Materials Literature
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Results of X-ray diffraction (XRD), absorption spectra, and photoluminescence emission spectra are presented for CdS nanoparticles prepared by different techniques. These techniques included preparation of CdS nanoparticles in a liquid crystal state with H2S as well as by mixing two lamellar phases, sol-gel technique,…
In this work, an experimental X-ray Absorption Spectroscopy (XAS) measurement was employed to determine the local structure and valency of Cu and Mn in BiFeO3-BaTiO3. Synchrotron x-ray absorption near-edge structure (XANES) and extended x-ray absorption fine structure (EXAFS) experiments were performed on Cu-doped and…
Different sizes of PbS nanocrystals (NCs) were synthesized from sulfur–amine solution. Instead of using a hot-injection method, we prepared alkylamine-PbS NCs at room temperature in air, where the produced PbS NCs were dispersed in a non-polar solvent. In this work, alkylamine played dual roles as both reducing agent…
The title compound 2 was prepared and its crystal structure was determined at 100 K. The neat solid was examined by temperature dependent (57)Fe Mössbauer effect (ME) spectroscopy over the interval 92 < T < 318 K, and evidences two diamagnetic Fe(II) sites and one paramagnetic Fe(III) site. The latter shows spin-latti…
In the paper the influence of zirconium admixture on the structure and material constants of polycrystalline ferroelectric materials BaZrxTi1-xO3 (BZT) was examined. The barium zirconate titanate samples were prepared by a conventional solid state reaction method. A single phase with perovskite structure of the sample…
Structural and spin polarization effects of Cr, Fe and Ti elements on electronical properties of alumina have been studied by using of Local spin density approximation within density functional theory. The calculated results indicated that substituting aluminium atoms by these dopants have a significant influence on t…
Dextran graft copolymers, including dextran graft poly(N-methacryloylglycylglycine) copolymers conjugated with polyethylene glycol and tyrosine (Dex-g-PMAGGCONHPEG3k-NHTyr), dextran graft poly(N-(2-hydroxypropyl) methacrylamide-co-N-methacryloylglycylglycine)-tyrosine conjugates (Dex-g-P(HPMA-co-MAGGCONHTyr)), and dex…
Materials on phytoplankton from 11 Karelian lakes located in the basins of the White and Baltic seas were studied by scanning electron microscopy; 22 representatives of diatom algae of the class Centrophyceae, including those that are new for the flora of the lakes ( Aulacoseira lacustris , A. perglabra , A. tenella ,…
Recent work conducted using the Advanced Finite Element Analysis (AFEA) method to simulate the ‘natural’ crack growth of a circumferential PWSCC demonstrated that a subcritical surface crack can transition to a through-wall crack with significant differences between the inner diameter and outer diameter crack lengths.…
Yttria-stabilized zirconia ceramics were prepared by using different raw materials in order to compare commercially available optical ferrule. Injection-molded cylindrical green compacts were sintered in air at 1350°C, 1400°C and 1450°C for 2 hrs, followed by furnace cooling. Crystallinity, microstructure and mechanic…
The silane (TESPD) treated silica-filled silicone rubber (SR)/natural rubber (NR) blends are studied with regard to their mechanical, thermal, and optical properties. Two grades of SR, with and without vinyl group are used and the results are compared. The effects of a vinyl functional group in SR with respect to vibr…
Neutron powder diffraction has been used to investigate the redox behaviour of two n = 1 Ruddlesden–Popper (RP) oxides, La1.5+xSr0.5−xCo0.5Ni0.5O4+δ (x = 0.0, 0.2) in situ and in real time during cycling through the temperature range 20 < T/°C < 600 under flowing 5% H2. Both compositions retained I4/mmm symmetry throu…
Time Resolved Pump Probe (TRPP) technique has been implemented to study the thermal and mechanical properties of Ge 2 Sb 2 Te 5 (GST) film deposited on a silicon substrate. According to the knowledge of the thermal properties of the GST layer, the temperature dependant Thermal Boundary Resistance (TBR) at the metal-GS…
Novel C(3)-symmetrical heteroaromatic hexaazatrinaphthylene (HATNA) gelators symmetrically end-substituted with pendant aromatic and aliphatic amines were synthesized. Some of these π-conjugated structures induce self-assembly, forming fibers able to gelate solvents of different polarity at low wt% as demonstrated by…
Ag nanoparticles developed by inert gas aggregation were deposited on silicon and quartz substrates. The samples were annealed under high vacuum at 200C. The influence of annealing time-length on the average size and size dispersion was examined by field emission scanning electron microscopy and UV-visible absorption…
The viscoelastic properties of mica-reinforced polypropylene (PP) was studied in temperature range between −30°C and 120°C. WLF equation permits determining the free volume fraction in and transitions regions. It was shown that the value of this parameter is lower for transition, indicating that the free volume and th…
Self assembly systems formed by hydroquinone (HQ) and alkyloxy benzoic acids (OBA) are isolated. HQ formed double hydrogen bonds with p-n-alkyloxy benzoic acids (nOBA). Various hydrogen-bonded complexes have been synthesized with HQ and decyloxy to dodecyloxy benzoic acid respectively. Fourier transform infrared spect…
We investigated the thermal expansion properties of metal nitroprussides, MA[Fe(CN)5NO]·zH2O (MA = Mn, Fe, Co, Ni, Cu, Zn, and Cd), which have various network structures, i.e. three-dimensional (3D) cubic (Fmm for MA = Fe, Co, and Ni), distorted three-dimensional (distorted-3D) orthorhombic (Pnma for MA = Mn, Zn, and…
This paper aims to investigate the effect of Cr doping on the magnetic properties of Zn 1- x Cr x O (0 ≤ x ≤ 0.026) thin films deposited using a magnetron co-sputtering method under Ar+O 2 growth atmosphere. All of the films are highly c -axis-oriented wurtzite structures. The x-ray photoelectron spectroscopy results…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Pragya Tiwari, Himanshu Srivastava, Sanjay Rai, S. K. Deb; Recrystallization, Grain Growth in Cop…