Materials Literature
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We investigate the effect of strain-induced intrinsic exchange bias field (HEB) on the magnetization rotation process in a nominally “single” layered La2/3Sr1/3MnO3 (LSMO) film. The intrinsic exchange bias appears when the LSMO film is grown on LaAlO3 substrate. The HEB is proved to be an effective approach to tuning…
Nanoclusters of d10 metal ions, including silver, gold, and copper ions anchored in the zeolite host, have been prepared and characterized using various spectroscopic techniques, including luminescence, Raman, and FT-EXAFS, along with theoretical calculations. Analyses indicate the formation of metal ion oligomers. Th…
Novel spinel heteroepitaxial structures composed of ferrimagnetic spinel CoFe2O4 (CFO) and ultrathin γ-Al2O3 buffer layers are integrated on Si(111). Flat (111)-oriented epitaxial CFO films with only two in-plane domains induced by γ-Al2O3 are ferromagnetic at room temperature with high saturation magnetization. These…
We report the experimental realization of an optical metamaterial composed of a hexagonal array of coaxial plasmonic metal/insulator/metal waveguides that shows strong polarization-independent optical mode index dispersion in the ultraviolet/blue. The metamaterial is composed of silicon coaxes with a well-defined diam…
While silicon nanostructures are extensively used in electronics, the indirect bandgap of silicon poses challenges for optoelectronic applications like photovoltaics and light emitting diodes (LEDs). Here, we show that size-dependent pseudo-direct bandgap transitions in silicon nanocrystals dominate the interactions b…
PLA-knitted fabric was scoured in the presence of sodium carbonate and a non-ionic detergent through an exhaust technique. The scoured fabric was washed in the presence of three tailor-made formulations. Formulation I comprised of non-ionic detergent, formulation II comprised of detergent, sodium perborate and tetra-a…
The persistent photoconductivity (PPC) effect in nanotube arrays of barium titanate and TiO2 (BTO/TiO2NT) was studied at room temperature under daylight illumination. The BTO/TiO2NT heterostructures exhibited a giant PPC effect that was six orders of magnitude higher than the dark conductivity, followed by a slow rela…
Metal-Ferroelectric-Insulator-Semiconductor (MFIS) structure with 20 nm thin lead zirconate titanate (PZT) ferroelectric film and 6 nm ultrathin high-κ titanium oxynitride (TiOxNy) insulator layer on p-Si substrate were fabricated. Effect of constant voltage stress (CVS) on electrical characteristics of MFIS structure…
We propose a post-processing approach to efficiently tune the resonance frequency in double-layered terahertz metamaterials separated by a bonding agent. By heating the bonding agent, it is possible to move one metamaterial layer laterally with respect to the other. This changes the coupling between adjacent layers, t…
Cubic ZnSe nanowires with a polymer-like entangling structure and their application in polymer light-emitting diodes (LEDs) are reported in this paper. The entangling nanostructure of ZnSe, which is observed for the first time, is grown on the basis of the oriented attachment mechanism but does not occur completely un…
We studied the UV-irradiation and phospholipid driven bipolar-radial structural transitions within azoxybenzene nematic liquid crystal (LC) droplets dispersed in water. It was found that the UV-irradiation induced trans-cis isomerisation of LC molecules could enable structural transitions into radial-type configuratio…
A selenolate-protected Ag-Pd alloy cluster was synthesized using a one-pot solution-phase route. The crude product upon chromatographic analyses under optimized conditions gave three distinct clusters with unique optical features. One of these exhibits a molecular peak centered at m/z 2839, in its negative ion mass sp…
The nonlinear analysis of shape memory alloy (SMA) hybrid composite beams under in-plane thermal load is presented in this paper. The properties of the constituents are assumed to be temperature dependent. The initial imperfection of the beam is also taken into account as an initial deflection function prior to heatin…
Clay and its recrystallized zeolitic derivatives were used in this study as templating agents for carbon nanostructured materials. The conventional nanocasting process that involves impregnation with furfural alcohol and subsequent chemical vapour deposition was followed. Several techniques such as X-ray diffraction (…
The structures of three adventitiously obtained peroxolanthanoid complexes have been determined, namely, [Yb2(Cp)4(µ-O)2/3(µ-O2)1/3(thf)2] (1) (Cp = cyclopentadienyl; thf = tetrahydrofuran), which has disorder between the bridging oxide and peroxide, [Nd2(o-PhPhForm)4(thf)4(µ-O2)] (2) (o-PhPhForm = N,N'-bis(2-phenylph…
The hierarchical porous Li₂Mg(NH)₂@C nanowires full of micropores, mesopores, and macropores are successfully fabricated via a single-nozzle electrospinning technique combined with in-situ reaction between the precursors, i.e., MgCl₂ and LiN₃, under physical restriction upon thermal annealing. The explosive decomposit…
The self-assembly of binary mixtures of architecturally and compositionally diverse surfactant-like polystyrene–poly(2-vinylpyridine) (PS–PVP) block copolymers (BCPs) in solution and in thin films has been systematically studied. PS–PVP BCPs of different molecular architecture synthesized by living anionic polymerizat…
The influence of grain size in the magnetic properties of phase separated manganites is an important issue evidenced more than a decade ago. The formation of long range ordered phases is suppressed as the grain size decreases giving place to a metastable state instead of the ground state. In this work, we present a st…
ABSTRACT An investigation into the mechanism by which ethylene thiourea (ETU) cross-links polychloroprene (CR) in combination with zinc oxide (ZnO) was undertaken. This was achieved through an examination of the mechanisms of cross-linking CR with ETU and ZnO separately and in unison. Spectroscopic and physical charac…
The thermal conductivity of vertically aligned carbon nanotube arrays (VACNTAs) grown on silicon dioxide substrates via chemical vapor deposition is measured using a 3ω technique. For each sample, the VACNTA layer and substrate are pressed to a heating line at varying pressures to extract the sample's thermophysical p…