Materials Literature
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We imaged polarization rotation of transmitted light in 1D Periodic Plasmonic Structures (PPS) fabricated on thin metal coated dielectric substrate. Several PPS of 50% duty cycle and extremely low aspect ratio (height to width ratio) of 0.1 were designed using rigorous coupled wave analysis to exhibit transmission pla…
We reveal new and remarkable manifestations of the Fano resonances in high-refractive-index all-dielectric photonic nanostructures. First, we revisit the conventional problem of light scattering by an infinite dielectric rod and observe the existence of cascades of Fano resonances in the optical cross-section, which w…
We report on variation in the refractive index of amorphous and isotropic TiO2 thin films grown by Atomic Layer Deposition (ALD) in nano optical devices. ALD-TiO2 films of thicknesses ≤ 200 nm exhibiting negative thermo-optic coefficient (TOC) due to decrease in refractive index with temperature, owing to inherent hyd…
We investigate electrical photoresponse of multilayer graphene decorated with CdSe/ZnS quantum dots. It was found that photoresponse of these hybrid structures depends on quantum dot photoluminescence quantum yield. We demonstrate in uence of external factors (light exposure and treatment with ammonia vapors) on photo…
Recently, the use of stereospecific chiral stabilising molecules has also opened another avenue of interest in the area of quantum dot (QD) research. The main goal of our research is to develop new types of technologically important quantum dot materials containing chiral defects, study their properties and explore th…
An equivalent static force is usually used to represent vessel-impact load exerted on bridge structures in current bridge design codes. However, this static procedure using the code-prescribed loads cannot consider dynamic effects (e.g. inertial force related to superstructure mass). Hence, the vessel-impact responses…
The silks of Orb-Weaver spiders (family Araneidae) are emerging as fascinating optical materials due to their biocompatibility, ecological sustainability and mechanical robustness. Natural spider silks are mainly spun as double cylinders, with diameters ranging from 0.05 to 10 μm, depending on the species and maturity…
Military facilities, buildings such as embassies or nuclear power plants must be protected against effects and impacts from terrorist attacks or accidents. In the course of new building or upgrading existing structures the protective function against gun fire or debris due to explosions should be fulfilled with small…
ABSTRACT Europium‐containing cholesteric liquid crystalline polymers were graft copolymerized using poly(methylhydrogeno)siloxane, cholesteryl 4‐(allyloxy)benzoate (M1), cholesteryl acrylate (M2), and a europium complexes monomer (M3). The chemical structures of the monomers were characterized by Fourier transform inf…
Abstract A novel technique to activate tantalum pentaoxide is introduced. An electrochemical reductive treatment in acidic solution is found to be an effective method for transforming the Ta5+ in Ta2O5 to Ta<5+, in such a way that it is active for hydrogen evolution. This opens a new route to the development of metal…
There exists the threshold-sensitive dynamical transition between the uniform and the periodic growth modes in the domain growth of ascorbic acid crystals from its aqueous supersaturated solution film. The crystal growth induces the solution flow. Humidity controls the fluidity of the solution. The solution flow varie…
We prove that the tetranuclear oxalato-bridged complex Re3(IV)Ni(II) demonstrating the single molecule magnet behavior is a good anisotropic spin Heisenberg model. Our comprehensive analysis, based on an exact diagonalisation technique, genetic algorithm ideas, and EPR resonances, leads to a unique set of the single-i…
-substitution showed similar binding compared to the unsubstituted ring. These findings demonstrated that nanoparticle-protein interaction can be controlled by the tuning the spatial orientation and the relative electronic properties of the aromatic substituents. This improved biomolecular recognition provides opportu…
A numerical study for damage of RC columns under demolition blasting has been carried out and the results were compared with available experimental work. Basic considerations for the finite element method of the LS-DYNA Program are introduced. Equations of state models as well as three constitutive material models (th…
As service rates increase, the corroded rebar stands out as a major problem for existing reinforced concrete (RC) columns in a corrosion-inducing environment. The corrosion of stirrups is more serious than that of longitudinal bars, due to smaller clear concrete cover and smaller diameter. It deteriorates the confinem…
Electrostatic forces-the strongest interparticle forces outside of the nucleus-account for the stability of matter over a broad range of length scales, from atoms to macromolecules to the myriad materials that surround us. Colloidal particles (nanometers to microns in size) and polymers can become charged in a polar s…
Abstract Two new borates, Sr8MB18O36 (M = Zn or Cd) with expected formulas representing the Sr:M ratio of 8:1, were synthesized. Their structures were determined by single-crystal X-ray diffraction. They both crystallize in the same space group R−3c and possess isolated [B18O36]18− anionic group. In this work, not onl…
Epitaxial SmCo 5 /PrCo y ( y = 5 and 8) films with PrCo y sublayers of varying thicknesses are prepared on a Cr buffered MgO(1 1 0) substrate by pulsed laser deposition, and their structural and magnetic properties are examined. These bilayer films grow epitaxially with a single orientation of the magnetic easy axis,…
The Riera approach is the most commonly used method for modelling the global effects of a deformable missile on a rigid engineering structure. The Riera approach assumes the normal impact of a rigid perfectly plastic missile that only crushes at the cross-section adjacent to the target. It also neglects the effects of…
In this article, we discuss the fabrication and characterization of a 32-channel array of single-walled carbon nanotube thin film (SWCNT-TF) chemiresistor sensors. By simply varying the SWCNT-TF device geometry from a length-to-width (L/W) ratio of 1.5:1-15:1, the device switching characteristics were tuned, which pro…