Materials Literature
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Rare-earth niobate and tantalate materials are of considerable interest for use as phosphors, photocatalysts and ionic conductors. We successfully synthesized Ln3MO7 (Ln = Y, Ce, Er, Ho, Tm, Yb and Lu, M = Ta, Nb) nanophosphors by a hydrothermal method using the water-soluble Lindqvist ion polyoxometalates [HNb6O19](7…
The formation mechanism of porous anodic TiO 2 nanotubes (PATNT) still remains unclear. A special approach is proposed in this paper to investigate the forming process of nanopores in the preformed nanotubes. A novel and not easily brittle nanostructure, called triple-layered TiO 2 nanotube array, has been fabricated…
Variation of crystallographic growth direction and twinning structure of Cu nanowires (NWs) is achieved by a pulsed-current deposition method with anodic aluminum oxide templates. With increasing applied current density and decreasing deposition temperature, the grown Cu NWs showed an enhancement of (111) crystallogra…
A novel thiol functionalized zinc phthalocyanine complex (ZnPcSH) is reported in this work. This complex was conjugated to gold nanoparticles. The photophysical and photochemical properties of the complex and the conjugate were investigated. Upon conjugation a blue shift was observed from the UV-Vis spectra. The conju…
Hyperbranched poly(ε-caprolactone) (h-PCL) is synthesized via hybrid copolymerization of ε-caprolactone (CL) with glycidyl methacrylate (GMA) as the branching agent and (1-tert-butyl-4,4,4-tris(dimethylamino)-2,2-bis[tris(dimethylamino)phophoranylidenamino]-2Λ5,Λ5-catenadi(phosphazene) (t-BuP4) as the catalyst in one…
In this paper, we report the fabrication of co-assembled thin films composed of silver nanowires (NWs) and Au nanoparticles (NPs) at the liquid-liquid interface (water-chloroform) by vigorous shaking. The composition of co-assembled thin films can be controlled by adjusting the concentration of the nanosized building…
A new noncentrosymmetric borophosphate, RbPbBP2O8, has been synthesized and its high quality single crystal with dimensions up to 23 mm × 18 mm × 7 mm was successfully grown by the Kyropoulos method for the first time. It crystallizes in the tetragonal system, space group I2d with cell parameters a = 7.213(3) Å, c = 1…
A novel one-pot methodology combining anionic polymerization and polyhomologation, through a "bridge" molecule (BF3OEt2), was developed for the synthesis of polyethylene (PE)-based block copolymers. The anionically synthesized macroanion reacts with the "bridge" molecule to afford a 3-arm star (trimacromolecular boran…
Versatile efforts have been made to improve the stability of graphite/ethylene glycol (EG) nanofluids. Primitively, non-dispersible graphite nanoparticles were converted to graphite oxide nanoparticles (GONs) by acid treatment. Although GONs could be well dispersed in EG, the GONs/EG nanofluids exhibited limited stabi…
The preparation and characterization of the first corrole-azafullerene dyad are described. The photophysical and electrochemical properties of the new corrole-C59N dyad were examined and it was found that photoexcitation of the corrole unit leads to the formation of a charge separated state.
We report an environment friendly and green approach to obtain few-layer graphene by the almost instantaneous reduction of graphene oxide using Mg ribbons in acidic solution with a hydrogen spillover mechanism. The typical time is 1–5 min, which is much faster than the reduction by other metal catalysts.
An integrated cohesive band structure of carbon nanotubes (CNTs) applicable to all chirality directions (n, m), starting from the Dirac cone of a graphene nanolayer in k-space, is demarcated, in direct contrast to dissimilar chiral and achiral versions in the published literature. The electron wave state of a CNT is q…
The primary cause of fatigue damage is usually intimately related to some form of cyclic slip irreversibilities. Depending on material and details of the loading conditions, various types of fatigue crack initiation are observed. Here, typical examples of fatigue damage evolution in low and high cycle fatigue (LCF, HC…
This work investigates the effect of carbon black content on the tensile, electrical, and morphological properties of epoxy matrix. Carbon black–filled epoxy composites were obtained by mixing the desired amount of carbon black from bamboo stem (BS-CB), oil palm empty fruit bunch (EFB-CB), and coconut shell (CNS-CB) w…
In order to produce extremely high oleophobic properties with a low fluorine content, long dodecyl spacers were introduced between a polymer and fluorinated chains in order to reduce the mobility of the fluorinated chains, especially short perfluorobutyl (F-butyl) chains. We report the synthesis and characterization o…
In this perspective we first examine the rich physicochemical properties of dendritic polymers for hosting cations, anions, and polyaromatic hydrocarbons. We then extrapolate these conceptual discussions to the use of dendritic polymers in humic acid antifouling, oil dispersion, copper sensing, and fullerenol remediat…
Five new polymers based on the 4,4′-difluoro-4-bora-3a,4a-diaza-s-indacene core (BODIPY) chromophore moiety have been synthesized as low bandgap polymers for optoelectronic applications. The polymers exhibited high solubility in common organic solvents and optical bandgaps ranging from 1.7–2 eV. The materials were cha…
This review describes first the synthesis of phosphorus dendrimers having positive charges either on the terminal groups or inside their structure. Then the properties of these positively charged dendrimers as catalysts, as fluorophores, for the modification of materials and the elaboration of nano-objects, but also f…
3-D ordered macroporous (3DOM) materials have exhibited advantages in the adsorption field. Their monodisperse macropores undergo facile modification, and the interconnected cavities enhance accessibility to the active sites, while the short diffusion path of the thin pore walls accelerates material exchange. A 3DOM m…
A water vapor induced phase separation (WVIPS) electrospinning process for the preparation of core–shell nanofibers with a single capillary is described. The PAN–PVP core–shell nanofibers were fabricated by WVIPS electrospinning a polyvinylpyrrolidone (PVP)–polyacrylonitrile (PAN) homogeneous solution. The solvent sol…