Materials Literature
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We have developed pillared layered rare earth hydroxides showing the reversible photoluminescence switching via reducing–oxidizing processes. An air-stable Ce 3+ -based host, Ce 2 (OH) 4 SO 4 ·2H 2 O, was successfully synthesized via a homogeneous alkalization protocol to precipitate Ce 3+ ions from a solution of the…
Although precisely controlled microdomains of block copolymers (BCP) provide an excellent guiding matrix for multiple nanoparticles (NPs) to be controllably segregated into a desired polymer block, localization and positioning of individual NPs have not been demonstrated. Here, we report a unique one-to-one positionin…
We consider an electronic spin, such as a nitrogen-vacancy center in diamond, weakly coupled to a large number of nuclear spins, and subjected to the Rabi driving with a periodically alternating phase. We show that by switching the driving phase synchronously with the precession of a given nuclear spin, the interactio…
For the first time a magnetic quantum‐size effect is found in paramagnetic titanium monoxide nanocrystals with the sizes down to 30 nm. In situ measurements in the temperature range from 300 to 1200 K showed that the magnetic susceptibility of superstoichiometric titanium monoxide nanocrystals TiOy (y > 1) depends not…
The uniaxial tensile and compressive behavior of the peak‐aged sand‐cast Mg–10Gd–3Y–0.5Zr alloy from 25 to 250 °C is investigated. The results show that the alloy exhibits excellent high‐temperature tensile and compressive properties compared with other magnesium alloys. The tensile yield stress and ultimate tensile s…
This article reports a new class of mechano-optical materials CaZnOS : Cu with a non-centrosymmetric layered structure. The mechano-optical conversion is strongly dependent on the Cu concentration in CaZnOS. The mechano-optical conversion of CaZnOS : Cu changes from initial mechanoluminescence to mechanical quenching…
Urea water solution (UWS) droplet evaporation characteristics directly affect the conversion and distribution of NH3 in urea based selective catalytic reduction (SCR) system. The UWS droplet temperature is very difficult to be measured directly. Whereas, this piece of research work involves the measurement of droplet…
Flexible visible-blind UV imaging arrays tolerant to curvature are demonstrated. The functionality is enabled by crystalline oxygen-deficient zinc oxide pixels, which show high sensitivity and fast response to UV light. Such large-area, bendable imaging arrays will enable new advancements in portable and wearable elec…
Oxide materials have recently attracted much research attention for applications in flexible and stretchable electronics due to their excellent electrical properties and their compatibility with established silicon semiconductor processes. Their widespread uptake has been hindered, however, by the intrinsic brittlenes…
Density functional theory calculations have been performed to study the experimentally synthesized Au30S(SR)18 and two related Au30(SR)18 and Au30S2(SR)18 clusters. The patterns of thiolate ligands on the gold cores for the three thiolate-protected Au30 nanoclusters are on the basis of the "divide and protect" concept…
The effect of intrinsic ripples on the mechanical response of the graphene monolayer is investigated under uniaxial loading using molecular dynamics (MD) simulations with a focus on nonlinear behavior at a small strain. The calculated stress-strain response shows a nonlinear relation through the entire range without c…
From magnetic susceptibility, dielectric permittivity, electric polarization and specific heat measurements, we discover spin-induced ferroelectricity and magnetoelectric coupling in Mn3TeO6 and observe two successive magnetic transitions at low temperatures. A non-ferroelectric intermediate magnetic state occurs belo…
The effect of initial void geometry on damage progression in a thin aluminum film under uniaxial load is studied via molecular dynamics (MD) method. The embedded voids are with different initial geometries regarding shape, porosity and intervoid ligament distance (ILD). Major simulations are run upon twelve MD geometr…
We investigated local phase transition behaviors in epitaxial VO2/TiO2 thin films using variable-temperature Kelvin probe force microscopy while spanning the metal–insulator transition (MIT). Fully strained thin films were almost free of grain boundaries. In contrast, thicker films had cracks (dislocations) caused by…
The observation of a previously unreported optoelectronic effect, namely, a light‐induced diode‐like response in multilayered MoSe2 field‐effect transistors is reported. It has a sense of current rectification that is controllable through a gate voltage. It is argued, using numerical simulations, that this behavior re…
Raman spectroscopy/mapping is used to investigate the variation of Si phonon wavenumbers, i.e., lower wavenumber (LW ~ 495–510 cm−1) and higher wavenumber (HW ~ 515–519 cm−1) phonons, observed in Si–SiO2 multilayer nanocomposite (NCp) grown using pulsed laser deposition. Sensitivity of Raman spectroscopy as a local pr…
Aqueous silver nanocolloid was synthesized in a single step by a biogenic approach using aqueous leaf extract of Lippia javanica plant which acts as both reducing as well as capping agent. The as-synthesized silver nanoparticles were characterized by UV–visible absorption spectroscopy, high-resolution transmission ele…
ABSTRACT In the present work, poly (lactic acid)/thermoplastic starch/gelatin sheets were produced by calendering–extrusion process and silver nanoparticles (AgNPs, synthesized by chemical reduction with d‐glucose), were incorporated at sheet surfaces to promote antimicrobial activity. A gelatin solution containing Ag…
ABSTRACT In this study, polyurethane prepolymer (PUP) was prepared by the reaction of Poly‐1,4‐butylene glycol adipate diol (PBA) and 4,4′‐Methylenedi‐p‐phenyl diisocyanate (MDI). The as‐prepared PUP was then blended with Polylactide (PLA), and the impact of the PUP on the blends regarding their structure and properti…
In situ high-pressure Raman spectroscopy and ab initio calculations are carried out to investigate the phase stability and the thermal expansion behavior of ${\mathrm{H}}_{3}[\mathrm{Co}(\mathrm{CN}{)}_{6}]$. Raman studies at high pressures in a diamond anvil cell identify soft phonons and phase instability at 2.3 GPa…