Materials Literature
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The temperature and frequency dependent damping behavior of Ni added Mn–Cu alloys were investigated. Ni addition not only increased the magnitude of the phase-transformation damping peak, but also decreased its frequency dependence. A decreased transformation temperature was found in the Ni added Mn–Cu alloys under th…
The following paper summarizes a number of recent research projects being undertaken to understand some interfacial phenomena in nanocomposite materials. These systems were obtained using a polymer as the matrix and a colloidal suspension of polysaccharide nanocrystals as the reinforcing medium.
SrTiO3∶Pr3+,Al3+ phosphor samples with varying ratios of Sr/Ti/Al were prepared by the gel-carbonate method and the mechanism of enhancement of the red photoluminescence intensity therein was investigated. The photoluminescence (PL) spectra of SrTiO3∶Pr3+ show both 1D2 → 3H4 and 3P0 → 3H4 emission in the red and blue…
Single-crystal selenium nanowires were successfully synthesized for the first time by a convenient solution-mediated transformation of polycrystalline powder, and characterized by SEM, XRD, TEM and HRTEM.
Differential scanning calorimetry (DSC) and magnetic measurements were performed to study the influence of ferromagnetic 3-d transition elements Fe and Co on structural and magnetic properties of ferromagnetic shape memory alloys Ni2MnGa. Addition of Fe or Co on the Ni sites decreases the temperature of martensitic ph…
Structures and properties of stoichiometric amorphous silicon oxycarbide glasses of various compositions and various densities are studied on network models consisting of 112–196 atoms using density functional theory. We find a perfect random network structure of the glassy phase for low carbon concentrations. In this…
Improved delivery of macromolecular drugs to solid tumor is known as the enhanced permeability and retention (EPR) effect of macromolecular drugs and lipids. We report here that a prostaglandin I2 (PGI2) analogue induces enhancement of tumor-selective drug delivery, while it decreases tumor blood flow, in a rat tumor…
The dissolution time of rigid polyurethane foam (PUF) under various glycolysis conditions was examined in a detailed investigation of the glycolysis reactivity of PUF. PUF dissolution depended on the molecular weight of glycol. Dipropylene glycol and tetraethylene glycol dissolved PUF in the shortest time among polypr…
Vanadium pentoxide thin films are prepared by the sol–gel route by dissolving V 2 O 5 powder (99.5% purity) in H 2 O 2 solution. The solution is spin‐coated on glass substrates for optical (UV–VIS–NIR) and XRD analysis, and on ITOcoated glass substrates for electrochromic measurements. The samples are then annealed at…
Unique rheological properties of combined low melt viscosity and high melt elasticity are reported for a novel series of dendritically branched polystyrenes. Unlike previous studies, dendritically branched materials having different molecular weights but all possessing the same number of generations are studied; this…
The layer thickness of anodized aluminium oxide was controlled by anodization time and voltage to obtain templates with the desired pore-length . The barrier layer at the pore bottom of anodized aluminium templates was chemically etched to make good electrical contacts for nanowires electrodeposited in the pores thus…
This paper reports the intercalation of alditols into the interlamellar spaces of kaolinite. The alditols were adonitol, a meso compound, and D-sorbitol. The grafting of hydroxy groups onto the aluminol internal surfaces of kaolinite followed the intercalation. The polyols were intercalated into kaolinite by displacin…
In practical application, an appearance of low temperature superplasticity (LSTP) is one of necessaries conditions. In this paper, to estimate an appearance and deformation mechanisms of this superplasticity, the role of grain boundary sliding (GBS), intragranular deformation and the change of microstructure during su…
Reaction of Mn(ClO4)2 with di-pyridyl ketone oxime, (2-py)2C=NOH, gives the novel cluster [Mn(II)4Mn(III)6Mn(IV)2(mu4-O)2(mu3-O)4(mu3-OH)4(mu3-OCH3)2(pko)12](OH)(ClO4)3 1. It is the only example of a 24-MC-8, and the first metallacrown with ring metal ions in three different oxidation states. Magnetic measurements sho…
The preparation and characterisation of poly-(3,4-ethylenedioxy)thiophene (PEDOT) films coated onto fluorocarbon membranes containing sulfonate groups, such as Nafion-117 and poly(styrene-4-sulfonate)-grafted poly(vinylidene fluoride) (PVDF-g-PSSA) membranes is described. The PEDOT layer is found to adhere very strong…
A review with 147 references (mainly from 1998 - 2002) covering studies on the biocompatible and (bio)degradable polymers, derivatives of lactic acid (PLA) is presented. Future perspectives of the PLA polymers technology,economical aspects of their production and applications, particularly as the commodity thermoplast…
Calcium carbonate was precipitated from carbonically pure solutions by the electrochemical method onto various metallic substrates. A special electrochemical cell was designed to allow in situ micro-Raman spectroscopy to be carried out during the scaling process with a controlled solution flux on the electrode surface…
Injuries and degenerative diseases to load-bearing soft tissues are extremely common in hospital clinics and involve all ages of the population. Tissue engineering provides a major focus for developments within this area due to the relative failure of graft and prosthetic-based strategies. On implantation, such system…
The size-dependent mechanical response of a simple model microstructure is investigated using continuum dislocation-based, Cosserat and strain-gradient models of crystal plasticity. The governing equations and closed-form analytical solutions for plastic slip and lattice rotation are directly compared. The microstruct…
Substitution of the hydrogen atoms in the 5- and 7-positions of the quinoline moiety by halogen atoms (Cl and Br) increases the near-infrared (NIR) photoluminescence intensity of the trivalent erbium ion by 30%.