Materials Literature
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The static domain structures and local switching behavior of relaxor ferroelectric 0.29Pb(In1/2Nb1/2)O3-0.44Pb(Mg1/3Nb2/3)O3-0.27PbTiO3 single crystals at three crystal orientations are studied using piezoresponse force microscopy (PFM). PFM domain imaging shows that both the [001] and [111] oriented crystals exhibit…
The polycrystalline sample of complex tungsten-bronze type compound (Na 2 Pb 2 La 2 W 2 Ti 4 Ta 4 O 30 ) was prepared by a high-temperature solid-state reaction technique. Room temperature preliminary structural study using X-ray diffraction (XRD) data exhibits the formation of a single-phase new compound. The SEM mic…
Abstract Diamond nanophotonics have evolved tremendously from the study of color centers in bulk single crystals and nanocrystals to their characterization in nanostructured environments. This development was facilitated by the ability to generate monolithic, sophisticated nanodevices in high quality single crystal di…
Since the implantation of the first artificial aortic heart valve by Hufnagel et al., the design and construction of heart valve prostheses has undergone continuous and drastic changes to improve t...
Abstract Summary: In this study cellulose nanowhiskers were obtained from balsa wood. For this purpose, fibers of balsa wood were exposed to hydrolysis reactions for lignin and hemicellulose digestion and acquisition of nano‐scale cellulose. Transmission electron microscopy (TEM) results demonstrated that the obtained…
Observation of an isotropic superconducting gap at the Brillouin zone centre of Tl0.63K0.37Fe1.78Se2, Wang, X.-P., Richard, P., Shi, X., Roekeghem, A., Huang, Y.-B., Razzoli, E., Qian, T., Rienks, E., Thirupathaiah, S., Wang, H.-D., Dong, C.-H., Fang, M.-H., Shi, M., Ding, H.
A light emitting diode has been developed on the basis of multilayer nanostructures in which CdSe/CdS semiconductor colloidal quantum dots serve as emitters. Their absorption, photo-, and electroluminescence spectra have been obtained. The strong influence of the size effect and the density of particles in the layer o…
ZnCdO nanocrystalline powder is synthesized by the simple solution method at room temperature. Synthesized powder was characterized by powder x-ray diffraction (XRD), scanning electron microscope with x-ray spectrometry (EDX), thermo gravimetry?differential thermal analysis (TG?DTA) and other spectroscopic techniques.…
Abstract Using metal‐organic (MO)CVD, gold films and arrays of gold nanoparticles are obtained from volatile organometallic dimethylgold(III) complexes with O, N, S donor ligands. As precursors, such compounds as (CH 3 ) 2 Au(OAc), (CH 3 ) 2 Au(piv), (CH 3 ) 2 Au(OQ), (CH 3 ) 2 Au(SQ), (CH 3 ) 2 Au(thd), and (CH 3 ) 2…
Abstract This article, the first in a two-part series, explains how powder metallurgy presents a cost-effective alternative to conventional titanium fabrication processes. It reviews the characteristics of different types of titanium powders and compares and contrasts near-net shape (NNS) production techniques, includ…
Metal semiconductor field-effect transistors (MESFETs) or metal oxide semiconductor FETs (MOSFETs) can be fabricated on hydrogen-terminated diamond without losing the surface hydrogen–carbon bonds and the surface adsorbates responsible for the surface carrier generation. Those FETs show their best performance in diamo…
Dendrimers represent a class of monodispersed synthetic macromolecules with a well defined three-dimensional structure of nanometer dimension in which a series of layered branches regularly extend from a central core molecule. Due to their precise nanoscale sizes, well-defined branched structures, and various surface…
This paper reports that ferromagnetism (FM) can be induced in ferroelectric barium titanate (BaTiO3) ceramic with selection of appropriate substituents like Zn and Mn. High density polycrystalline samples of Zn and Mn substituted BaTiO3 (Ba1−xZn x Ti1−xMn x O3, x=0, 0.02, 0.04, 0.06, 0.08 and 0.1) were prepared using…
ABSTRACT In the field of elastomer nanocomposites (ENCs), computational simulation technique is becoming more and more essential, as a result of its ability to provide important and clear information at the molecular level, which is always difficult to obtain or not accessible through experimental investigations. We f…
Microporous films of polyolefins, namely, polyethylene and polypropylene, have been prepared using the process based on the extrusion of the melt with the subsequent annealing, uniaxial extension, and thermal fixation. The influence of the conditions used for preparation of the films on their morphology, porosity, num…
Copper telluride onion flower like microstructures, constructed by quantum dots with various diameters, were obtained by a potentiostatic electrodeposition method at room temperature. The structural, optical, surface morphology, compositional analysis and Raman spectra properties of the deposited films have been studi…
The suitability for use in pyroelectric detectors of single-crystalline doped and undoped lead indium niobate-lead magnesium niobate-lead titanate was tested and compared with high-quality Mn-doped lead magnesium niobate-lead titanate and standard lithium tantalate. Pyroelectric and dielectric measurements confirmed a…
The electronic and transport properties of graphene grain boundaries (GBs) are studied using density functional theory and nonequilibrium Green's function method. Most GBs preserve the semi-metal properties of perfect graphene; however, some GBs can open a moderate band gap up to 0.5 eV, which provides a potential way…
Polyhydroxyalkanoates (PHA) and α-amylase (α-1,4 glucan-4-glucanohydrolase, E.C. 3.2.1.1) were co-produced by Bacillus sp. CFR-67 using unhydrolysed corn starch as a substrate. Bacterial growth and polymer production were enhanced with the supplementation of hydrolysates of wheat bran (WBH) or rice bran (RBH) individu…
The channels of single-walled carbon nanotubes (SWNTs) are filled with metallic silver. The synthesized nanocomposites are studied by Raman spectroscopy and optical absorption spectroscopy, and these data indicate a substantial modification of the electronic structure of the nanotubes upon their filling. Moreover, X-r…