Materials Literature
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Recent single molecule experiments have suggested the existence of a photochemical funnel in the photophysics of conjugated polymers, like poly[2-methoxy-5-(2'-ethylhexyl)oxy-1,4-phenylenevinylene] (MEH-PPV). The funnel is believed to be a consequence of the presence of conformational or chemical defects along the pol…
Two new Co(ii)-Cr(iii) phosphonate clusters with [Co(II)(4)Cr(III)(4)] and [Co(II)(8)Cr(III)(4)] cores have been synthesized by a displacement reaction from a pre-formed heterometallic carboxylate cage. Magnetic studies show overall antiferromagnetic interactions are present in these clusters.
Abstract The 37‐amino acid polypeptide islet amyloid polypeptide (IAPP), or amylin, is found as amyloid aggregates in the islets of Langerhans in patients with type II diabetes. Herein, we report an efficient microwave assisted solid phase peptide synthesis of amylin (IAPP). The most efficient synthesis used double an…
Recent interest in SrTiO 3 stems from its wide applicability in microwave devices based on the tunable characteristics of dielectric constant in the microwave frequency range. It is obvious that for any such application, SrTiO 3 should have a ferroelectric Curie temperature (T C ) close to room temperature or higher.…
cone -25,27-Dipropyloxy-26,28-dioxo-calix[4]arene titanium (IV) dichloride (1) has been assessed in the ring-opening polymerisation of rac -lactide ( L,D -LA). The polymers formed (PLDA) turned out to display an isotactic stereoblock microstructure (determined by NMR) despite the fact that the catalyst has<mml:math xm…
This paper describes a method for patterning of continuous monolayer gold nanoparticle films to form circular morphology at the pentanol–water interface. Time-dependent coalescence process indicates that the sintering between nanoparticles is the main reason for inducing the shrinking and splitting of the continuous m…
Single crystalline gallium-doped ZnO films have been hydrothermally grown at using a ZnO seed layer on (111) substrates. High resolution X-ray diffraction showed an epitaxial relationship between the ZnO single crystalline film and the spinel substrate with an out-of-plane orientation of and an in-plane orientation of…
Luminescence enhancement of the rare-earth ion Eu(III) in supramolecular hydrogels formed by self-assembly of the hydrogelator N,N-dibenzoyl-L-cystine (DBC) was observed by fluorescent optical microscopy and steady-state luminescence. The spectra of varying temperature luminescence showed that luminescence intensities…
Nanocrystalline and microcrystalline ZnO powders are synthesized by the pyrolysis of organic zinc salts in the presence of a reducing catalyst represented by a porous cellulose carrier. The specimens obtained are characterized by X-ray powder diffraction, energy dispersive analysis, scanning electron microscopy, and p…
Phase-pure solid solutions of [Co(terpy)(2)][BF(4)](2) and [M(bpp)(2)][BF(4)](2) (M = Fe or Ru, bpp = 2,6-dipyrazol-1-ylpyridine) have been prepared. The spin-state of the [Co(terpy)(2)](2+) dopant is modulated by the spin-state of the [Fe(bpp)(2)](2+) centres in the iron-containing materials.
Much concern has been raised over the health consequences of workers exposed to carbon nanotubes. In order to characterize multi-wall carbon nanotubes (MWCNT) suspended in a phosphate-buffered saline containing 0.1% Tween 80 for an intratracheal instillation study. Length and width distributions of the MWCNT fibers, d…
The magnetic behaviour of Ni 2 Mn 1+ x Sn 1− x ferromagnetic (FM) shape memory alloys are investigated with a focus on the exchange coupling and the ground state magnetic properties. Large exchange bias in the field cooled state of x = 0.36, 0.44 alloys is observed, which strongly varies with the cooling field. The ob…
Vertically self-aligned ZnO nanorods and nanotubes are fabricated on Si substrates by atomic layer deposition with the assistance of anodic aluminum oxide at . These nanostructures are equal in height, isolated, and vertical to the Si substrate. With 550 deposition cycles, we can fabricate regular arrays of ZnO nanoro…
Metal ions released in 1% lactic acid solution from combinations of titanium fixtures with superstructures made of dental precious metal alloys (dental alloys) and titanium and differences based on the fixing method were investigated. In combinations of titanium with dental alloys, the level of Ti release was influenc…
Luminol could react with acidic Pd-Ag colloid to yield a novel chemiluminescence, which could be reversibly controlled by the pH of Pd-Ag colloid. This offers a novel way to design smart nanomaterials with pH-controlled catalysis.
Reported herein is the study of the preparation, characterization, and electrochemical activity of a silver-polymer-carbon composite electrode in a nonaqueous cell. An enhanced oxygen reduction activity for the composite electrode in a nonaqueous, aprotic solvent is demonstrated, relative to uncoated glassy carbon or…
Chitosan composite films were obtained from acetic or lactic acid chitosan solutions and additives such as glycerol, oleic acid, linoleic acid, polyoxyethylenesorbitan monolaureate (Tween 20) and polyoxyethylenesorbitan monooleate (Tween 80) in order to see the influence of the additive on the film formation, microstr…
We report a new method for the green synthesis of ZnO nanoparticles. A new leucine-based diamine amphiphile was synthesized and self-assembled, which in the presence of Zn(2+) ions assembled into nanofibers, that efficiently formed ZnO nanoparticles upon heating in the presence of Zn(CH(3)COO)(2). Further, these ZnO n…
The functional properties of “TiNi–stainless steel” bimetal composite produced by explosion welding were studied. The influence of the ratio of the TiNi layer thickness to the total thickness of the sample as well as the influence of preliminary deformation on the recoverable strain and a temperature of shape memory e…
Conductive polymers can be utilized as unique functional elements in future intelligent biomaterials required for tissue engineering, cell stimulation and drug delivery. Research in these areas could be limited by established methods of conductive polymer synthesis which do not provide an easy route towards large scal…