Materials Literature
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Abstract The effects of physical aging of a 75 : 25 PC/ABS blend have been studied using differential scanning calorimetry (DSC) and Fourier transform infrared spectroscopy (FTIR). From DSC, two distinct peak endotherms at about 90°C and 110°C, which are associated with the glass transition of ABS ( T g ,ABS ) and PC…
We use our designed self-propagating high-temperature synthesis (SHS) method for the synthesis of the multipod crystals of cubic perovskite strontium titanate (SrTiO 3 ), which has a scale of about 5 μm in length and 200 nm in the cross section of legs. Electron microscopy and diffraction measurements show that the fo…
Many systems in nature exhibit transitions between fluid-like states and solid-like states, or 'jamming transitions'. There is a strong theoretical foundation for understanding equilibrium phase transitions that involve solidification, or jamming. Other jamming transitions, such as the glass transition, are less well…
Abstract Polyurethane coatings are highly flammable, and because of their widespread applications on different substrates (wood, steel, and building materials), there is a need to increase their fire‐safety properties. Intumescent additives sharply suppress the flammability properties of polyurethane coatings. Two pro…
Novel reproducible preparations of gold nanoparticles capped by aminoalcohols have been set up by reduction of HAuCl4 with NaBH4 in aqueous solution. The characterization of Au@aminoalcohol nanoparticles performed by 1H NMR, ATR-FTIR, UV-vis spectroscopies, and TEM microscopy highlighted the binding site and the natur…
Abstract Oxidative polymerization of pyrrole is initiated by photoexcited TiO 2 nanoparticles. Pyrrole oligomers and polypyrrole (PPy) are continuously produced with reaction time. The conversion of pyrrole monomer changes as a function of the concentration of TiO 2 nanoparticles. It is found that PPy in the composite…
The layer-by-layer (L-b-L) deposition of oppositely charged polyelectrolytic macroinitiators has been demonstrated on planar silica substrates. The build-up of the macroinitiator multilayers was monitored by ellipsometry (up to 21 layers) and dual polarization interferometry (up to 17 layers) and good agreement was fo…
This paper reports experimental results of in situ observations of thermochromic processes of two binary mixture systems of 1-(4-hydroxyphenyl)-3-octadecylurea ( PU18 ) + fluoran dye (FD), and 4-hydroxy- N -octadecylbenzamide ( PC18 ) + FD, which were obtained by using FT-IR spectroscopy, reflective optical density, a…
The structure and dynamics of poly(ethylene oxide) (PEO) intercalated in the galleries of a fluoromica inorganic clay were studied by spin-label electron spin resonance (ESR), XRD, FTIR, and DSC. The polymer was end-labeled by attachment of a nitroxide radical. Basic structural information was determined by XRD, while…
The early stages of silver nanoparticle formation in the presence of citrate and water have been investigated via first-principle theoretical calculations. Our study revealed that the charge density of the clusters is a key factor determining the selectivity among various growth pathways. An optimal charge density app…
Thin crystals of rutile, brookite, and anatase were irradiated in situ in the intermediate voltage electron microscope (IVEM-Tandem Facility) at Argonne National Laboratory using 1.0 MeV Kr ions at a temperature of 50 K. Determination of the critical amorphization fluence has revealed a large difference in the radiati…
The interaction of the proteins bovine serum albumin (BSA), lysozyme (Lys), lactoferrin (Lf), and fibronectin (Fn) with surfaces of protein-resistant poly(ethylene oxide) (PEO) and protein-adsorbing poly(acrylic acid) (PAA) fabricated by plasma-enhanced chemical vapor deposition has been studied with quartz crystal mi…
Drähte fest im Griff: Bleichalkogenid-Heterostrukturen, einschließlich legierten und Kern-Schale-Nanodrähten (siehe HRTEM-Bild eines PbSe-PbTe-Kern-Schale-Nanodrahts), wurden in Lösung hergestellt, wobei die Strukturbildung über die Syntheseparameter steuerbar ist. Die neuen Heterostrukturen könnten Materialien zugäng…
Magnetic properties of nanocrystalline ${\text{LaCoO}}_{3}$ with particle size of 25, 30, 32, and 38 nm, prepared by the citrate method, were investigated in temperature range 2--320 K, magnetic field up to 50 kOe, and under hydrostatic pressure up to 11 kbar. All nanoparticles exhibit weak ferromagnetism below ${T}_{…
With the global renewal of interest in PVC, this book is well timed, considering that PVC stabilization is the most important aspect of its formulation and performance. Only four books have been published on PVC degradation and stabilization (the last one in the 1980s), and two of them are by the author of this book.…
The structural and morphological changes occurring in an ensemble of vapor deposited palladium nanoclusters have been studied after several hydrogenation cycles with x-ray diffraction, extended x-ray-absorption fine structure spectroscopy, Rutherford backscattering spectrometry, and STM. Initial hydrogenation increase…
Thermoelectric elements (thermogenerators) with organic semiconductors or semimetals, respectively, are presented. To show the feasibility of such elements, in particular organic charge transfer salts and graphite powder as 'active' materials were investigated. These active materials were embedded in a PVC blend and s…
Our high pressure x-ray diffraction and Raman scattering studies on lanthanum hafnate $({\text{La}}_{2}{\text{Hf}}_{2}{\text{O}}_{7})$ establish that it decomposes into its constituent oxides beyond $\ensuremath{\sim}18\text{ }\text{GPa}$. These results are supported by our first-principles total energy calculations.…
Getting the grip on wires: Lead chalcogenide heterostructures, including alloy and core–shell nanowires were achieved by solution phase synthesis (see HRTEM image of a PbSe–PbTe core–shell nanowire). Structural control was gained by changing the growth parameters. The new heterostructures have a potential to provide b…
We show that effective superconducting orders generally emerge at low energy in the superconducting state of graphene with conventionally defined pairing symmetry. We study a particular interesting example, the ${d}_{{x}^{2}\ensuremath{-}{y}^{2}}+i{d}_{xy}^{\ensuremath{'}}$ spin singlet pairing state in graphene which…