Materials Literature
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Lanthanum and yttrium compounds with composition RE2M2O7 (RE=Y, La; M = Ti, Zr, Hf) have high density and high Z and can be doped with Ce onto the La and Y sites. This makes these compounds good candidates for Ce activated scintillator gamma-ray detectors particularly for the hafnate systems which have a very high den…
We have measured the temperature dependence of the physical aging rate β of thick (2430 nm) and thin (29 nm) polystyrene (PS) films supported on silicon using a new streamlined ellipsometry procedure that we have recently developed. The physical aging rates β( T ) for the ∼30 nm thick films are found to be reduced at…
In this study, linear homopolypropylene/clay (HPPC) nanocomposite foams with a high expansion ratio of about 18 and a high cell density of about 1.7 × 10 8 cells/cm 3 were produced using an extrusion foaming method with CO 2 as the physical blowing agent. The result was much better than pure HPP foams with expansion r…
We report herein a method for the ultra-trace detection of TNT on p-aminothiophenol-functionalized silver nanoparticles coated on silver molybdate nanowires based on surface-enhanced Raman scattering (SERS). The method relies on π-donor-acceptor interactions between the π-acceptor TNT and the π-donor p,p'-dimercaptoaz…
The structural phase diagram of the Pb-free ferroelectric ${({\text{Na}}_{1/2}{\text{Bi}}_{1/2})}_{1\ensuremath{-}x}{\text{Ba}}_{x}{\text{TiO}}_{3}$, $x<0.1$, has been explored by Raman spectroscopy at temperatures from 10 to 470 K. The data provide clear evidence for a proposed temperature-independent morphotropic…
This study investigated the effect of SWCNTs' length on their antimicrobial activity to bacterial cells in suspensions. Three different lengths of SWCNTs (<1 μm, 1-5 μm, and ∼5 μm) were tested. At same weight concentration, longer SWCNTs exhibited stronger antimicrobial activity. The fluorescence and SEM images reveal…
Hyperbranched polymers (HBPs) are highly branched macromolecules with a three-dimensional dendritic architecture. Due to their unique topological structure and interesting physical/chemical properties, HBPs have attracted wide attention from both academia and industry. In this paper, the recent developments in HBP sel…
Ultraviolet (UV) photodetection has drawn a great deal of attention in recent years due to a wide range of civil and military applications. Because of its wide band gap, low cost, strong radiation hardness and high chemical stability, ZnO are regarded as one of the most promising candidates for UV photodetectors. Addi…
A technique has been developed to analyse the test results from the Kawabata Evaluation System (KES) and automatically generate printouts which give an indication of fabric sewability. A simplified method for producing a fingerprint of the fabric has also been developed. A computer software has been created which auto…
Nanostructures such as carbon nanotubes have a broad range of potential applications such as nanomotors, nano-oscillators and electromechanical nanothermometers, and a proper understanding of the molecular interaction between nanostructures is fundamentally important for these applications. In this paper, we determine…
The process of cell nucleation and growth in polycarbonate (PC)/polystyrene (PS) blends was investigated by altering the foaming temperature. It was found that cell nucleation and growth first took place in PS droplets. Microcellular samples with the average cell size of 2.4–8.4 µm, cell density of 3.20 × 109–9.68 × 1…
Abstract Single‐wall carbon nanotubes (SWCNTs) have been added to high molecular weight poly(γ‐benzyl‐ L ‐glutamate), or PBLG, to evaluate their effects on the polymer's shear piezoelectricity. While the addition of SWCNTs increased various PBLG physical properties such as electrical conductivity, dielectric constant,…
Pneumatic yarn splicing is a well‐established technique for joining two yarn ends together by means of a blast of compressed air in a device known as a splicing chamber. Earlier research done in 2007 by Webb and colleagues optimised external splicer parameters, such as air pressure and duration, for maximum splice str…
The new high-spin iron(II) complex, [Fe(C(12)H(10)N(6))(2)(H(2)O)(2)](C(8)H(3)N(4)S)(2) or [Fe(abpt)(2)(H(2)O)(2)](tcnsme)(2) [where abpt is 4-amino-3,5-di-2-pyridyl-4H-1,2,4-triazole and tcnsme is the 1,1,3,3-tetracyano-2-methylthiopropenide anion], consists of discrete [Fe(abpt)(2)(H(2)O)(2)](2+) dications, where th…
The aim of the study is to develop new preform structures and processes to use in the technical textile and composite industries. Multiaxis and orthogonal three‐dimensional (3D) circular woven preforms and weaving methods have been developed. The multiaxis structure has five yarn sets as (±)bias, axial, circumferentia…
The effects of annealing atmosphere (argon or oxygen) on Zn nanoparticles (NPs), embedded in silica glass, synthesized by implanting 50 keV ZnO − ions to a fluence of 7 × 10 16 cm −2 have been studied. Optical absorption (OA) measurements carried out on the as-implanted samples have been found to result in a surface p…
Tunnel diode oscillator-based technique has been used for quantum oscillations spectra determination of a quasi-two dimensional organic metal in pulsed high magnetic fields of up to 55 T. It is demonstrated that reliable field-dependent quantitative data can be obtained in the case of complex oscillatory spectra provi…
The quantity of short fibers in a cotton sample is an important cotton quality parameter. Short cotton fibers have detrimental impacts on yarn production performance and yarn quality. There are different parameters for characterizing the amount of short fibers in a cotton sample. The most widely used parameter is shor…
In this work, two different techniques to modify polymeric surfaces are compared: laser irradiation and ion implantation. The treated polymers were samples of ultra high molecular weight polyethylene. The irradiation treatment was performed by utilizing two different laser sources operating in the UV and IR range by a…
In 1976, B. J. Carroll derived the equation to show that a symmetric liquid droplet sitting on a thin cylindrical fiber would acquire a bell shape at equilibrium. We have extended his derivation to describe a drop located at the top end of a vertical, cylindrical fiber. By minimizing the Gibbs free energy of the drop…