Materials Literature
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Three novel 2-carboxamide-8-hydroxyquinoline derivatives wrap helically around trivalent lanthanide ions to form monometallic 3 : 1 complexes possessing strong NIR emission.
Emulsion-templated porous polymers (PolyHIPEs) based on polystyrene have been prepared and used for in vitro 3D cell culture of osteoblastic cells. It has been found that the method employed to prepare the emulsion precursor, namely the method of aqueous phase addition, has a significant influence on the homogeneity o…
A new method has been developed for continuous and real-time assays for enzymes using complexes of conjugated polymers/enzymatic substrates by electrostatic interactions, where the products are the substrate fragments and the free chains of conjugated polymers. The charged substrates and enzymes as a proof of concept…
Advanced composites made using high strength fibers such as graphite and Kevlar fibers have replaced steel and other metals in many applications from aerospace to sports gear and from satellites to automobiles because of their significantly higher specific strength and stiffness. Both fibers and resins used in these c…
With looming environmental problems and the global energy crisis, fully green composites of natural fibers and biodegradable resin have increasingly attracted research interest because of their advantages of low cost, renewable resource usage, and biodegradability. Recent studies and developments are reviewed in this…
Ordered mesoporous carbonaceous spheres with variable structures have been successfully prepared by using phenolic oligomers as a carbon precursor and amphiphilic triblock copolymers as a template via a one-step aerosol-assisted organic-organic self-assembly method.
The properties of solid oxide fuel cell (SOFC) anode functional layers prepared by impregnation of ceria and catalytic metals into porous yttria-stabilized zirconia (YSZ) have been examined for operation at . By varying the thickness of the functional layer, the conductivity of the ceria-YSZ composite was determined t…
The encapsulation of homogeneous chiral catalysts, e.g. Co(Salen) and Ru-TsDPEN, in the mesoporous cage of SBA-16 is demonstrated; the encapsulated catalysts show performance as good as that of the homogeneous catalysts, and can be recycled for more than 10 times without significant loss of catalytic performance.
We present a comparison among several fully-vectorial methods applied to a basic scattering problem governed by the physics of the electromagnetic interaction between subwavelength apertures in a metal film. The modelled structure represents a slit-groove scattering problem in a silver film deposited on a glass substr…
Breakthrough development of TiO2 thin film with non-UV activated superwettability and antifogging behaviours that remained stable, even after 15 cycles of continuous wetting and drying, have been successfully fabricated via multilayer assembly of TiO2 nanoparticles and polyethylene glycol (PEG).
Anthraquinone derived oxalamide gelator 1 forms with aromatic solvents and alcohols very stable gels which selectively respond to the presence of fluoride anion by colour change and/or gel-to-sol transition.
AbstractBioactive coatings are in high demand to control cellular functions for numerous medical devices. The objective of this in vitro study was to characterize for the first time fibroblast (fibrous scar tissue forming cells) adhesion and proliferation on an important polymeric biomaterial (silicone) coated with ti…
AbstractMulti-walled carbon nanotubes (MWNT) have been synthesized by chemical vapour decomposition (CVD) of acetylene over Rare Earth (RE) based AB2(DyNi2) alloy hydride catalyst. The as-grown carbon nanotubes were purified by acid and heat treatments and characterized using powder X-ray diffraction, Scanning Electro…
AbstractPhosphomolybdate has been employed simultaneously as the oxidizing agent for the monomer polymerization and the reduced polyoxometalate is used as reducing agent for the reduction of metal ions. The composites thus obtained have been characterized and may have many potential applications.
AbstractThe kinetics of nanowhiskers growth is studied theoretically taking into account the adatom diffusion from the surface to the top of needle. An exponential growth with time is expected for the initial stages of the process, when the lengthlof the whisker is smaller than the average diffusion length λ of adatom…
AbstractIn this paper, the mechanical response and deformation behavior of anodic aluminum oxide (AAO) were investigated using experimental nanoindentation and Vickers hardness tests. The results showed the contact angle for the nanoporous AAO specimen was 105° and the specimen exhibited hydrophobic behavior. The hard…
AbstractSimple nanoporous alumina matrix modification procedure, in which the electrically highly insulating alumina barrier layer at the bottom of the pores is replaced with the conductive layer of the gold beds, was described. This modification makes possible the direct electron exchange between the underlying alumi…
AbstractLow energy Ar+ion sputtering, typically below 1,200 eV, of GaAs at normal beam incident angle is investigated. Surface morphology development with respect to varying energy is analyzed and discussed. Dot-like patterns in the nanometer scale are obtained above 600 eV. As the energy approaches upper eV range reg…
AbstractWe have investigated the ultra-fast carrier dynamics in Molecular Beam Epitaxy (MBE)-grown InAs/InGaAs/GaAs quantum dots (QDs) emitting at 1.3 μm by time resolved photoluminescence (TRPL) upconversion measurements with a time resolution of about 200 fs. Changing the detection energies in the spectral region fr…
AbstractTime and resource constraints necessitate increasingly early decisions to advance or halt pre-clinical drug discovery programs. Early discovery or “tool” compounds may be potent inhibitors of new targets, but all too often they exhibit poor pharmaceutical and pharmacokinetic properties that make early assessme…