Materials Literature
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Optical tweezers enable for non-destructive, contact-free manipulation of ultrasound contrast agent (UCA) microbubbles, which are used in medical imaging for enhancing the echogenicity of the blood pool and to quantify organ perfusion. Understanding the dynamics of ultrasound-driven contrast agent microbubbles from a…
BACKGROUND/PURPOSE: Adding lotions or emollients to the surface of a variety of paper products improves overall consumer comfort. Techniques to measure lotion transfer to skin are needed. METHODS: Two approaches were compared to assess lotion transfer from impregnated feminine pads: (1) pad application to the poplitea…
CO adsorption: Strong shifts in temperature-programmed desorption spectra may occur for alloys with respect to pure compounds as is demonstrated for CO adsorption on a CoPt surface (see figure). A correct interpretation of the data is only possible when corroborated with DFT calculations and a further experimental met…
Goldsuche: Mit einer Kombination von Trapped-Ion-Elektronenbeugung, Photoelektronenspektroskopie und Dichtefunktionaltheorie wurde nach der Struktur des freien Goldclusteranions Au34− gesucht. Die Ergebnisse sind in Einklang mit einem chiralen Cluster mit einer trigonalen Pyramide im Innern und C3-Punktgruppensymmetri…
A bi-layer structure comprising a thin gold layer and a polypyrrole (PPy) film is developed as a valve. To create such structures, the thin metal layer is used as a working electrode, and the polypyrrole film is electrochemically deposited on the metal electrode. A layer of Cr deposited under a stationary part of the…
Purpose To evaluate the performance of the blends of Mesua ferrea L. seed oil based polyurethane resins with a commercially available bisphenol‐A epoxy resin at different weight ratios. Design/methodology/approach For effective improvement of their various properties, polyurethane‐ester (PE) and polyurethane‐amide (PA…
The field electron emission from the single-walled carbon nanotubes with their open ends terminated by - BH, - NH, and - O has been simulated. We find that - BH and - NH suppress the apex−vacuum barrier significantly and lead to higher emission current in contrast to the - O-terminated structure. The calculated bindin…
One-dimensional boron nitride (BN) nanotube nanojunctions are of great interest for both fundamental and applied research because of their stable and excellent mechanical and physical properties. Large quantities of highly pure BN nanotube multiple Y- and/or T-junctions were synthesized by annealing pure boron nanowir…
Purpose To study and compare the inhibition effects of eco‐friendly inhibitors of sodium silicate and 1‐hydroxyethylidene 1,1 diphosphonic acid (HEDP) in corrosion control and prevention of soft water discolouration (red water) in carbon steel pipelines. Design/methodology/approach Electrochemical impedance and Tafel…
The mechanism of fluorine-functionalized multiwalled boron nitride nanotubes (MWBNNTs) is studied through ab initio calculations for the structural and electronic properties of (8,0)--(16,0) double-walled structures. It is shown that the F atoms could be exothermically doped into the interstitial region between two ad…
Docking methods are typically used within the biopharmaceutical industry for the challenging purposes of suggesting putative binding modes of new chemotypes and for virtual screening. When attempting to satisfy the far more simplistic yet fundamentally important goal of reproducing and identifying the correct binding…
This study investigated the chemical nature of impurity iron species and photoactive sites in the commercially available HZSM-5 zeolites with different Si/Al ratios. The samples were characterized by X-ray fluorescence spectroscopy, atomic absorption spectroscopy, X-ray absorption near-edge structure spectroscopy, ext…
Elastomeric polypropylene characterized by chains with an isotactic and atactic stereoblock structure shows elastic behavior in a large range of deformations notwithstanding the high degree of crystallinity, because of the occurrence of flip-flop reversible reorientation of crystals of the γ form that occur during str…
The double-gyroid phase of nanoporous silica films formed by evaporation-induced self-assembly (EISA) has been shown to possess facile mass-transport properties and may be used as a robust template for the nanofabrication of metal and semiconductor nanostructures. Recently, we developed a new synthesis of double-gyroi…
The thermal stability of polydiphenylamine synthesized through the oxidative polymerization of diphenylamine has been studied. It has been established that the main processes of thermal and thermooxidative degradation of polydiphenylamine begin at 600–650 and 450°C, respectively. It has been shown that, in the course…
The authors present results from molecular dynamics simulations on the effect of smooth and rough probes on the dynamics of a supercooled Lennard-Jones (LJ) mixture. The probe diameter was systematically varied from one to seven times the diameter of the large particles of the LJ mixture. Mean square displacements sho…
We discovered that poly(vinylphenol) (PVPh) possesses an extremely low surface energy (15.7 mJ/m2) after a simple thermal treatment procedure, even lower than that of poly(tetrafluoroethylene) (22.0 mJ/m2) calculated on the basis of the two-liquid geometric method. Infrared analyses indicate that the intermolecular hy…
1-n-Butyl-3-methylimidazolium (bmim) salts of [alpha-SiM12O40]4- and [alpha-S2M18O62]4- (M = Mo, W) were synthesized and characterized. In sharp contrast to the multiple one-electron diffusion-controlled reduction processes expected in solution at a glassy carbon electrode, reduction of these salts beyond the one-elec…
Due to the difficulties, such as lack of generalized synthetic methodologies, production of amorphous materials, diffraction pattern problems, and instability in air, etc., associated with II 3 −V 2 semiconducting compounds (II and V indicate elements of Group II and Group V.), single-crystalline II 3 −V 2 nanostructu…
The success of future nanotechnologies will strongly depend on our ability to control the structure of materials on the atomic scale. For carbon nanotubes it turns out that one of their structural parameters—the chirality—may not be controlled during synthesis. We explain the basic reason for this defect and show that…