Materials Literature
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Dissolution of chitosan in ionic liquids was accomplished. It has been shown that 1-butyl-3-methylimidazolium acetate (BMIMAc) is a better solvent than 1-butyl-3-methylimidazolium chloride (BMIMCl). Dissolution of chitosan in BMIMCl required a prior regeneration of chitosan from 1% acetic acid solution. In the case of…
The traditional anodes of choice in the electrowinning industry have been lead based \nanodes. However, these anodes display high energy consumption and low corrosion \nresistance during operation. These problems led to the investigation of other anode \nmaterials such as dimensionally stable anodes (DSAs), consisting…
List of Tables List of Tables Tab.2.1: Conditions and results of esterification of cellulose dissolved in DMAc/LiCl mediated with Tos-Cl with different carboxylic acids Tab. 2.2: Conditions and results of esterification of cellulose dissolved in DMAc/LiCl with αlipoic acid in situ activated with Tos-Cl 23 and CDI 24-2…
The existing polar continuum theory contains unresolved indeterminacies in the spherical part of the couple-stress tensor. This severely restricts its applicability in the study of micro and nano-scale solid and fluid mechanics and, perhaps more importantly, in the investigation of fluid turbulence phenomena, which in…
KCrF3 represents another prototypical orbital-ordered perovskite, where Cr2+ possesses the same electronic configuration of 3d4 as that of strongly Jahn-Teller distorted Mn3+ in many CMR manganites. The crystal and magnetic structures of KCrF3 compound are investigated by using polarized and unpolarized neutron powder…
Abstract Born—Oppenheimer molecular dynamics simulation
Diamond-containing material (DCM) synthesized by detonation was separated into fractions. Raman and infrared spectra and X-ray diffraction patterns of the individual fractions were measured. The particles of this material were characterized by the variable ratio of the diamond (sp3) and non-diamond components. The dis…
Nanostructured thin films were deposited by excimer laser ablation of a hot pressed SnO2 target at the fixed laser fluence of 1.0 J cm−2 in a controlled oxygen atmosphere. Information about the film's structural properties has been obtained by means of micro-Raman and X-ray photoelectron spectroscopies. A different fi…
The laser ion source is one of the most powerful heavy ion sources. However, it is difficult to obtain good stability and to control its intense current. To overcome these difficulties, we proposed a new beam injection scheme called “direct plasma injection scheme”. Following this it was established to provide various…
PURPOSE: The aim of the study was to quantify the effect of miniphantoms on in-air output ratio measurements, i.e., to determine correction factors for in-air output ratio. METHODS: Monte Carlo (MC) simulations were performed to simulate in-air output ratio measurements by using miniphantoms made of various materials…
The characteristic feature of the structure of the title compound, dipotassium bis(sulfito-κS)mercurate(II) 2.25-hydrate, is a layered arrangement parallel to (001) where each of the two independent [Hg(SO(3))(2)](2-) anions are grouped into centrosymmetric pairs and are surrounded by two K(+) cations to give the over…
It is presented the FT-Raman spectroscopic investigation of the lead tartrate dihydrate and lead iodide dihydrate.The difference in the spectroscopic behavior of these salts were found which can be attributed to a different geometry of the tartrate and iodide ions. The structural differences between the coordination e…
The (β/α)₈-barrel is one of the most abundant folds found in enzymes. To identify the independent folding units and the segment(s) that correspond to a minimum core structure within a (β/α)₈-barrel protein, fragmentation experiments were performed with Escherichia coli phosphoribosylanthranilate isomerase, which has a…
The internal friction was measured for an Al–Cu–Fe icosahedral phase (i-phase) and an Al–Cu–Fe–Si 1/1 approximant phase (1/1-phase) by using a dynamical mechanical analyzer (DMA) in the frequency range 0.05–10 Hz and the temperature range 300–873 K. For the i-phase, four absorption peaks were observed at around 420, 5…
Bis(μ(2)-3-isopropyl-7-oxocyclohepta-1,3,5-trien-1-olato)bis[(3-isopropyl-7-oxocyclohepta-1,3,5-trien-1-olato)copper(II)]-urea-acetone (1/6/2), [Cu(2)(C(10)H(11)O(2))(4)]·6CH(4)N(2)O·2C(3)H(6)O, where 3-isopropyl-7-oxocyclohepta-1,3,5-trien-1-olate is the systematic name for the hinokitiolate anion, contains three nov…
Anisotropy of the transport properties (electrical resistivity, ρ(T), thermoelectric power, S(T), and thermal conductivity, κ(T)) of the Al76Co22Ni2 (Y-Al–Ni–Co), o-Al13Co4 and T-Al72.5Mn21.5Fe6.0 complex metallic alloys was investigated experimentally. These compounds belong to the class of approximants in decagonal…
Single crystals of pentamagnesium titanium(IV) tetraoxide bis(borate), Mg(5)TiO(4)(BO(3))(2), were prepared by slow cooling of the melt from 1623 K in air. The crystal is isostructural with the mineral ludwigite (Mg(2)FeO(2)BO(3)). The Mg and Ti atoms are coordinated by six O atoms and the B atom is coordinated by thr…
We studied capacitance-voltage characteristics of ZnO thin-film transistors (TFT's), grown by metalorganic chemical vapor deposition (MOCVD). We compared two ZnO TFT's: one grown at 450 °C and the other at 350 °C. ZnO grown at 450 °C showed smooth capacitance profile with electron density of 1.5×1020 cm-3. In contrast…
Abstract For the past 10 years, the frequency of channel-control blade interference has been greater than before because of shadow corrosion-induced bow. Shadow corrosion-induced bow is caused by differential hydrogen concentration on channel sides adjacent to and away from the control blade. The differential hydrogen…
Silicon carbide and silicon carbon nitride thin films were grown by pulsed laser ablation of SiC targets in vacuum or in the presence of a controlled N2 atmosphere. The influence of the substrate temperature and of the N2 partial pressure on the optical and structural properties of the samples were investigated by mea…