Materials Literature
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We develop a Landau theory for bend flexoelectricity in liquid crystals of bent-core molecules. In the nematic phase of the model, the bend flexoelectric coefficient increases as we reduce the temperature toward the nematic to polar phase transition. At this critical point, there is a second-order transition from high…
The objective of this study was to evaluate the in vitro antioxidant activity of high molecular weight chitosan based films. Three kinds of water-soluble quaternized chitosans with high molecular weight, namely N-(2-hydroxyl) propyl-3-trimethyl ammonium chitosan chloride (400-HTCC and 1240-HTCC), N-(2-hydroxyl) propyl…
Growing oxide shells on seed nanoparticles requires the control of several processes: (a) the nucleation and growth of the shell material; (b) the "wetting" of the shell material on the seeds; and (c) the aggregation of the nanoparticles. These processes are influenced by a number of factors, many of which are related…
Abstract Half‐Heusler n‐type thermoelectric materials MNiSn (M = Hf, Zr) have been shown to exhibit peak thermoelectric dimensionless figure‐of‐merit ( ZT ) of ∼1.0 at 600–700 °C with a composition of Hf 0.75 Zr 0.25 NiSn 0.99 Sb 0.01 . This work demonstrates that it is possible to achieve the same ZT by reducing the…
In this study, we design a homogeneous system consisting of Ag nanoprisms and glucose oxidase (GOx) for simple, sensitive, and low-cost colorimetric sensing of glucose in serum. The unmodified Ag nanoprisms and GOx are first mixed with each other. Glucose is then added in the homogeneous mixture. Finally, the nanoplat…
A facile solvothermal method is reported to synthesize highly photoluminescent Ag 2 Se quantum dots (QDs) with emission at 1300 nm in the second near-infrared window. After surface modification of C18-PMH-PEG, the Ag 2 Se QDs possess bright photoluminescence, good water-solubility, high colloidal stability and photost…
A suitable technology for the preparation of graphene based on versatile wet chemistry is presented for the first time. The protocol allows the wet chemical synthesis of graphene from a new form of graphene oxide that consists of an intact hexagonal σ-framework of C-atoms. Thus, it can be easily reduced to graphene th…
Abstract A series of polycrystalline samples of Ba 1‐x Sr x SnO 3 is prepared by solid state reaction of stoichiometric mixtures of SrCO 3 , BaCO 3 , and SnO 2 (1.
We report high-energy synchrotron X-ray diffraction spectrum and high-temperature magnetic data for multiwalled carbon nanotubes (MWCNTs) embedded with Fe and Fe3O4 nanoparticles. We unambiguously show that the saturation moments of the embedded Fe and Fe3O4 nanoparticles are enhanced by a factor of about 3.0 compared…
An osmotin (CpOsm) from the latex of Calotropis procera has been crystallized in both tetragonal and trigonal forms suitable for structure determination. Crystallographic studies of CpOsm are of great interest because limited information is available concerning the structure of latex proteins and CpOsm has previously…
Abstract A trisilicate with a new structure type, CoEu 2 Si 3 O 10 , was obtained from molybdate–carbonate mixtures in Pt crucibles by using a high‐temperature flux‐growth method. The structural characterization of CoEu 2 Si 3 O 10 was done by evaluation of single‐crystal X‐ray diffraction data collected at three diff…
Within this work High Temperature Single Impact Studies were performed to evaluate deformation mechanisms at different energy and momentum levels. To show the influence of different microstructures and hardness levels and their response to single impacts four different materials were tested at various temperatures up…
The common use of Rowan wood (Sorbus aucuparia Lipsky) in the forest products industry of Turkey, was evaluated for some of the combustion properties after impregnation with various chemical materials. For this purpose, the wood test samples prepared from Rowan wood materials according to TS 345 were treated with Tana…
Silica-carbon composite samples containing various carbon contents deposited within a silica gel matrix were synthesized. The composites were evaluated as nitrogen dioxide adsorbents at ambient conditions in either wet (70% RH) or dry air streams. The surface chemistry and textural features of the initial and exposed…
One of the most important properties of the recently discovered “rods-in-belt” supramolecular complexes containing Au–Cu or Au–Ag cluster cores is the possibility of tuning their electronic and photophysical properties through modification of the ligand environment. This opens great perspectives for their applications…
OBJECTIVE: Small-caliber expanded polytetrafluoroethylene (ePTFE) grafts cannot be used widely in the clinical situation because of early thrombosis and occlusion. This unsolved and under-recognized problem warrants further investigation. METHODS: Grafts of uncoated ePTFE (n = 6) and anti-CD34-coated ePTFE (n = 6) wer…
Abstract This work reports the first drug nanodelivery system based on polyelectrolyte complexes (PECs) between chitosan (CH) and dextran sulphate (DS), stable in physiological media surface and functionalised by antibodies for drug targeting. The formation of colloidal PECs occurred at room temperature, under moderat…
Abstract 3,7‐Dibromo‐10,15,20,25,30‐pentakis(pentafluorophenyl)hexaphyrin ( 3 ) and 3,7‐bis(triisopropylsilyl)‐10,15,20,25,30‐pentakis(pentafluorophenyl)hexaphyrin ( 4 ) were synthesized by a stepwise route, in which prefunctionalized dipyrromethane Sn 4+ complexes serve as key precursors. Hexaphyrins 3 and 4 have rec…
In the present contribution, four transition metal ferrites, namely the manganese perovskite MnFeO3 and the nickel, cobalt and zinc spinels NiFe2O4, CoFe2O4, and ZnFe2O4, were investigated through XPS (X-ray Photoelectron Spectroscopy). The synthesis route for the analyzed materials involved the precipitation of metal…
Pure and Mo-doped WO 3 films were formed on ITO-coated glass substrate held at 473 K by RF magnetron sputtering technique. The structural, morphological, and optical properties of pure and Mo-doped WO 3 thin films have been systematically studied. The structural properties revealed that the pure WO 3 films exhibited a…