Materials Literature
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The use of long-lifetime emitting lanthanide(III) chelate labels or probes together with time-resolved fluorometry in detection provides a method to generate sensitive bioaffinity assays. However, the use of stable chelates demands very complicated optimization of the chelate structure. A great number of chelates have…
Iodine oxidation of B(3)H(8)(-) in glyme solution to produce (glyme)B(3)H(7), followed by displacement of the coordinated glyme by reaction with anhydrous ammonia provides a safe and convenient preparation of ammonia triborane, NH(3)B(3)H(7) (1). X-ray crystallographic determinations and DFT computational studies of b…
Abstract New applications of both pea hull fiber (PHF) and PHF‐derived nanowhiskers (PHFNW), isolated from PHF by acid‐hydrolysis, as fillers in starch‐based biocomposite films were explored in this work. Two series of films were prepared by blending pea starch (PS), respectively, with PHF and PHFNW. The effects of PH…
The signal-to-noise ratio (SNR) for real-time biosensing with liquid-gated carbon nanotube transistors is crucial for exploring the limits of their sensitivity, but has not been studied thus far. Although biosensing is often performed at high transconductance where the device displays the largest gate response, here w…
Cu@Cu 2 O core–shell nanoparticles on a-C : H thin films are prepared by co-deposition of RF-sputtering and RF-PECVD. Samples with different copper concentrations are grown. The copper content of films increases with reduction in initial pressure and rises with increasing RF power. When the Cu/C ratio reaches 0.5, the…
The influence of nitrogen on tensile properties of 316L stainless steels has been studied for nitrogen levels of 0·07, 0·11, 0·14 and 0·22 wt-%. Tensile tests have been carried out at several temperatures in the range 300–1123 K. Nitrogen was found to be beneficial for tensile strength at all the test temperatures. Yi…
ZnO nanorods and nanodisks were synthesized by solution process using zinc chloride as starting material. The morphology of ZnO crystal changed greatly depending on the concentrations of Zn(2+) ion and ethylene glycohol (EG) additive in the solution. The effect of thermal treatment on the morphology was investigated.…
Coordinative self-assembly of zinc(II) ions and polytopic polyiminofluorene-tpy ligands is used to prepare electrochromic films with thickness in the nanometer range. The films can be switched between yellow, red, and blue, and exhibit switching times of 500 ms, high contrast, and high stability.
In this paper, well-defined vaterite hollow spheres and amorphous barium carbonate microrods are synthesized in Proteus mirabilis /urea solution. The urease-generated bacterium Proteus mirabilis is able to convert urea to ammonia and CO 2, thereby leading to the precipitation of metal carbonate in Proteus mirabilis /u…
The impact of macroscopic sample inhomogeneity and contact placement on the measured carrier type and concentration in the widely used van der Pauw–Hall method is investigated using finite-element analysis of the electrostatics. A variety of likely macroscopic inhomogeneities in mobility or carrier concentration acros…
We investigate the calorimetric liquid-glass transition by performing simulations of a binary Lennard-Jones mixture in one through four dimensions. Starting at a high temperature, the systems are cooled to T = 0 and heated back to the ergodic liquid state at constant rates. Glass transitions are observed in two, three…
Porous 3D metal-nanoparticle assemblies with selectable morphologies are synthesized. Biosilica templates (diatom frustules) are first converted into silicon replicas via magnesiothermic reduction. Electroless metal deposition, followed by silicon dissolution, then yields metal-nanoparticle assemblies with the 3D temp…
A comprehensive characterization (thermal, spectroscopic, crystallographic, temperature- and moisture-dependent stability, and transition characteristics) of solvates of aripiprazole (APZ) with methanol (1:1), ethanol (2:1), dichloroethane (2:1), and a monohydrate is presented. To gain insight into packing similaritie…
Micro-sized decaoctahedron BaZrO 3 powders were synthesized by means of a hydrothermal microwave method at 140 °C for 40 min. The X-ray diffraction, Raman, UV−visible, and inductively coupled plasma atomic emission (ICP-AES) spectroscopy, as well as measurements of photoluminescence (PL) emission, were used for monito…
To investigate the electrochemical properties of purpurinimide dyads and electron transfer sites for their reduction and oxidation, a series of dimers with variable C-C linkages were synthesized. For the preparation of these novel structures, the formyl and 2-formylvinyl substituents were regioselectively introduced a…
Lead-free (Na 0.52 K 0.48− x )(Nb 0.93− x Sb 0.07 )O 3 – x LiTaO 3 (NKNS7– x LT) solid solution piezoelectric ceramics were investigated in terms of their phase transition behaviour and various electrical properties. The polymorphic phase transition of NKNS7 compositions with an orthorhombic structure was shifted down…
The bending effect of individual zinc oxide (ZnO) nanowires on photoconducting behavior has been investigated by an in situtransmission electron microscopy (TEM) method. By increasing the nanowire bending, the photocurrent of ZnO nanowire under ultraviolet illumination drops dramatically and the photoresponse time bec…
Photoluminescence (PL), radioluminescence (RL), and thermoluminescence (TL) investigation of Y2O3:Bi nanophosphors prepared by solution combustion synthesis using urea, glycine, and hexamethylenetetramine (HMT) as fuels was carried out. The as-prepared nanopowders have increasing crystallinity and average crystallite…
We show that the angular range of the transmission through magnetic barrier structures can be efficiently controlled in single-layer and bilayer graphenes and this renders the structure’s efficient wavevector filters. As the number of magnetic barriers increases, this range shrinks, the gaps in the transmission versus…
The syntheses and characterization of several complexes of Mn(II) with cyclen derivatives having variable numbers of pendant N-acetic acid or N-acetamide arms are reported. X-ray crystallographic results are presented for Mn(DOTAM)Cl(2) x 2 H(2)O (monoclinic C2/c, a = 18.5798(15), b = 13.6006(11), c = 10.5800(8) A, be…