Materials Literature
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Superhydrophobic films are produced by a simple and low cost method. Silica (SiO2) nanoparticles are dispersed in solutions of Rhodorsil 224, a commercial poly(alkyl siloxane) which is used for the protection of outdoor cultural heritage objects, and the suspensions are sprayed on glass surfaces. It is shown that the…
Abstract The results of conventional powder X-ray diffraction and 29Si solid-state MAS NMR spectroscopy were used to investigate the distribution of Si atom defects in a silicalite optimized for the vapor-phase Beckmann rearrangement process. Powder diffraction data of the dehydrated sample were collected for carrying…
A series of copolymers containing oxadiazole and fluorene cromophores was synthesized by polycondensation of a diacid chloride incorporating one diphenylsilane linkage and a mixture of aromatic diamines containing oxadiazole and fluorene moieties. The solubility, thermal behavior, and photoluminescence ability of the…
Lady’s Finger Fibres for Possible Use as a Reinforcement in Composite Materials Md. Moniruzzaman1, Mohd. Maniruzzaman1, M. A. Gafur2, and C. Santulli3 ∗ 1Department of Applied Chemistry and Chemical Technology, Islamic University, Kushtia 7003, Bangladesh 2Bangladesh Council of Scientific and Industrial Research (BCSI…
Live and treated materials from three populations of diatoms collected in Italy, Slovakia and Spain, identified in previous inventories as Navicula stroemii HUST. sensu KRAMMER et LANGE-BERTALOT, were examined under light and scanning electron microscopy. The analyses highlighted the typical single H-shaped plastid, c…
A water-soluble nitrosyl complex of iron {Fe2[S(CH2)2NH3]2(NO)4}SO4·2.5H2O, belonging to a structural type ‘μ2-S’ and containing a ligand of natural origin, cysteamine, was synthesised and studied by X-ray crystallography, IR and Mössbauer spectroscopy.
Abstract Polyurethane elastomers based on polyester diols and aromatic or aliphatic diisocyanates can be used as vibration dampers and isolation materials. Two series of cross‐linked polyurethanes with various hard segment structures and different amounts were prepared and thermomechanical properties of these material…
Bifunctional periodic mesoporous organosilicas (BPMOs) with thiophene- and isocyanurate-bridging groups were prepared by one-pot co-condensation of 2,5-bis(triethoxysilyl)thiophene and tris[3-(trimethoxysilyl)propyl]isocyanurate precursors in the presence of a poly(ethylene oxide)-poly(DL-lactic acid-co-glycolic acid)…
This work investigates 2.5 – 30 nm gold nanoparticles immobilized on Al 2 O 3 . It shows that they possess high activity and stability in selective hydrogenation of phenylacetylene into styrene from a phenylacetylene-styrene mixture at 423 K. Strong dependences of the activity and selectivity of Au/ Al 2 O 3 on the go…
Abstract A simple and environmentally‐friendly processing method was used to prepare thermoplastic starch (TPS)/ montmorillonite (MMT) nanocomposites. X‐ray diffraction (XRD) and transmission electron microscopy (TEM) demonstrated that glycerol could enlarge the d ‐spacing and destruct the layered structure of MMT eff…
Undoped and TiO 2-doped soda lime-phosphate glasses were prepared. UV-visible, infrared, Raman and electron spin resonance spectroscopic studies of the prepared samples, with varying compositions and increasing TiO 2 contents, were measured before and after successive gamma irradiation. The parent undoped glass reveal…
Converter transformers play an important role in the high-voltage DC power transmission system. The insulation of these transformers is stressed by both AC and DC voltages. Particle contamination is one of the major problems in insulation structures, as they generate partial discharges. A methodical experimental study…
Self-cleaning hydrophilic and hydrophobic properties of TiO2-based thin films on glass substrates have been investigated in this study. The addition of SiO2 into TiO2 can increase the wettability of films and maintain the hydrophilic state for a long time even in the dark. The contact angle of water on deposited films…
We report a 2-step approach to prepare tetragonal perovskite PbZr(0.1)Ti(0.9)O(3) submicro/nano wires in gram scale and with over 95% wire content. Non-perovskite precursor wires were first fabricated by hydrothermal processing. A subsequent annealing in a PbO atmosphere at 600 degrees C converted these wires into per…
MCM-41, a mesoporous silica nanomaterial with a high surface area for adsorption of small molecules, is a potential new type of delivery vehicle for therapeutic and diagnostic agents. In this report, we show that MCM-41 adsorbs the front-line anticancer drug carboplatin, [Pt(CBDCA-O,O')(NH3)2] (CBDCA=cyclobutane-1,1-d…
We analyze the near-band-edge photoluminescence of electrochemically deposited ZnO nanowires and directly correlate the photoluminescence properties with the carrier concentration in the nanowires as determined from electrochemical impedance spectroscopy. We find a donor density of 8×1019 cm−3 in the as-deposited nano…
The results of study of the surface chemistry of detonation nano-diamonds of various types by means of the temperature-programmed desorption mass spectrometry are presented. The efficiency of surface modifications by means of severe acidic treatment and thermal oxidation as a way to unification of functional surface l…
In 2 O 3 , SnO 2 and ZnO nanostructure have been synthesized by thermal evaporation method and their photoluminescence have been investigated to explore the light emission mechanism. All of the three as-grown metallic oxide nanostructures have a strong blue or green photoluminescence at room temperature. However the b…
We report an approach for fabricating a tunable wettability surface by electroless gold plating on poly(dimethylsiloxane) (PDMS). A two-layer structured gold film with a tight layer and a loose layer can be obtained on the surface of a PDMS chip when the PDMS chip is immersed in a gold plating solution at 30 degrees C…
Following experimental determination of kinetic parameters governing the up-conversion of light by triplet-triplet annihilation (TTA-UC), we develop a kinetic model to determine the conditions required for efficient up-conversion. We discuss the assumptions underpinning statistical arguments for an upper limit to TTA-…