Materials Literature
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Titanium dioxide thin films were deposited by DC reactive magnetron sputtering on silicon wafer and glass slide at sputtering power of 210 watt under total pressure of 5.0×10-3 mbar at different oxygen partial pressure. A pure metallic titanium target was sputtered in a mixture of argon and oxygen gases. The crystal s…
In bulk single-crystal silicon, the semiconducting diamond-to-metallic \ss{}-Sn phase transformation nucleates on defects, and is manifested by a sharp uptake in light absorption at a threshold of \ensuremath{\sim}11 Gpa, accompanied with the creation of nanosized (20--50 nm) fragmentation domains. We report on the ob…
Alginate dressings are highly absorbent, biodegradable material derived from the seaweed. They are used to cleanse wide variety of secreting lesions. They show high absorptivity which is achieved via strong hydrophilic gel formation, this limits the wound secretions, promotes wound healing and also minimizes the bacte…
Ag–ZnO composite nanocrystals were prepared by a simple hydrolysis process of zinc acetate dihydrate together with a reduction of the Ag ions in diethylene glycol. Different contents of sodium hydroxide were added into the initial reaction mixture so as to form an effective contact between Ag and ZnO. X-ray diffractio…
Using a model developed for the enzyme-catalyzed polymerization and degradation of poly(caprolactone), we illustrate a method and the kinetic mechanisms necessary to improve molecular mass by manipulating equilibrium reactions in the kinetic pathway. For these polymerization/degradation reactions, a water/linear chain…
Abstract We synthesized a series of amphiphilic mesogen‐jacketed liquid crystalline (LC) polymers with a biphenyl side‐chain mesogen containing a carboxylic acid group on one side and an octyloxy group on the other, and the number of methylene units between the biphenyl core and the exterior carboxylic acid group was…
The interactions of 5,10,15,20-tetrakis(4-sulfonatophenyl)-porphyrin (TSPP) with a quaternary ammonium modified β-cyclodextrin (QA-β-CD) and human serum albumin (HSA) protein in aqueous solutions at pH 7 were studied using steady-state, stopped-flow, and femtosecond to millisecond spectroscopy. TSPP forms 1:1 and 1:2…
Nanocrystalline Co2FeSi Heusler alloy films were deposited on single crystal lead zinc niobate–lead titanate substrates. It is revealed that this multiferroic composite exhibits very strong continuously electric field (E-field) tunable microwave frequency characteristics. With an increase of the E-field intensity from…
Abstract Co/Al Layered Double Hydroxide thin films were prepared by electrodeposition on Pt electrodes previously submitted to different electrochemical pretreatments, consisting of a large number of potential cycles (Pt‐CVT) or a cathodic polarization (Pt‐CT) in a H2SO4 solution. Their features and analytical perform…
We have studied the magnetic properties and magnetocaloric effect in La0.7Ca0.3Mn1−xCoxO3 (x = 0–0.05) prepared by conventional solid-state reaction. Magnetic measurements versus temperature revealed that both magnetization and the Curie temperature (TC) decreased gradually with increasing Co content (x); TC values ar…
Abstract Whilst bioactive coatings are commonly used as layers for non‐resorbable implant materials, such as titanium or steel to improve cell adhesion, this study investigates the application of bioactive SiO2–CaO–P2O5 on resorbable magnesium alloys (Nd2 and LANd442). The bioactive coating was applied to the magnesiu…
Dendrimers have been widely used as nanostructured carriers for guest species in a variety of applications in medicine, catalysis, and environmental remediation. Theory and simulation methods are an important complement to experimental approaches that are designed to develop a fundamental understanding about how dendr…
The induced aggregation of achiral building blocks by a chiral species to form chiral aggregates with memorized chirality has been observed for a number of systems. However, chiral memory in isolated aggregates of achiral building blocks remains rare. One possible reason for this discrepancy could be that not much is…
Our ability to directly characterize the atomic and electronic structures is crucial to developing a fundamental understanding of structure-property relationships in complex-oxide materials. Here, we examine one specific example, the misfit-layered thermoelectric material Ca${}_{3}$Co${}_{4}$O${}_{9}$, which exhibits…
The B, N, S, Si and P atoms doped single walled (5, 5) carbon nanotubes were studied by density functional theory B3LYP/3-21G (d) with the periodic boundary conditions. The ultra long tube models were calculated and the structures, energies and the band structures were obtained. The N, Si and S doped nanotubes have na…
Series of poly (vinyl alcohol)/chitosan (PVA/CS) electrospun nanofibers with different weight ratio of PVA and CS were fabricated by electrospinning method. The surface morphology, diameter, and structure of electrospun nanofibers were investigated by scanning electron microscopy (SEM). As a result of PVA and CS compo…
First examples of liquid crystalline chloro-bridged dinuclear platinum organyls carrying semiperfluorinated alkyl chains at their peripheries have been synthesised. The liquid crystalline properties were investigated using polarised optical microscopy, differential scanning calorimetry and X-ray scattering. Compounds…
The effects of electronic states and air exposure on the spectroscopic properties of manganese phthalocyanine (MnPc) have been examined. The observed features of the Q-band in the absorption spectra can be explained by intrinsic electronic properties of MnPc, i.e., the formation of singly charged molecules by charge t…
Biodegradable and biocompatible poly( p -dioxanone)–poly(tetramethylene oxide)glycol (PPDO–PTMEG) multiblock copolymers with excellent shape memory effect and mechanical properties were developed by coupling PPDO-diol and PTMEG-diol with 1,6-hexamethylene diisocyanate (HDI). The influences of chain structure, micropha…
In this research, an equimolar mixture of DCC and DMAP has been used to catalyze the L-LA ROP in DCM at r.t. Kinetically, the mixture has been proved as efficient as the DMAP alone, which has been demonstrated activating both L-LA and free alcohol during the process. The presence of the DCC improves the living charact…