Materials Literature
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Thermoluminescence (TL) glow-curves measured using an exponential heating function (EHF) in constant temperature hot gas readers, cannot be analysed using the existing single TL glow-peak equations derived assuming a linear heating rate. In the present work single TL glow-peak equations, which were recently derived as…
The application of in situ FBRM and PVM in monitoring the erythromycin dilution crystallization process and the transformation of erythromycin solvates is introduced. Influences of seeding strategies on nucleation and growth were examined in acetone aqueous solutions. It is noted by FBRM monitoring that the dominant c…
The SmC phase of 4'-octyloxyphenyl-4-octyloxybenzoate has been examined in light of recent reports that this phase is chiral. The results suggest that two varieties of chiral domains in LC cells of the phenylbenzoate are indeed formed, driven by interactions with surfaces. Application of sensitive probes for chirality…
Atmospheric pressure discharges are routinely used to functionalize rough surfaces of commodity polymeric materials to enhance surface properties. High value polymeric materials, such as scaffolding for tissue engineering, must also have their surfaces treated to achieve similar functionality. The techniques used to a…
A new tolane-base liquid crystal, 4'-heptyl-3-fluoro-4-isothiocyanatotolane (7TOLF), and a biphenyl-base nematogen, 4'-heptyl-3-fluoro-4-isothiocyanatobiphenyl (7BF), have been investigated for the first time to determine their electro-optical behaviour and third order non-linearity using the static Kerr effect method…
A nonmagnetic compound, [NO(2)BzPy][Au(mnt)(2)] (NO(2)BzPy(+) = 1-(4'-nitrobenzyl)pyridinium; mnt(2-) = maleonitriledithiolate), was synthesized and characterized structurally, which is isostructural with [NO(2)BzPy][Ni(mnt)(2)] that is a quasi-one-dimensional magnet and possesses a spin-Peierls-like transition with J…
Thermoplastic vulcanizates (TPVs) or dynamic vulcanizates containing finely dispersed micron-size cross-linked rubber particles in a thermoplastic matrix exhibit performance properties of the conventional vulcanized rubbers, however, they can be processed as thermoplastics. The basic objective of the present study is…
A low-temperature method for growing (0001)-oriented one-dimensional ZnO nanopillars using electrodeposition in a simple zinc nitrate aqueous solution without any template is presented. The 20–100 nm diameter ZnO nanopillars emitted ultraviolet light at around 3.30 eV due to the recombination of the bound excitons and…
Dosimeters of MgB4O7 doped with Dy and Na have many valuable features such as high sensitivity, tissue equivalence, low fading, non-requirement of annealing and insensitivity to light. Thermoluminescence studies of Dy and Na doped MgB4O7 samples showed that a glow emission peaked at about 195 degrees C. In this study,…
Cycloolefin copolymers of ethylene and norbornene, with norbornene content in the range from 36 to 62 mol %, were studied with respect to the thermal, thermodynamic, and rheological properties using differential scanning calorimetry, pressure-volume-temperature, and dynamic mechanical measurements. All copolymers obey…
The concept of complementary media, which cause negative refraction and make perfect lenses, was first introduced to electromagnetic waves. This paper extends it to general waves by expressing the complementarity in terms of a transfer matrix. As an example, complementary media of electrons are discussed theoretically…
This paper reports on the result of space charge evolution in cross-linked polyethylene (XLPE) planar samples approximately 220 µm thick. The space charge measurement technique used in this study is the pulsed electroacoustic method. There are two phases to this experiment. In the first phase, the samples were subject…
The relaxation mechanisms of a quantum nanomagnet are discussed in the framework of linear response theory. We use a spin Hamiltonian with a uniaxial potential barrier plus a Zeeman term. The spin, having arbitrary $S$, is coupled to a bosonic environment (phonons). From the eigenstructure of the relaxation matrix, we…
We experimentally studied the in-plane thermal and electrical properties of a suspended platinum nanofilm in thickness of 15 nm. The measured results show that the in-plane thermal conductivity, the electrical conductivity and the resistance-temperature coefficient of the studied nanofilm are much less than those of t…
Abstract Reactions of rubidium or barium salts of the ortho ‐selenostannate anion, [Rb 4 (H 2 O) 4 ][SnSe 4 ] ( 1 ) or [Ba 2 (H 2 O) 5 ][SnSe 4 ] ( 2 ) with Zn(OAc) 2 or ZnCl 2 in aqueous solution yielded two novel compounds with different ternary Zn/Sn/Se anions, [Rb 10 (H 2 O) 14.5 ][Zn 4 ( μ 4 ‐Se) 2 (SnSe 4 ) 4 ]…
Undoped and copper doped zinc oxide (ZnO) thin films have been prepared on glass substrates by spray pyrolysis technique. The films were doped with copper using the direct method by addition of a copper salt (CuCl 2 ) in the spray solution of ZnO. Variation of structural, electrical, optical and thermoluminescence (TL…
Abstract A terbium complex Tb(PMIP) 3 (PhCN), namely tris(1‐phenyl‐3‐methyl‐4‐isobutyl‐5‐pyrazolone)‐terbium‐(pyrazino[2,3‐ f ][1,10]phenanthroline‐2,3‐dicarbonitrile), was synthesized as a reagent for anions. Compared with Tb(PMIP) 3 (H 2 O) 2 , the fluorescent quantum yield of Tb(PMIP) 3 (PhCN) was reduced because t…
We report the formation of continuous spatial gradients in the density of grafted semifluorinated chains on silicon oxide surfaces by vapor-phase diffusion of semifluorinated silanes. We quantify the orientations of the nematic liquid crystal (LC) 4-cyano-4‘-pentylbiphenyl on these surfaces as a function of local surf…
We present detailed electron spin resonance investigations on single crystals of the low-dimensional quantum magnet TiOCl. The anisotropy of the $g$ factor indicates a stable orbital configuration below room temperature and allows us to estimate the energy of the first excited state as $0.3(1)\phantom{\rule{0.3em}{0ex…
The effects of alumina (Al2O3) and zinc oxide (ZnO) fillers on the curing characteristics, thermal and mechanical properties of silicone rubber were studied. Rheometer results indicate that the incorporation of ZnO fillers retards the curing process, whereas an enhancement in cure rate was observed for Al2O3. Higher m…