Materials Literature
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Abstract A new pH sensor, which consists of a fluorophore and gold nanoparticle (AuNP) attached to each chain end of a pH‐sensitive polysulfonamide, respectively, is synthesized, and its pH sensitivity is investigated in terms of the fluorescent quenching efficiency of AuNP. Since the pH‐sensitive polymeric linker exh…
Epitaxially grown multilayer systems offer the possibility to study the influence of ferromagnetism on superconductivity in a controlled way. In this paper, we explore how the superconducting properties of high quality epitaxially grown superconductor/normal-metal/ferromagnet trilayers evolve as a function of the exch…
In present work, a new type of magnet specially designed for the thin slab casting funnel shape mould is adopted. Numerical simulations of the new type electromagnetic brake (EMBr) influences on flow field are carried out. For the computation of magnetic fields, the software ANSYS with finite element method is adopted…
Plants are a great source of medicines, especially in traditional medicine, which are useful in the treatment of various diseases. Tylophora dalzellii a medicinal member belongs to the tribe Marsdenieae of the family Asclepiadaceae.Traditionally, T. dalzellii has been used in treatment of asthma, dermatitis and rheuma…
Elemental mapping in the energy filtering transmission electron microscope (EFTEM) can be extended into three dimensions (3D) by acquiring a series of two-dimensional (2D) core-edge images from a specimen oriented over a range of tilt angles, and then reconstructing the volume using tomographic methods. EFTEM has been…
The adsorption-based separation in porous solids takes place through steric, kinetic, or equilibrium effect selectivity. In this contribution the oxygen-nitrogen separation by four porous frameworks representative of cyanometallates was studied by inverse gas chromatography. The following materials were considered: Cd…
Photoluminescence measurements on hydrogenated amorphous silicon/crystalline silicon (a-Si : H/c-Si) heterostructures have been used for two aspects of their characterization: the monitoring of the crystalline silicon wafers and of their interface properties after different steps of solar cell processing and the track…
Abstract The presence of a bulky substituent at the 2‐position of 1,3‐butadiene derivatives is known to affect the polymerization behavior and microstructure of the resulting polymers. Free‐radical polymerization of 2‐triethoxysilyl‐1,3‐butadiene (1) was carried out under various conditions, and its polymerization beh…
Abstract Carbon Black granules were modified in a rotating RF (13.56 MHz) plasma reactor fed with NH3/O2 gas mixtures, in order to graft acid (O‐containing) and/or basic (N‐containing) chemical groups and tune their surface acid/base character. X‐rays photoelectron spectroscopy was used to evaluate the surface chemica…
Abstract Microanalytical, mechanical, and corrosion studies were undertaken to investigate the effect of nano‐precipitates of Al(Scx−1Zrx) on the mechanical and corrosion characteristics of Al 2.5 alloy containing 0, 0.15, 0.3, 0.6, and 0.9 wt% of Sc with 0.15 wt% Zr. Addition of 0.3% Sc significantly increased the yi…
The chiral cation (1 S,2 S )-2-hydroxymethyl-1-benzyl-1-methylpyrrolidinium (bmpm) and a 50% mixture of this with its diastereoisomer (1 R,2 S )-2-hydroxymethyl-1-benzyl-1-methylpyrrolidinium have been prepared and tested as structure directing agents (SDAs) in the synthesis of pure-silica zeolites in fluoride medium.…
Ab initio results for the electronic properties of sodium-ammonia [Na(NH(3))(n);n=1-8] and the corresponding ionized structures [Na(+)(NH(3))(n)] are reported and compared with those for neutral ammonia clusters [(NH(3))(n)]. Emphasis was placed on the analysis of polarization effects and calculation of vertical and a…
Abstract Employing thermally responsive hydrogels, the design of an amperometric glucose sensor is proposed. The properties of the biosensor can be modulated upon changing the temperature. Homo‐ and copolymers of N‐isopropylacrylamide (NIPAm) and oligo(ethylene glycol) methacrylate (OEGMA) were prepared by electrochem…
The application of a novel biasing technique to tune frequency selective surfaces (FSS) made of patch elements is described. The methodology follows a recently developed technique where the biasing circuit of an active FSS is etched at the rear of a double sided substrate. On this occasion, the structure consists of d…
It has been suggested that medicine will change more in the next 20 years than it has in the past 2000. This may be true, as a result of advances in biotechnology and the recent emergence of nanotechnology. The concept of nanotechnology was first introduced by the quantum theorist and Nobel laureate Richard Feynman. N…
Photoluminescent properties of chalcobromide-capped octahedral hexarhenium(III) complexes with terminal bromide ligands [{Re(6)Q(8-n)Br(n)}Br(6)](n-4) (Q = Se, n = 1 ([1-Se](3-)), n = 2 ([2a-Se](2-) and [2b-Se](2-)), and n = 3 ([3-Se](-)); Q = S, n = 1 ([1-S](3-)), n = 2 ([2a-S](2-), [2b-S](2-), and [2c-S](2-)) were s…
The solidification of grey cast iron is controlled by the addition of inoculants. This is done in order to provide nucleation sites and hence facilitate the formation of eutectic cells and decrease the degree of undercooling. The number of eutectic cells and the graphite morphology affect the final properties of the c…
To improve the stability of a head-tail type polycation (PAMAM dendron-PLL), which is composed of a polyamidoamine (PAMAM) dendron head and poly(l-lysine) (PLL) tail blocks, as a gene vector against serum proteins, the PEGylation of the PAMAM dendron head was examined using physicochemical and transfection experiments…
The present work investigates volumetric swelling of Estonian Dictyonema oil shale, as a representative of black shales of the Baltoscandian basin, in 22 solvents. This study shows that kerogen of Dictyonema oil shale is characterized by a low degree of swelling indicating a highly cross-linked structure. The relativ…
Abstract A graphite nanosheet (GNS)‐Nafion modified glassy carbon (GC) electrode was prepared and used for highly sensitive and selective determination of dopamine (DA). The GNS‐Nafion/GC electrode displayed excellent electrocatalytic activities towards DA and ascorbic acid (AA). The selective determination of DA was…