Materials Literature
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The Smart CutTM technology has been used for LiTaO3 layer transfer. A 3-inch full wafer single-crystal LiTaO3 layer onto a carrier wafer comprising a metallic electrode is reported.
The demand for better understanding of the mechanism of soot formation is driven by the negative environmental and health impact brought about by the burning of fossil fuels. While soot particles accumulate most of their mass from surface reactions, the mechanism for surface growth has so far been characterized primar…
The interaction between polycyclic aromatic hydrocarbons (PAHs) and single walled carbon nanotubes (SWNTs) has been studied by fluorescence spectroscopy. Fluorescence quenching as a function of concentration is modeled, revealing regions where the interaction causes a debundling of the carbon nanotubes. The binding en…
A detailed kinetics study of the first-order structural transition in virgin NiTi, Ni47Fe3Ti50, and Ni2+xMn1-xGa (x= 0 and 0.26) manifests the varying role of renucleation-driven austenitic growth with the doping-induced disorder and the magnetization state. The austenite transitions were investigated using differenti…
The equilibrium growth-starting supercooling Δ T Geq for the (100) and (111) faces of a sodium chloride crystal was measured at different pHs in the presence of citric acid. The equilibrium growth-starting supercooling Δ T Geq is defined for a given crystallographic face as the degree of supercooling at which the crys…
The magnetically weakly anisotropic cubic Ni-Mn-Ga Heusler alloys exhibit martensitic transformation resulting in martensitic phases with elastically soft crystal lattices and strong magnetocrystalline anisotropies. The magnetic state of these martensites is coupled with a highly mobile twin structure through the ordi…
Hard anodic layers produced under DC conditions in sulphuric acid on a commercial AA 6060 aluminium alloy have been characterised by electron microscopy and secondary ion mass spectroscopy (SIMS). Once exposed during anodising, α–Al(Fe, Mn)Si intermetallic particles start to corrode in the electrolyte. Partially corro…
BACKGROUND: The pyridoxal-5'-phosphate (PLP)-dependent or vitamin B6-dependent enzymes that catalyze manifold reactions in the metabolism of amino acids belong to no fewer than four evolutionarily independent protein families. The multiple evolutionary origin and the essential mechanistic role of PLP in these enzymes…
Dynamic acrylamide/acrylate polymeric brushes were synthesized at gold-plated quartz crystal surfaces. The crystals were initially coated with polystyrene-type thin films, derivatized with photolabile iniferter groups, and subsequently subjected to photoinitiated polymerization in acrylamide/acrylate monomer feeds. Th…
By combining a liquid primer and a plasma jet system, a new route to improved adhesion on various substrates has been developed. The liquid primer is introduced as an aerosol into a plasma jet and the resultant active species are deposited as a polymer coating on adjacent surfaces. Careful control of the plasma parame…
Abstract The mixed addenda isopolyanion, [N(CH 3 ) 4 ] 2 Na 2 [ cis ‐Nb 2 W 4 O 19 ] · 18H 2 O, reacts with Cu(NO 3 ) 2 in water and in the presence of NH 2 CH 2 CH 2 NH 2 (en) or NH 4 OH at 60 °C to yield a phase that is decorated {[Cu(en) 2 (H 2 O)] 2 [Nb 2 W 4 O 19 ] · 2H 2 O ( 1 )} or charge‐balanced {[Cu(NH 3 ) 4…
Two different approaches to explain and predict the types of magnetic ordering in the 3d metal series and their compounds are reviewed. According to the crossing theorem of Heine and Samson, the effective exchange coupling changes sign from negative (antiferromagnetic ordering) in the middle of 3d band to positive (fe…
We predict that two electron beams can develop an instability when passing through a slab of left-handed media (LHM). This instability, which is inherent only for LHM, originates from the backward Cherenkov radiation and results in a self-modulation of the beams and radiation of electromagnetic waves. These waves leav…
We report the temperature, field, and time dependence of magnetization on sol-gel prepared nanoparticles of $\text{Ni}{(\text{OH})}_{2}$. At higher temperature the system is found to behave as a paramagnet. As we lower the temperature the system undergoes paramagnet to ferromagnet transition. We also find evidence for…
Polymorph selection of biominerals is an interesting phenomenon as observed in some natural shells, which contain distinct polymorphs of calcium carbonate in one organism. The reason why distinct polymorphs present in different portions of organisms has attracted increasing attention. In this work, we selectively synt…
We report the microstructural and magnetic properties of monodispersed nanoparticles (NPs) of antiferromagnetic MnO ( T N = 118 K), with epitaxial ferrimagnetic Mn 3 O 4 ( T C = 43 K) shells. Above T C , an unusually large magnetization is present, produced by the uncompensated spins (UCSs) on the surface of the MnO p…
Abstract BACKGROUND: Enzymes have received increasing attention as biocatalysts. The poly(lactic) acid (PLA) has been widely employed in biomedical applications and PLA synthesis by a ‘green route’ is of particular interest. Here the aim is to prepare PLA using lipases, focusing on optimization of the procedure. The e…
Polymer nanospheres were synthesized through polymerization of resorcinol/formaldehyde (RF) in the presence of a basic amino acid, l -lysine, as a catalyst. The diameters of the RF polymer nanospheres can be tuned in the range of 30−650 nm by adjusting the molar ratios of l -lysine/H 2 O and resorcinol/H 2 O in the pr…
A versatile method is proposed to generate configurations of coarse-grained models for polymer melts. This method, largely inspired by chemical "radical polymerization," is divided in three stages: (i) nucleation of radicals (reacting molecules caching monomers), (ii) growth of chains within a solvent of monomers and…
Solubilization of fluticasone propionate (FP) was effected using aqueous solutions of (i) different grades of poly(ethylene glycol) (PEG), (ii) methanol, and (iii) acetone to enable antisolvent crystallization by the addition of water. The solubility of FP in acetone was significantly higher than in PEG 400 or PEG 600…