Materials Literature
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We report, for the first time, experimental evidence for the nature of atomic defects with different sizes in glass and crystalline phase of Ge–Te alloys using positron lifetime spectroscopy. The obtained positron lifetime results have been correlated with the size of the open volume (cavities) defects. We provide dir…
Ab initio calculations using plane wave pseudopotential method within density funtional theory are applied to investigate mechanical and electronic properties of Al-terminated Me(1 1 1)/Al2O3(0 0 0 1) (Me = Al, Ag, Cu, Nb) interfaces. Stress–displacement relationships of separation perpendicular to the interface are c…
PURPOSE: In this study, the suitability of amide proton transfer (APT) imaging as a biomarker for the characterization of high intensity focused ultrasound (HIFU)-treated tumor tissue was assessed. METHODS: APT imaging was performed on tumor-bearing mice before (n = 15), directly after (n = 15) and at 3 days (n = 8) a…
The influence of compressive strain on the deformation of GaAs nanoparticles embedded in different host matrices is investigated. The simulation results indicate that it can be easier to deform GaAs nanoparticles grown in an Al2O3 film than those in an SiO2 film. The deformation induced by the applied compressive stra…
Magnetic properties of polycrystalline La1−xCaxCoO3 (0.10≤x≤0.25) are systemically studied in this work. It is found that all the samples exhibit the ferromagnetic states at low temperatures with two ferromagnetic transitions. A detailed analysis on their magnetic susceptibilities reveals that the Co ions of those com…
Kristallklar: Über Veränderungen der Ladungsträgerdichte auf dotierten Halbleiternanokristallen lassen sich lokale chemische Vorgänge verfolgen. Redox- und Ligandenprozesse bewirken beispielsweise Änderungen in der Leerstellendichte von Kupfer(I)-sulfid-Nanostäben, durch die sich die lokalisierte Oberflächenplasmonenr…
The internal flexibility and interacting ability of PAMAM-dendrimers having 4-carbomethoxypyrrolidone-groups as surface groups (termed Gn-Pyr), which may be useful for biomedical purposes, and ion traps were investigated by analyzing the EPR spectra of their copper(II) complexes. Increasing amounts (with respect to th…
The size and temperature dependence of the pure-dephasing processes involved in luminescence, multiple exciton generation (MEG), and multiple exciton fission (MEF) are investigated for Sin clusters (n = 5-10, 15) using ab initio molecular dynamics and optical response function theory. The cluster bandgaps correlate wi…
We have studied the electronic structures and magnetism of SrFeO2 under pressure by first-principles calculations in the framework of density functional theory (DFT) with GGA+U and HSE06 hybrid functionals, respectively. The pressure-induced spin transition from S = 2 to S = 1 and the antiferromagnetic-ferromagnetic (…
To reduce the toxic effect on normal cells and improve the treatment effects of docetaxel, a novel transferrin modified docetaxel-loaded long circulating liposome for ovarian tumor was established for the first time. The transferrin-modified long-circulating liposomes loaded with docetaxel (TF-LP-DOC) were prepared by…
The hydrogen storage system [MgH2–2LiBH4] shows attractive properties such as favorable thermodynamics, high hydrogen capacity and reversibility. However, there exists an incubation period that amounts up to 10 hours in the dehydrogenation steps, which restricts this system as a practical material. In this study, the…
Two stress relaxation constitutive models have been developed to predict the stress relaxation behavior for high-temperature bolting according to continuum damage mechanics, Kachanov–Robatnov (K–R), and Othman–Hayhurst (O–H) creep constitutive equations as well as stress relaxation strain equations. To validate the ef…
Reducing the stiffness of titanium is an important issue to improve the behavior of this material when working together with bone, which can be achieved by generating a porous structure. The aim of this research was to analyze the porosity and mechanical behavior of Ti-6Al-4V porous samples developed by spherical powd…
A solid-state electrochromic device using 3-D conducting fluorinated tin oxide nanobeads (roughness factor >500) as electrodes enables fast electron transport and concentrates the voltage drop at the interfaces. This method reduces the driving voltage to 0.9 V and the response time to ∼272 ms, far exceeding the perfor…
A novel one-step approach for designing nonaggregated silica-based mesostructured therapeutic vectors is presented. Evaporation-induced self-assembly was used in combination with amphiphilic drugs for preparing already loaded class I and class II hybrid materials containing from 50 to 60 wt % (up to 75 vol %) of three…
Pair distributions of fluids confined between two surfaces at close distance are of fundamental importance for a variety of physical, chemical, and biological phenomena, such as interactions between macromolecules in solution, surface forces, and diffusion in narrow pores. However, in contrast to bulk fluids, properti…
We have prepared BiFe0.95Ni0.05O3 by the standard solid-state reaction and rapid sintering. The structural analysis by x-ray diffraction for BiFe0.95Ni0.05O3 shows rhombohedral perovskite structure (R3c), and lattice constants a and c of BiFe0.95Ni0.05O3 are slightly increased as compared to those of BiFeO3. The Raman…
Abstract Regioselective ring opening of 1,2‐epoxyhexane with methanol can be catalyzed by Co III –salen complexes, whereas related Co II complexes are inactive species in this and other epoxide ring‐opening reactions. In this work, Co–salen complexes supported on a highly cross‐linked polymer resin are synthesized, ch…
Hyper-branched polyester polyols (HBPs) comprised of 2,2-dimethyolpropionic acid (DMPA) were treated with cinnamoyl chloride to give the corresponding polycinnamates (DCi20, DCi30 and DCi40) in order to compare their spectroscopic and photochemical properties with those of poly(vinyl cinnamate) (PVCi) as a linear coun…
Anisotropic waveguide theory is developed for electrically tunable distributed feedback (DFB) laser from dye-doped holographic polymer dispersed liquid crystal (HPDLC) grating. The period grating structure, optical anisotropy of the liquid crystal (LC) and practical light propagation path in the HPDLC have been consid…