Materials Literature
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Dielectric and ohmic losses in metamaterials are known to limit their practical use. In this paper, an all-electronic approach for loss compensation in metamaterials is presented. Each unit cell of the meta-material is embedded with a cross-coupled transistor pair based negative differential resistance circuit to canc…
A ternary mixed oxide Zn1−xMgxO has been doped with aluminium to create a range of transparent conducting oxides with tunable refractive index as well as work function. Conductive material was synthesised up to a magnesium concentration of x = 0.45, although the conductivity is reduced compared to standard ZnO:Al. The…
The need to have composite materials that are renewable has lead to materials scientists researching on natural fibres. To minimize environmental pollution research into rice husk has been on for a period of time now. In this research cashew nut resin reinforced rice husk composite was fabricated at different particle…
A new stable sterically hindered o-quinone annelated with a 1,2-dithiete ring was prepared by using mild conditions. The skeleton of the compound comprises diolate and dithiolate functions that have the potential to bind metals leading to the corresponding complexes. The reactivity of this compound as a ligand with re…
A prolonged reverse bias (RB) stress forcing a short-circuit current through a dye solar cell, corresponding to the harshest test a shadowed cell may experience in real conditions, can cause the RB operating voltage VRB to drift with time, initially slowly but accelerating for VRB < (−1.65 ± 0.15)V when gas bub…
Abstract The aim of this study was to compare the effects of different silica grades on the structure and morphology of isotactic polypropylene (iPP)/silica composites to better understand their structure–property relationships. Isotactic polypropylene composites with 2, 4, 6, 8 vol % of added silica fillers differing…
Spintronic devices are very important for future information technology. Suitable materials for such devices should have half-metallic properties with only one spin channel conducting. Nanostructures have played an important role in this aspect. Here, we report the realization of robust half-metallic ferromagnetism vi…
As Ca(BH 4 ) 2 · n NH 3 ( n = 1, 2, and 4) tends to release ammonia rather than hydrogen when heated in argon, an aided-cation strategy via combining these compounds with Mg(BH 4 ) 2 is employed to advance their dehydrogenation. It shows that the interaction between the two hydrogen storage systems, based on a promote…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation K. Vanstreels, C. Wu, P. Verdonck, M. R. Baklanov; Intrinsic effect of porosity on mechanical and…
Ordered ZnO nanorods-based heterojunction light-emitting diodes (LEDs) have been fabricated by adopting few-layer graphene as a current spreading layer. The strong emission at low currents infers the high interfacial quality between GaN and ordered ZnO nanorods, and the current spreading effect resulting from graphene…
Residual stresses in LiNbO3 and LiTaO3 epitaxial thin films were evaluated taking into account Li nonstoichiometry by means of Raman spectroscopy and x-ray diffraction. The epitaxial films were grown on C-cut sapphire substrates by pulsed injection metal organic chemical vapour deposition. Clamping of the epitaxial fi…
We consider the organization of spherical gold nanoparticles from monomers to dimers to trimers and use the finite difference time domain (FDTD) method to explore their utility as substrates in surface-enhanced spectroscopy (SES). We investigate homodimers with 20 nm diameter ( d ) particles as the monomers and symmet…
A two-dimensional surface lattice of cylindrical topology obtained via perturbing the inner surface of a cylinder is considered. Periodic perturbations of the surface lead to observation of high-impedance, dielectric-like media and resonant coupling of surface and non-propagating volume fields. This allows synthesis o…
We describe a mechanism in which low-energy phonons of the SiC/graphene interface modify the separation between the buffer layer and the graphene overlayer, resulting in a deformation potential and hence charge carrier scattering. We determine this deformation potential ab initio, and then calculate transport properti…
The imine bond, a kind of dynamic covalent bond, is used to bind two bolaform amphiphiles together with spacers, yielding H-shaped supra-amphiphiles. Micellar aggregates formed by the self-assembly of the H-shaped supra-amphiphiles are observed. When pH is tuned down from basic to slightly acidic, the benzoic imine bo…
Abstract The dielectric recovery in high-voltage circuit breakers after interruption of high-current amplitudes was investigated experimentally in a test device. Various current amplitudes were tested, which cover a typical range of practical interest. Simulations with computational fluid dynamics together with electr…
Abstract Impact polypropylene copolymer (IPC) has been known as a multiphase material in which an ethylene‐propylene (EP) random copolymer, serves as toughening component, is dispersed in the homo‐polypropylene hPP matrix. The crystalline EP copolymer (cEP) is another component whose role and microstructural effect on…
The spin order in cubic perovskite SrFeO${}_{3}$ and BaFeO${}_{3}$ under high pressure is studied by density functional theory (DFT) calculation with local spin density approximation plus Hubbard $U$ (LSDA+$U$). At ambient pressure, A-type and G-type helical spin orders are almost degenerate in BaFeO${}_{3}$ whose lat…
Abstract In this study, randomly oriented short jute/bagasse hybrid fiber‐reinforced epoxy novolac composites were prepared by keeping the relative volume ratio of jute and bagasse of 1:3 and the total fiber loading 0.40 volume fractions. The effect of jute fiber hybridization and different layering pattern on the phy…
Abstract C 60 ‐boron dipyrromethene (BODIPY) dyads ( C ‐ 1 and C ‐ 2 ) were prepared as heavy‐atom‐free organic triplet photosensitizers for triplet‐triplet annihilation (TTA) based upconversion. BODIPY‐C≡C‐triphenylamine chromophores were used as the light‐harvesting antennas and C 60 was used as the singlet energy a…