Materials Literature
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The negative refraction and evanescent-wave canalization effects supported by a layered metamaterial structure obtained by alternating dielectric and plasmonic layers is theoretically analyzed. By using a transmission-line analysis, we formulate a way to rapidly analyze the negative refraction operation for given avai…
Boundaries, including phase boundaries, grain boundaries, and domain boundaries, are known to have an important influence on material properties. Here, dark-field (DF) transmission electron microscopy (TEM) and scanning transmission electron microscopy (STEM) imaging are combined to provide a full view of boundaries b…
We study the intravalley spin-orbit-mediated spin relaxation in monolayers of MoS${}_{2}$ within a two bands effective Hamiltonian. The intrinsic spin splitting of the valence band as well as a Rashba-like coupling due to the breaking of the out-of-plane inversion symmetry are considered. We show that, in the hole dop…
The optical conductivity of quasicrystals is characterized by two features not seen in ordinary metallic systems. There is an absence of the Drude peak and the interband conductivity rises linearly from a very low value up to normal metallic levels over a wide range of frequencies. The absence of a Drude peak has been…
Polyvinylidine fluoride (PVDF) is being investigated as a potential scaffold for bone tissue engineering because of its proven biocompatibility and piezoelectric property, wherein it can generate electrical activity when mechanically deformed. In this study, PVDF scaffolds were prepared by electrospinning using differ…
High throughput (combinatorial) materials science methodology is a relatively new research paradigm that offers the promise of rapid and efficient materials screening, optimization, and discovery. The paradigm started in the pharmaceutical industry but was rapidly adopted to accelerate materials research in a wide var…
Hyperbolic materials enable numerous surprising applications that include far-field subwavelength imaging, nanolithography, and emission engineering. The wavevector of a plane wave in these media follows the surface of a hyperboloid in contrast to an ellipsoid for conventional anisotropic dielectric. The consequences…
Abstract Composites play an important role as structural materials in a range of engineering fields due to their potential to combine the best mechanical properties of their constituents. In biology, composites are ubiquitous and exhibit fascinating and precise architectures at fine length scales; bone, hexactinellid…
xia2 is an expert system for the automated reduction of macromolecular crystallography (MX) data employing well trusted existing software. The system can process a full MX data set consisting of one or more sequences of images at one or more wavelengths from images to structure-factor amplitudes with no user input. To…
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A self-healing corrosion protective coating was developed using TiO2 particles and casein as pH-sensitive organic agents that is also environmentally friendly materials. A film structured of TiO2 particles was formed on a substrate (magnesium alloy) by dip-coating followed by immersion in a casein solution. Casein was…
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Communication orale
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We have developed a mechanoresponsive catalyst — a catalyst which can be switched between dormant and active states by mechanical deformation. For this purpose, we have synthesized derivatives of the well-known Grubbs metathesis catalysts that are latent due to the presence of two N-heterocyclic carbene ligands. In so…
The effect of the incorporation of self-healing functionality in CFRP composite Tjoints has been investigated. Effective self-healing of plain composites using vascular systems and thermoplastic inserts has been demonstrated previously. This work aims to apply these strategies to more complex and industrially relevant…
Al2O3 hybrid materials dispersed with Ni nano-particles (Ni/Al2O3) have received great attentions for their excellent mechanical strength and fracture toughness. However, these hybrid materials still have poor fracture toughness in comparison with metallic materials. In the ceramic-based materials, even a small surfac…