Materials Literature
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Far field imaging of subwavelength magnetic objects in real time is a very challenging issue. We propose an original solution based on a planar array of closely spaced split ring resonators. Hybridization between the resonators of such metalens induces subwavelength modes with different frequencies. Thanks to these hi…
Abstract This research examined the metallurgy of production of forged excavator teeth manufactured from low‐carbon low alloy steel. A novel partial forging‐remnant‐heat hardening technology was proposed. The critical temperature of isothermal annealing for 40 Cr steel was determined experimentally to be 650°C. Produc…
Abstract Fly ash, waste product of thermal power station, generated in huge quantities has been posing problems of its disposal. As such, it contains a variety of inorganic oxide and is available in finely powder form. Attempts have been made for its utilization, as filler in engineering plastic. The fly ash (FA) fill…
Abstract In nominally undoped layered TlGaSe2 crystals the trapping centers have been investigated by photo‐induced current transient spectroscopy (PICTS). Five acceptor and donor traps have been detected. Quite large magnitudes of capture cross‐sections for donor traps at 0.23 and 0.45 eV have been determined. The de…
Boron and carbon, either in elemental form or when combined, are structurally very different. They are indeed complementary, and the weaknesses of one can be complemented by the strengths of the other, and vice versa. The structural complementarity can be readily observed in the shape of [X n H n ] y– (X = C or B) com…
We use a path integral quantum Monte Carlo method to simulate excitons and biexcitons in core/shell nanocrystals with Type-I, Type-II, and quasi-Type-II band alignments. Quantum Monte Carlo techniques allow for all quantum correlations to be included when determining the thermal ground state, thus producing accurate p…
We show how the magneto-phonon resonance, particularly pronounced in sp 2 carbon allotropes, can be used as a tool to probe the band structure of multilayer graphene specimens. Even when electronic excitations cannot be directly observed, their coupling to the E 2g phonon leads to pronounced oscillations of the phonon…
We show that the opacity of a clean multilayer graphene flake depends on the helicity of the circular polarized electromagnetic radiation. The effect can be understood in terms of the pseudospin selection rules for the interband optical transitions in the presence of exchange electron–electron interactions which alter…
Synthetic substrates with defined chemical and structural characteristics may potentially be prepared to mimic the living ECM to regulate cell adhesion and growth. Hydrogels with cell-adhesive peptides (0.28 ± 0.03 nmol peptide cm(-2) , TTA-R-0.5; and 0.91 ± 0.12 nmol peptide cm(-2) , TTA-R-2.0) and/or micro-scaled to…
Photodimerization of a TTF derivative gives rise to a dimeric molecule with a face-to-face structure that in its mixed-valence state exhibits a through space intramolecular electron transfer, both in solution and linked to a surface.
High-resolution x-ray photoelectron spectroscopy (XPS) was performed on the surface of 0.7 at.$%$ Nb-doped SrTiO${}_{3}$(001) decorated with self-assembled linear nanostructures termed dilines, trilines, and tetralines. All three nanoline types share a common side-row feature, while the triline is shown to contain Ti…
The effect of a small substitution of Mn with Al in TbMnO${}_{3}$ has been studied. We report results of heat capacity, magnetization, and dielectric constant studies in TbMn${}_{1\ensuremath{-}x}$Al${}_{x}$O${}_{3}$ compounds ($x$ \ensuremath{\le} 0.1). Al has the same valence as substituted Mn but is nonmagnetic and…
Abstract In this study, flexible polyurethane (PU) nanocomposite foams were prepared by in situ polymerization. The effects of incorporation of nanoparticles on the morphological and structural developments and the relation between this development and mechanical properties of the PU foam were demonstrated. The effect…
Silicon carbide‐based fibers have been shown to be sensitive to delayed failure at temperatures <1200°C in air as a result of slow crack growth. The present article investigates the resistance to fatigue of Hi Nicalon SiC ‐based filaments in the intermediate temperature range where creep is ineffective. Statistical di…
Speciation of ferriprotoporphyrin IX, Fe(III)PPIX, in aqueous solution is complex. Despite the use of its characteristic spectroscopic features for identification, the theoretical basis of the unique UV-visible absorbance spectrum of μ-[Fe(III)PPIX](2)O has not been explored. To investigate this and to establish a str…
The field of metamaterials and the formalism of transformation optics have provided a prescription for constructing artificial dielectrics with unique properties such as light trapping and cloaking. Here, we describe a different approach to creating an inhomogeneous artificial medium, based on waveguide techniques, wh…
Contributed equally to this work. To further understand the origin of the double thermal transitions of collagen in acidic solution induced by heating, the denaturation of acidic soluble collagen was investigated by micro-differential scanning calorimeter (micro-DSC), circular dichroism (CD), dynamic laser light scatt…
Raman and surface‐enhanced Raman scattering spectroscopy were used to follow the chemical modification of quercetin (QUC) on silver nanoparticles. Different metallic systems were fabricated to check the influence of the interface, in terms of electric charge or total available surface, on the catalytic change undergon…
We report on absolute magneto-transmission experiments on highly doped quasi-free-standing epitaxial graphene targeting the classical-to-quantum crossover of the cyclotron resonance. This study allows us to directly extract the carrier density and also other relevant quantities such as the quasiparticle velocity and t…