Equilibrium swelling is a feasible and simple experiment to determine the cross-link density of networks. It is the most popular and useful approach; however, in most of the cases, the given values are highly uncertain if not erroneous. The description of the complex thermodynamics of swollen polymer networks is usual…
Varying amount of Bi2O3 excess Bi3.25La0.75Ti3O12 (BLT) ceramics were prepared by solid state reaction and BLT thin films were fabricated on Pt/TiO2/SiO2/Si using RF magnetron sputtering method. The effect of Bi2O3 excess content on the microstructure and ferroelectric properties of the BLT ceramic and thin film was i…
Relaxation times in KH 3 (SeO 3 ) 2 crystals were measured as functions of temperature. There are no significant changes in T 1 for 1 H and 39 K nuclei at T C , except for a change in the number of proton and potassium signals. The role of structural changes in this transition is relatively minor. The transition is dr…
We formed BoFeO3 (BFO) thin films by chemical solutions deposition on Pt/Ti/SiO2/Si(100) structures and achieved low leakage current density at room temperature. The XPS spectrum confirmed that the valance state of Fe in our BFO thin films was mainly Fe3+, which is associated with low leakage current density in BFO th…
BaTiO3 films were deposited by the direct vapor deposition (DVD) technique to prepare thin dielectric layers for multilayer ceramic chip capacitors (MLCCs). The BaTiO3 films were successfully prepared by co-evaporation of the BaTiO3 ceramic and Ti metal source. The films deposited at room temperature and 600°C were am…
We study the effect of non-Markovian reservoirs on the heat conduction properties of short to intermediate size molecular chains. Using classical molecular dynamics simulations, we show that the distance dependence of the heat current is determined not only by the molecular properties, rather it is also critically inf…
A magnetoelectric (ME) laminate composite consisting of a ferroelectric Pb(Fe0.52Nb0.48)O3-PbTiO3 (PFNT) single crystal and two magnetostrictive Tb1-xDyxFe2-y (Terfenol-D) layers has been developed and its ME voltage coefficients (α E ) depending on different magnetic bias fields and various frequencies have been stud…
Scanning tunneling microscopy and spectroscopy were conducted over a broad temperature range on single crystals of Pr 0.68 Pb 0.32 MnO 3 . Spectroscopic studies revealed inhomogeneous maps of the zero-bias conductance with a broad distribution of the local conductivities only within a narrow temperature range close to…
The crystal structure and the local atomic order of a series of nanocrystalline ZrO 2 –CaO solid solutions with varying CaO content were studied by synchrotron radiation X-ray powder diffraction and extended X-ray absorption fine structure (EXAFS) spectroscopy. These samples were synthesized by a pH-controlled nitrate…
Magnetic and transport properties of ${\text{La}}_{0.7}{\text{Ca}}_{0.3}{\text{Mn}}_{1\ensuremath{-}x}{M}_{x}^{\ensuremath{'}}{\text{O}}_{3}$ $({M}^{\ensuremath{'}}=\text{Al},\text{Ti})$ are studied. The dilution of the Mn network results in a weakening of the ferromagnetism, a deterioration of the metallic conductivi…
We present an exhaustive study on tunneling and electrical conduction in an electrically biased GaAs-Al(y)Ga(1-y)As generalized Fibonacci superlattice. The study is based on transfer matrix formalism using an Airy function approach and provides an exact calculation of the current density in the case of quasi-periodic…
Electron emission from collisions of ${\mathrm{C}}^{3+}$ ions ($22.7\text{ }\text{ }A\text{ }\mathrm{MeV}$) with carbon foils (21, 49 and $90\text{ }\text{ }\ensuremath{\mu}\mathrm{g}/{\mathrm{cm}}^{2}$) was studied by the time-of-flight method. Two prominent emission patterns can be readily identified as ``binary enc…