Materials Literature
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We have explored the effects of 120 MeV Si9+ ion beam irradiation on the electrical, structural and capacitance properties of HClO4 doped polyaniline conducting polymer electrodes. The swift heavy ion (SHI) irradiated conducting polymer films exhibited upto 70% increase in crystallinity and dc conductivity with improv…
Dynamical properties of photoexcited states are theoretically studied in a one-dimensional Mott insulator dimerized by the spin-Peierls instability. Numerical calculations combined with a perturbative analysis have revealed that the lowest photoexcited state without nearest-neighbor interaction corresponds to an inter…
Characterization and application of calcium ferrites based solid solutions containing active oxygen species for catalysts in propylene total and methane partial oxidation has been studied. The calcium ferrite based solutions containing brownmillerite phases showed a structural transition based on the migration of oxid…
Purpose To provide information about technical data; wear behaviour of worn rotor parts in mining industry and for the other application of ferrous alloys. Design/methodology/approach Wear behaviour of the various filler wires were tested (tensile, hardness, and wear) and compared with each other in the light of micro…
Ceramic matrix composites (CMC’s), particularly silicon carbide (SiC) fiber-reinforced SiC-matrix (SiC/SiC) composites, have been studied for advanced nuclear energy applications for more than a decade. The perceived potentials for advanced SiC/SiC composites include the ability to operate at temperature regimes much…
Substituted polyaniline poly(o-anisidine) and copoly{aniline-(o-anisidine)} were synthesized by the oxidative chemical polymerization method. Sulfuric acid was used as the dopant during the polymerization process. Synthesized polymers were subjected to the spectroscopic, X-ray and thermal analysis. Formation of differ…
Microfabrication techniques were combined with fractal algorithms to realize polymeric scaffolds resembling capillary networks. The scaffolds were seeded with human endothelial cells in monoculture as well as in coculture with human fibroblasts. To enhance the process of angiogenesis, endothelial cells were transfecte…
A new wavefunction-based method of electronic band structure calculation of solids is proposed based on the transcorrelated (TC) method. In the TC method, a Jastrow–Slater-type correlated wavefunction is used as a trial function. Similarity transformation of the Hamiltonian with respect to the Jastrow correlation func…
Recently we have proposed that stress distribution of a subject can be visualized by utilizing a novel mechanoluminescence phenomenon that can give intense visible light emission by application of mechanical stress. As the luminescence intensity is proportional to the time-variation of strain energy in the elastic reg…
Multilayer-coated La0.67Sr0.33MnO3/La0.67Ca0.33MnO3 (LSMO/LCMO) films can be prepared using cost-effective polymer assisted deposition, keeping a constant LSMO/LCMO volume ratio. By changing the thickness of the individual layers (see figure), the temperature of maximum resistance and the magnitude of magnetoresistanc…
Freestanding silver nanorods (Ag-NWs) sandwiched between poly(allyamine hydrochloride)/polystyrene sulfonate polyelectrolyte bilayers, (PAH/PSS)10PAHAg(PAH/PSS)10PAH, and suspended over a 150 μm opening (see figure) have been prepared. At a Ag-NW volume fraction of 22.5%, the membrane is both mechanically robust and e…
This article presents the material modeling and experimental characterization of SMA rod and tube actuators undergoing pure torsional deformations. The investigation of the torsional characteristics of SMAs is carried out in order to gain a fundamental understanding of the behavior of SMA torsional actuators. The prop…
NiTi shape memory alloy (SMA) products appeared to the medical markets in 1980’s, their global market being more than US$ 130 billion in 2002. In most medical applications material must be biocompatible. NiTi offers the bodytemperature activated shape memory effect (SME), superelasticity (SE) and the damping capacity,…
Gelatin, derived from the collagen triple helix, is the most widely used functional biopolymer and a prototype for studies of physical gels. Gelatin gels have also served as models for soft biological tissue in efforts to elucidate the molecular basis of the magnetic relaxation phenomena that govern magnetic resonance…
A comparative study of quantum confinement of electrons and phonons in silicon nanocrystals produced by laser-induced etching on a silicon (Si) substrate and continuous wave (cw) laser-induced crystallization in a-Si:H film on a quartz substrate is presented here. Raman line shapes of optical phonons confined in Si na…
ZnO and ZnO:Mn (at Mn incorporation rates between 1 and 5%) films were obtained at a substrate temperature of 350 ± 5 °C by the ultrasonic spray pyrolysis technique. Optical, structural and morphological properties of ZnO films as a function of Mn amount were discussed. Transmittance spectra, x-ray diffraction (XRD) p…
Abstract Two manganese metallacrowns [Mn 10 (pnhz) 10 (DMF) 4 (H 2 O) 6 ] · 10.5H 2 O · MeOH · DMF ( 1 ) and [Mn 6 (anhz) 6 (DMF) 2 (H 2 O) 4 ] · 6DMF ( 2 ), (H 3 pnhz = 3‐hydroxy‐ N ‐phenyl‐2‐naphthalenecarbohydrazide, H 3 anhz = N ‐acyl‐3‐hydroxy‐2‐naphthalenecarbohydrazide) have been prepared by the reactions of tw…
Carbon-containing refractory bricks are used extensively in the steel industry worldwide. Since the first generation became commercially available in the 1970’s, their processing, microstructures and properties have been improved dramatically, and the service lives of industrial furnaces have thus been extended substa…
Tying up loose ends: Oligoamide thread molecules can spontaneously transform into open knots, whose terminal functional groups can subsequently be chemically linked to form closed, cyclic knots (see scheme; left: threads; middle: open knots; right: molecular knots; X=N, C).
Results of a theoretical study of the electronic properties of $(\mathrm{Si})\mathrm{Ge}$ and $(\mathrm{Ge})\mathrm{Si}$ core-shell nanoparticles, homogeneous $\mathrm{SiGe}$ clusters, and $\mathrm{Ge}\ensuremath{\mid}\mathrm{Si}$ clusters with an interphase separating the Si and Ge atoms are presented. In general, $(…