Materials Literature
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Ferroelectric polymorphic phase coexistence, associated with either the presence of a morphotropic phase boundary or a temperature-driven polymorphic phase transition, is currently acknowledged as the key to high piezoelectric activity and is searched when new perovskite materials are developed, like lead-free alterna…
Abstract The spectroscopic properties of Tellurium Calcium Zinc Niobium oxide Borate (TCZNB) glasses of composition (in mol%) 10TeO 2 + 15CaO + 5ZnO + 10 Nb 2 O 5 + (60 – x )B 2 O 3 + Nd 2 O 3 ( x = 0.1, 0.5, 1.0 or 1.5 mol%) have been investigated experimentally. The three phenomenological intensity parameters Ω 2 ,…
Purpose The purpose of this paper is to adopt both the fragments of imidazole and thiosemicarbazide as reaction centers, to synthesize a water-soluble corrosion inhibitor named as thiosemicarbazide-imidazole derivative (TH-IM). Design/methodology/approach This paper presents potentiodynamic polarization tests, electro…
BODIPY is a highly versatile fluorophore for biological imaging with a tunable fluorescence emission (500–800 nm) that overlaps the optically transparent window for tissue (600–1300 nm). Herein, we describe the synthesis of optically distinct BODIPY‐based profluorescent probes bearing meso ‐ and β‐substituted isoindol…
In a split Hopkinson pressure bar bending test on quasi-brittle materials, the specimen maintains a non-equilibrium state and failure occurs before the response of the supports (the transmission bars) appears, as would occur in a support-free impact test. This paper investigates principally the dynamic response of un-…
The fabrication of super-antireflective structure films is reported, which exhibit an unprecedented refractive index profile and eliminate reflections almost completely for any angle of incidence with extreme precision using a newly developed square voltage pulse anodization. The application of the films on polymer so…
The temperature-dependent hard X-ray excited optical luminescence (XEOL) spectroscopy was used to study the optical properties of O and Zn polarity of a c-plane single crystal ZnO wafer. By analyzing the XEOL and XRD, we found an unprecedented blue shift of the free exciton transition with increasing the excited carri…
ABSTRACT Nanocomposites of natural rubber (NR)/polypropylene (PP) (80/20 wt %) blends filled with 5 phr pristine clay were prepared by melt‐mixing process. Effects of clay incorporation technique via conventional melt‐mixing (CV) and masterbatch mixing (MB) methods on nanostructure and properties of the blend nanocomp…
Subliming organic compounds into a stream of nitrogen gas and passing the vapors rapidly through a very hot oven (flash vacuum pyrolysis) promotes high-temperature thermal reactions in the gas phase that are generally difficult to achieve in solution under ordinary laboratory conditions. Exploring, exposing, and explo…
We have investigated the ability of two modular phyllosilicates (palygorskite and sepiolite) to store CO 2 molecules inside their structural channels by means of classical molecular dynamics. Several models containing an increasing supercritical-CO 2 /H 2 O ratio into the phyllosilicate channels have been built and th…
Since optical gain was observed from colloidal quantum dots (CQDs), research on CQD lasing has been focused on the CQDs themselves as gain materials and their coupling with optical resonators. Combining the advantages of a CQD gain medium and optical microcavity in a laser device is desirable. Here, we show concentric…
A simple model of a hydrophobic polymer in water is studied. The model polymer, a chain of Lennard-Jones particles with a fixed bond length, is designed in such a way that it undergoes a coil-to-globule conformational change near room temperature upon heating in liquid water. At low temperatures (≲270 K), the polymer…
Abstract We present a theoretical study of the electrical contact between the two most common crystallographic phases of MoS 2 monolayer crystals: the stable semiconducting 2H phase and the metastable metallic 1T phase. A density functional theory (DFT) study of the electronic structure of interface between the two ph…
Two dumbbell-shaped organogelators with a p-quaterphenylene core were synthesized, and their self-assembly properties were investigated. These low-molecular-weight gelators could form self-supporting gels in many apolar organic solvents with an H-type aggregation form through a synergic effect of π-π stacking, intermo…
Pimeloyl-acyl carrier protein (ACP) methyl esterase is an α/β-hydrolase that catalyzes the last biosynthetic step of pimeloyl-ACP, a key intermediate in biotin biosynthesis. Intriguingly, multiple nonhomologous isofunctional forms of this enzyme that lack significant sequence identity are present in diverse bacteria.…
We demonstrate and characterize an optical control of the plasmonic heat delivered by a monolayer substrate of gold nanoparticles, obtained by modulating the effective refractive index of the neighboring dielectric medium. The effect, which exploits the dependence of the nematic liquid crystal (NLC) refractive index o…
External-stimuli-caused reversible morphotropic phase transformations between the thermodynamically stable competing structural phases are dynamically probed at the nanoscale in the strain-engineered mixed phase morphotropic BiFeO3 thin films. Using an acoustic approach, phase transformations and the associated elasti…
We demonstrate a method to reduce the thermal conductivity of fully dense (above the rigidity percolation threshold) amorphous thin films below the minimum limit by systematically changing the coordination number through hydrogenation. Studying a-SiO:H, a-SiC:H, and a-Si:H thin films, we measure the thermal properties…
Highly dispersed low-coordinate Pd sites on SiO 2 are fabricated by grafting the Pd II PCP-pincer complex ( tBu PCP)Pd–OH ( tBu PCP = 2,6-C 6 H 3 (CH 2 P t Bu 2 ) 2 ) on SiO 2, followed by calcination with ozone (100 °C) and reduction with H 2 (300 °C). The chemisorption process and structure of this organometallic co…
In this work, chemically cross-linked poly(ethylene vinyl acetate) (EVA) was melt-compounded with poly(ε-caprolactone) (PCL) to prepare the EVA/PCL blends. The chemical cross-linking reaction of EVA was induced by dicumyl peroxide (DCP) during the melt compounding processing. The effects of the cross-linking degree of…