Materials Literature
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Most solution electrospinning processes were performed at the ambient temperature. Few hot polymer solutions were used to produce electrospun nanofibers in the traditional electrospinning process, much less in electrospinning processes with a free liquid surface. In this presentation, poly(vinyl alcohol) solutions wit…
Eu2O3-functionalized ZnO/palygorskite was synthesized in a two-step method, and was thoroughly characterized. Energy was transferred from Eu2O3 to ZnO, but not from ZnO to Eu2O3, in contrast to literature reports. The interaction between Eu2O3 and ZnO directly influenced the energy transfer process. Eu2O3 was sporadic…
A new hybrid pyrazine-bipyridine ligand L (C26H20N6) and its complexes with Mn(NO3)2, Mn(ClO4)2, MnCl2 and MnBr2 have been synthesised. By the self-assembly of L and Mn(II) ions three different kinds of supramolecular complexes have been obtained: binuclear baguette complex [Mn2L(H2O)6](NO3)4·2.5H2O 1 and tetranuclear…
We synthesized a novel thermo-responsive discotic nematic hydrogel. This liquid crystalline polymer nanocomposite was fabricated using extremely high-aspect-ratio (ξ = diameter/thickness ∼ 103) zirconium phosphate (ZrP) nano-sheets embedded into a polymeric network. These nano-sheets were immersed into a solution of c…
Porous polymeric scaffolds have been much investigated and applied in the field of tissue engineering research. Poly(ester urethane) (PEU) scaffolds, comprising pores of 1-20 μ m in diameter on one surface and ≥ 200 μ m on the opposite surface and in bulk, were fabricated using phase separation method for hypopharynge…
True stress-true strain curves of naturally spun viscid line fibres retrieved directly from the spiral of orb-webs built by Argiope trifasciata spiders were measured using a novel methodology. This new procedure combines a method for removing the aqueous coating of the fibres and a technique that allows the accurate m…
Problems of making winding tape from fibers or rovings and features of its impregnation with binding agents or solutions are considered. Technological parameters and the rate and time of impregnation of unidirectional fibrous tape moving through a bath are determined.
This study deals with the preparation of multi-shaped nanoscale gold crystals under synthetically simple, green, and efficient conditions using a seed-mediated growth approach in the presence of hyaluronic acid (HA). These highly biocompatible multi-shaped gold nanocrystals were examined to evaluate their catalytic an…
Spontaneous formation of curved nanorods is generally unexpected, since curvature introduces strain energy. However, electron microscopy shows that under hydrothermal conditions, some nanorods grown by oriented attachment of small anatase particles on {101} surfaces are curved and dislocation free. Molecular dynamics…
The oxidation of 2-hexen-1-ol and 1-hexen-3-ol with air has been studied using supported gold, palladium and gold–palladium catalysts. The main aim was to determine if either the alcohol or alkene functional group can be oxidised selectively. However, based on the reaction products observed (2-hexen-1-ol forms 2-hexen…
In this work, an experimental approach was used for measuring birefringence of thermotropic liquid crystal materials at different wavelengths in the visible region by using speckle interferometry. Also the values of the refractive indices were measured for these thermotropic liquid crystal materials in isotropic and l…
Thin films of copper titanium oxide were deposited by metal organic chemical vapour deposition technique from the synthesized single solid source precursor, copper titanium acetylacatonate Cu [Ti(C5H7O2)3] at the deposition temperature of 420°C. The deposited films were characterized using Rutherford Backscattering Sp…
Hollow gold nanoparticles (HGNs) are unique materials having properties which can be beneficial in controlled and traceable drug delivery and molecular imaging. In the recent past various methods have been developed for the synthesis of these HGNs, the most widely used method employed the galvanic replacement reaction…
Model test-systems for biochemical determination of glucose and cholesterol are designed by covalent coupling of enzymes to the surface of modified nanodiamonds (MND). In both cases after immobilization on MND the enzymes exhibit activity and catalyze the formation of a colored product in the chain of successive enzym…
Peptide–polymer nanofibrous networks can be developed to obtain hybrid systems providing both functionalities of peptides and stability and processability of the polymers. In this work, a bio-inspired heavy metal binding peptide was synthesized and noncovalently immobilized on water-insoluble electrospun hydroxypropyl…
Long channel carbon nanotube transistor (CNT) can be used to overcome the high electric field effects in nanoscale length silicon channel. When maximum electric field is reduced, the gate of a field‐effect transistor (FET) is able to gain control of the channel at varying drain bias. The device performance of a zigzag…
Aluminum titanate (Al2TiO5) green bodies were prepared from mixture of titania and alumina powders with different particle sizes by conventional slip casting (CSC), pressure slip casting (PSC) and cold isostatic pressing (CIP). Precursor-powder mixtures were evaluated with respect to the powder properties, flow behavi…
We report a direct observation of the negative thermal expansion in an iron-based perovskite oxide SrCu3Fe4O12 by using a thermomechanical analyzer and strain gauge. Reversibility and small thermal hysteresis in the negative thermal expansion temperature range demonstrate that the negative thermal expansion of this co…
OXIDATION OF ETHANOL ON Rh CATALYSTS. The partial oxidation of ethanol on -Al 2 O 3 , CeO 2 , ZrO 2 and Ce x Zr 1-x O 2 supported rhodium catalysts was investigated by Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS). The catalysts were characterized by temperature-programmed reduction (TPR) and cy…
This study demonstrated the electrochemical deposition of Mn-doped ZnO films under hydrothermal conditions at 130°C in 50% v/v DMSO-H 2 O mixture. X-ray diffraction analysis showed that the deposition of the ZnO structures was along (002) direction. However, the presence of Mn 2+ affected the thickness of ZnO structur…