Materials Literature
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Complementary fluorescence microscopy and ultrafast transient absorption spectroscopy measurements spanning a range of time scales from seconds to femtoseconds probe the interfacial dynamics of charge carriers in CdSe nanorod/polymer blends. Together, these very different techniques provide new information about the o…
We developed a one-step method for production of anisotropically etched graphene using supercritical fluid (SCF). Anisotropic etching of a graphite substrate and dispersed graphite powder with Ag nanoparticles was conducted in supercritical water (SCW). Because of the exfoliation effect of SCF, graphene was isolated f…
Dielectric properties of (PSN) ceramic system, prepared from mechanochemically activated powder, were studied in a broad temperature range of 150–750 K. Various distinctive contributions were recognized in the detected reponse. A typical relaxor dispersive maximum, accompanied by a sharp dielectric anomaly showing a h…
Sr2SiS4:Ce3+ is an efficient blue-emitting (460 nm) phosphor, excitable with light of wavelengths up to 420 nm. From the excitation spectrum, we construct the energy level scheme and use it to check the predictive power of the Dorenbos model, relating the positions of the Ce3+ energy levels with those of Eu2+ in the s…
Abstract BACKGROUND The focus of wastewater management has evolved from treatment technology into resource recovery, which enables simultaneous waste minimization and value‐added product generation. This study utilized palm oil mill effluent ( POME ) for volatile fatty acids ( VFA ) production by acidogenic fermentati…
BACKGROUND: Nephrogenic systemic fibrosis (NSF) represents a rare fibrosing disorder occurring after administration of gadolinium-containing contrast agents during renal insufficiency. In order to prove the effect of gadolinium elimination on clinical signs, we identified and quantified gadolinium in skin biopsies of…
BACKGROUND: Bacillus anthracis is a pathogen that causes life-threatening disease--anthrax. B. anthracis spores are highly resistant to extreme temperatures and harsh chemicals. Inactivation of B. anthracis spores is important to ensure the environmental safety and public health. The 2001 bioterrorism attack involving…
A method for the synthesis of single-phase powdered InOF under ambient pressure has been developed. The method involves pyrolysis of a hydrate of InF3 in an O2 atmosphere of controlled humidity. Various intermediate phases were formed during the pyrolysis, and their structures and interconversions were analyzed. Combi…
Finding new methods for the fabrication of metal oxide nanocrystals with high control on their composition, size and crystallinity is paramount for making large-area and low-cost optical coatings. Here, we demonstrate the fabrication of thermochromic VO 2 nanocrystals using a physical vapour deposition-based route, wi…
PLA fibers with high tannin content are prepared by melt spinning PLA with tannin acetate (TanAc) prepared from a condensed tannin. PLA with up to 50% TanAc content can be readily processed, giving melt spun fibers suitable for further processing as textile fibers or for carbonization. The PLA molecular weight profile…
Despite an intense research effort, the physical mechanism underlying the formation of a quasi-two-dimensional electron gas at the interface between the band insulators LaAlO3 and SrTiO3 is still not fully understood. Interface-sensitive optical second-harmonic spectroscopy can shed light on this mechanism, by accessi…
The dissolution and recrystallization of Polyamide 46 (PA46) from “superheated” (i) water and (ii) concentrated ionic solutions of strong solubilizing mono- and divalent Hofmeister ions are studied, utilizing in situ high-resolution magic-angle spinning (HR-MAS) nuclear magnetic resonance (NMR) supported by wide-angle…
We study the dynamics of polymer chain collapse into a globular state in poor solvent, as a function of chain flexibility. We examine the compactness of the folded globule assessing the direct contact and a larger length-scale structural characteristics at various persistence lengths l p . We discover that semiflexibl…
PEG-SH-capped gold nanorods (Au NRs) well dispersed in various organic solvents have been prepared to study the solvent effects on the two-photon photoluminescence (TPPL) properties and ultrafast excitation dynamics of Au NRs. The TPPL intensities of Au NRs in different organic solvents including DMF, DEG, CH3OH, C2H5…
Monte Carlo simulations shed light on the stress state of Si nanocrystals embedded in amorphous silica, unraveling and explaining its nature and origins. This is achieved by generating detailed stress maps and by calculating the stress profile as a function of size and distance between the nanocrystals. For normal oxi…
This work explores the strain dependence of the piezoelectric effect in GaAs and InAs zinc blende crystals. We write the polarization in terms of the internal anion-cation displacement and the ionic and dipole charges. We then use ab initio density functional theory to evaluate the dependence of all quantities on the…
Due to a distinct nature of thermomechanical smart materials' reaction to applied loads, a revolutionary approach is needed to measure the hardness and to understand its size effect for pseudoelastic NiTi shape memory alloys (SMAs) during the solid-state phase transition. Spherical hardness is increased with depths du…
Quasi-static, low-velocity impact (LVI) and ballistic impact loading conditions were used to find the material properties and dynamic responses of E-glass/phenolic composites. Standard American Society for Testing and Materials (ASTM) tests were used to find the density, Poisson’s ratio, tensile, compressive and shear…
We investigate energy relaxation of hot carriers in monolayer and bilayer graphene devices, demonstrating that the relaxation rate increases significantly as the Dirac point is approached from either the conduction or valence band. This counterintuitive behavior appears consistent with ideas of charge puddling under d…
A soybean based coating with thermally responsive Diels–Alder linkages has been prepared following an automotive 2-component formulation.