Materials Literature
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Remarkably stable polyion complex micelles with narrow size distribution result from the supramolecular assembly of clicked anionic PEG-dendritic block copolymers with oppositely charged polymers.
A small and fast self-holding 2 × 2 optical switch using phase change material is proposed. This switch is based on a directional coupler in which a short waveguide made of a phase-change material (PCM) is sandwiched between two Si waveguides. The characteristics of the proposed switch were simulated by a beam propaga…
The self-assembly of Zn-bisporphyrin tweezers induced by coordination to enantiopure 1,2-diaminocyclohexane features supramolecular chirality induction and inversion processes that are exclusively controlled by the stoichiometry of the assembled complexes.
The electrochemical polymerization of aniline in a hydrophobic room-temperature ionic liquid and the spectroelectrochemical characterization of the formed film are presented. The polymerization occurs without the presence of acid in 1-butyl-2,3-dimethylimidazolium bis(trifluoromethanesulfonyl)imide (BMMITFSI), leading…
In this paper, we report the study of the distribution (regular or irregular distribution or segregation) of two distinct functional groups located within the pore channels of ordered mesoporous organosilicas. For that purpose, we have chosen two probes, both of them depending on the proximity of two organic groups. O…
With ever increasing concern on oil prices and energy conservation, there is a fast growing interest in hybrid vehicles globally. Currently, all hybrid vehicles, including micro, mild and full hybrids, adopt internal combustion engines which are inefficient in general. The corresponding waste heat of exhaust gas const…
CuInS2 nanoparticles (NPs) have been synthesized via thermal decomposition of metal-thiolate in high boiling temperature solvent. This method does not require toxic, unstable and expensive raw materials. Nearly monodispersed NPs with average diameter ranging from 1.8 to 2.8 nm are obtained. The NPs are found to be com…
The iridium(III) complex Ir(ppy)2(phen5f) [ppy = 2-phenylpyridinato-N,C2′, and phen5f = 4,4,5,5,5-pentafluoro-1-(1′,10′-phenanthrolin-2′-yl)-pentane-1,3-dionate] has been synthesised and used as “complex ligands” to make heteronuclear d–f complexes by the attachment of Ln(NO3)3·xH2O at the vacant coordination sites in…
BACKGROUND: Hydroxycamptothecin (HCPT) has been shown to have activity against a broad spectrum of cancers. In order to enhance its tissue-specific delivery and anticancer activity, we prepared HCPT-loaded nanoparticles made from poly(ethylene glycol)-poly(gamma-benzyl-L-glutamate) (PEG-PBLG), and then studied their r…
Quantum chemical studies on the molecular hydrogen adsorption in a six-membered carbon ring has been undertaken to mimic the adsorption process in carbon nanotubes, considering the fact that the six-membered carbon ring is found to be one of the basic units of the carbon nanotubes and fullerenes. Our results reveal th…
A mesoporous tungsten carbide (WC) with high surface area (138 m2 g(-1)) has been synthesized at 700 degrees C using a modified template replicating route in which the pore entrances were sealed under external pressure after the W source impregnation. X-Ray diffraction (XRD), transmission electron microscopy (TEM), fi…
In this paper we present the application of carbon nanotubes as unique sorbents for the fabrication of microtraps for the nanoscale adsorption/desorption of relatively large semivolatile organic molecules. The microtrap application requires high adsorption capacity as well as easy desorbability; the latter being criti…
A novel method to tune surface wettability rapidly and reversibly has been developed by ion exchange of the counterions at the surface of a multilayer film assembled via electrostatic interaction.
HK alloy is a member of the heat resistant cast alloy family (H-Series) steels. They are widely used in the petrochemical industry for components requiring enhanced high temperature properties. Microstructural changes occurring at high temperature clearly affects its mechanical properties. These properties have been s…
Diblock copolymers with one block of poly[((2-dimethylamino)ethyl methacrylate)-co-(glycidyl methacrylate)] P(DMAEMA-c-GMA) and another of poly(pentachlorophenyl acrylate) (PPCPA) (P(DMAEMA-c-GMA)-b-PPCPA) were synthesized via consecutive atom transfer radical polymerization (ATRP). Electrospinnning of P(DMAEMA-c-GMA)…
Magnesium organohaloaluminate in tetrahydrofuran [ 0.25 mol / L Mg ( AlCl 2 EtBu ) 2 / THF , Et : C 2 H 5 , Bu : C 4 H 9 ] is an electrolyte solution that is able to deposit and dissolve magnesium electrochemically and reversibly at room temperature. It has been reported that the electrochemical window is ruled by Lew…
Conducting polymers can combine the electronic characteristics of metals with the engineering properties of polymers. Polypyrrole (PPy), polythiophene (PTh) and polyaniline (PAni) are common examples of conducting polymers which can be electrodeposited from their respective heterocyclic monomers. The applications of t…
In this paper, the frictional behavior of a neutral hydrogel, polyvinyl alcohol (PVA), on smooth solid substrates with various levels of hydrophobicity have been investigated in water using a strain-controlled parallel-plate rheometer. For the sliding velocity dependence of friction, we detected a distinct friction tr…
Synthetic, structural and magnetic studies of a new Fe(II) single chain magnet are reported.
Multi-temperature synchrotron powder diffraction and differential thermal analysis have revealed an enantiotropic order–disorder phase transition in Rb8Sn44□2 and Cs8Sn44□2 at 353 and 363 K, respectively. The low-temperature phases crystallize with a 2 × 2 × 2 superstructure of the conventional type-I clathrate. At hi…