Materials Literature
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Just add liquid and stir: Dispersions of metal sulfide nanoparticles (CdS, ZnS, PbS, and MnS) can be prepared directly by mixing the corresponding bulk solid with an appropriate ionic liquid, without further additives or solvents (see scheme). The selection of the ionic liquid is critical for the viability of this nan…
The order–disorder phase transition of magnesium lithium titanate solid–solution (1−x)Li2TiO3–xMgO (0 ≤ x ≤ 0.5) ceramics prepared by conventional solid-state processing has been examined. The phase and structural analysis was carried out using electron diffraction, neutron diffraction and high-resolution transmission…
The electrostatically driven self-assembly of oppositely charged gold nanoparticles (Au NPs) and polystyrene/poly(N-isopropylacrylamide) (PS/PNIPAm) core-shell microgels (CSMs) has been investigated. The co-assembly was accomplished by addition of smaller Au NPs to CSMs in dilute conditions up to a number ratio of abo…
In this paper, we demonstrate a facile route to carbon-supported nanoparticles of a gold/palladium alloy which exhibit catalytic activity for the oxidation of benzylic alcohols, using the biopolymer chitosan. The biomolecule acts triply as a structure-directing agent, anti-sintering matrix and in situ source of carbon…
This manuscript describes the versatile fabrication and characterization of a novel composite membrane that consists of a porous alumina support, a 100 nm thick nanoporous gold coating, and a selective poly(5-(perfluorohexyl)norbornene) (pNBF6) polymer that can be grown exclusively from the nanoporous gold or througho…
The penultimate reaction in the oxidative degradation of nicotinate (vitamin B(3)) to fumarate in several species of aerobic bacteria is the hydrolytic deamination of maleamate to maleate, catalyzed by maleamate amidohydrolase (NicF). Although it has been considered a model system for bacterial degradation of N-hetero…
Random attachment of sugar molecules to synthetic polymers is an important strategy to induce biodegradability in these polymers. The present study successfully employs “click” chemistry to introduce low levels of sugar molecules onto styrene–butadiene–styrene (SBS) copolymer, a widely used commodity polymer which is…
Undoped and TiO2-doped lead phosphate glasses were prepared. Ultraviolet (UV)–visible and Fourier transform-infrared (IR) absorption spectra of the prepared samples were measured before and after being subjected to doses of 30 and 60 kGy of gamma irradiation. The parent undoped lead phosphate glass reveals charge tran…
Novel optical field-stabilised defect structures are presented in nematic liquid crystals as produced by Laguerre–Gaussian optical beams. Our modelling study is based on the phenomenological free energy approach. To mimic generic experiments, Laguerre–Gaussian optical beams of various helical indices are applied to a…
The new ligand, tris(5-methylpyrazolyl)methane (1), has been prepared by the reaction of n-butyl lithium with tris(pyrazolyl)methane followed by trimethylation of the tetralithiated species with methyl iodide. The BF(4)(-), ClO(4)(-), and BPh(3)CN(-) salts of the Fe(II) complex of this ligand were also synthesized. Th…
Abstract Water-soluble fluorinated polymer nanoparticles (PNPs) with well-defined structure were successfully prepared as a 19F MRI contrast agent by living radical copolymerization of 2,2,3,3-tetrafluoropropyl methacrylate (TFPMA) and tert-butyl methacrylate (tBMA) initiated from a dendritic macroinitiator. The obtai…
Abstract A novel inorganic‐organic hybrid compound, allylammonium hexabromobismuthate(III), (C 3 H 5 NH 3 ) 3 BiBr 6 (ABB), was synthesised and its structure determined by means of single‐crystal X‐ray diffraction studies at four temperatures (280, 230, 170 and 100 K). At 100 K, the compound crystallises in the monocl…
We have measured the dose dependence of the degree of amorphization of titanite, CaTiSiO(5). Titanite is an often metamict mineral which has been considered as a matrix for the encapsulation of radiogenic waste, such as Pu. The amorphous fraction p of geologically irradiated samples (ages between 0.3 and 1 Ga) follows…
Samples of polycrystalline zirconium were irradiated with fast neutrons (E>0.1 MeV) in Pakistan Research Reactor-1 at 423 K to fluences 1.22×1020, 4.87×1020 and 9.70×1020 n/m2. Mechanical properties such as yield stress (YS), ultimate tensile stress (UTS), percentage elongation, stress relaxation rate and hardness of…
The photoprotection of porphyrins is of immense importance for their utilisation in several photo-related applications. In the present study, we have employed gold nanoparticles (AuNPs) to photoprotect a porphyrin, magnesium tetraphenylporphyrin (MgTPP). Absorption, fluorescence and X-ray photoemission spectroscopic (…
The deposition of monosodium urate (MSU) crystals in synovial fluid is a classic clinical symptom of the joint disease gout. In previous work (CrystEngComm, 2011, 13, 1111–1117), it was reported that crystal growth occurs by an island deposition mechanism in 2–10 mM urate solutions under simulated physiologic conditio…
In this paper we have grown pure Ba 0.25 Sr 0.75 TiO 3 (BST) and BST doped by Ferric Oxide Fe 2 O 3 (BFST) with doping variations of 5%, 10%, and 15% above type-p Silicon (100) substrate using the chemical solution deposition (CSD) method with spin coating technique at rotation speed of 3000 rpm, for 30 seconds. BST t…
A high-temperature superconducting (HTS) DC cable system has attracted a great deal of interest from the view point of low loss, dense structure and large capacity compared to HTS AC cable system. It has a HTS cable and a termination. A HTS DC cable system consists of a conductor, cooling system and electrical insulat…
We demonstrate the electrochemical etching of gold in a solution of hydrofluoric acid and dimethylformamide (DMF) to fabricate nanoporous gold (NpAu) films. Compared to de-alloyed NpAu, the electrochemically etched NpAu exhibits controllable pore size and etching depth by adjusting the etching conditions. We propose a…
We consider a theoretical model for a binary mixture of colloidal particles and spherical emulsion droplets. The hard sphere colloids interact via additional short-ranged attraction and long-ranged repulsion. The droplet-colloid interaction is an attractive well at the droplet surface, which induces the Pickering effe…