Materials Literature
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The ability to probe charge carriers transport behavior under pressure has the potential to unlock many key questions in photoconduction, resistive switch, solid ion transport, etc. We utilize the Hall-effect measurements and the first-principles calculations on Ag2S to reveal the pressure induced changes in its elect…
β-Ga2O3 nanostructures were synthesized via vapor transport method on gold coated Silicon substrate in N2 ambient. The as synthesized products were investigated by grazing incident X-ray diffraction, scanning electron microscopy and photoluminescence (PL) spectroscopy. It is shown that the intensity of photoluminescen…
Nanoscale oxides play an important role in oxide dispersion strengthened (ODS) alloys for improved high temperature creep resistance and enhanced radiation damage tolerance. In this study, transmission electron microscopy (TEM) and atom probe tomography (APT) were combined to investigate two novel Fe‐16Cr‐3Mo (wt.%) b…
The modulation of the optical transmittance in multilayer graphene by means of an electrical signal in the simple configuration of coplanar electrodes is reported. Besides the fundamental frequency of modulation, higher harmonics also appear in the transmitted signal. Modulation in the optical reflectance is also obse…
Cap in hand: Ricinoleic acid (RA) replaces oleic acid as capping ligand in the synthesis of upconverting nanocrystals in the size range of 10 nm. The presence of hydroxyl groups near the double bond in RA is advantageous in hydroxylation of the bond, and the size of the nanocrystals is preserved. The small size, high…
In this paper, a new type of multilayer feedforward neural network has been proposed based on inspiration from the Preisach model, which has been called the Preisach neural network (Preisach-NN). It is comprised of input, output, and two hidden layers. The input and output layers contain linear neurons, whereas the fi…
Lately, it was found that the Au nanoclusters stabilised by poly(N-vinyl-2-pyrrolidone) [PVP; (C6H9ON)n], abbreviated to Au:PVP, can oxidise p-hydroxybenzyl alcohol selectively into the corresponding aldehyde in water without degradation. This observation indicates that Au cluster can exhibit high catalytic activity w…
This research explores electrochemical correlations between heat‐affected zones (HAZs), produced by Gleeble © thermal simulation cycles, and their passivation behavior in bicarbonate–carbonate solutions. The investigations were carried out in comparison with the base API‐X100 steel in naturally aerated 0.5 g/L chlorid…
The role of the initial defects of graphene characterized by Raman spectroscopy is correlated with the physical mechanisms causing the hysteretic device characteristics of graphene field effect transistors (FETs). Fast charging related to the tunneling-induced charge exchange is found to be closely correlated with the…
We discuss Lehmann effects and rotato-electricity for liquid crystalline phases made of achiral molecules. We point out that for static and dynamic Lehmann effects to exist, it is not necessary to have chiral molecules provided the overall structure has macroscopic chirality. This question is of direct relevance for l…
A diatom frustule is functionalized with an alkyl halide to allow the growth of a polymer from its surface via deactivation enhanced atom transfer radical polymerization. The diatom core is partially dissolved to form a more translational platform. This method can be used to create an array of nano-structured composit…
m -Aramid/chitosan hybrid films and nanosized webs were produced. The m -aramid and chitosan salt were dissolved in dimethyl sulfoxide followed by coagulation in a sodium hydroxide solution to produce the m -aramid/chitosan film. An electro-spinning process was used to prepare the nanosized web to increase the surface…
A facile method for direct and selective area conversion of 4H-SiC substrates into homogeneous epitaxial graphene is demonstrated by the irradiation of a low energy (5 keV) electron beam (e-beam). The localized interactions like scattering, excitation, and ionization between the primary electrons and the SiC surface r…
In this paper, the fabrication and growth mechanism of net-shaped micropatterned self-organized thin-film TiO2 nanotube (TFTN) arrays on a silicon substrate are reported. Electrochemical anodization is used to grow the nanotubes from thin-film titanium sputtered on a silicon substrate with an average diameter of ~30 n…
When the giant icosahedral {Mo72Fe30} cluster containing compound [Mo72Fe30O252(CH3COO)12{Mo2O7(H2O)}2{H2Mo2O8(H2O)}(H2O)91]·150H2O (1) is refluxed in water for 36 h, it results in the formation of nanoiron molybdate, Fe2(MoO4)3, in the form of a yellow precipitate; this simple approach not only generates nanoferric m…
A series of 2,5-di(2-thienyl)-N-methylpyrrole derivatives 1a-1d with methylthio end-capping groups and electron-donating substituents at the 3-position of the thiophene rings was synthesized, and the effects of the substituents on the structure, stability, and π-dimerization ability of the radical cation were investig…
Reduction of Ti 4+ to Ti 3+ was found in boron‐doped BaTiO 3 ceramics when we sintered the samples at very low temperature (>850°C) in 5%H 2 /Ar. Such reduction did not occur in pristine BaTiO 3 ceramic. The methods such as UV –vis spectroscopy, luminescence spectroscopy, and X ‐ray photoelectron spectroscopy confi…
We report the striking switching of the antiferromagnetic ground state of copper-based double perovskites (Ca/La2/3)Cu3Ti4O12 to the ferrimagnetic state by introduction of small amounts of Mn on Ti-sites. CaCu3Ti3MnO12, La2/3Cu3Ti3.5Mn0.5O12, LaCu3Ti3MnO12, and LaCu3Ti2Mn2O12 were synthesized at normal pressure. These…
In this study, facile and ecofriendly methods have been developed for the biosynthesis of silver nanoparticles from silver nitrate using the seed extract of Strychnos potatorum, a natural phytocoagulant. The effect of room temperature stirring, water bath heating and autoclaving on nanoparticle synthesis was studied.…
In this article, we report a simple approach to generate micropillars (whose top portions are covered by sub-micron wrinkles) on the inner surfaces of polystyrene (PS) microchannels, as well as on the top surface of the PS substrate, based on strain-recovery deformations of the PS and oxygen reactive ion etch (ORIE).…