Materials Literature
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A preparation process for ZnO nanorods (or nanowires) by use of electrochemical deposition in an aqueous solution of zinc nitrate and nitric acid at temperatures 75°C was established. The surface morphologies of ZnO nanostructures can be adjusted with constant high internal quantum efficiency (IQE). The as-grown ZnO n…
Abstract We investigate the effect of surface topology of a block copolymer/neutral surface/SiO 2 trilayered gate insulator on the properties of pentacene organic thin film transistor (OTFT) by the controlled etching of self assembled poly(styrene‐ b ‐methyl methacrylate) (PS‐ b ‐PMMA) block copolymer. The rms roughne…
The left-handed properties of metamaterials with saturable nonlinearity are analyzed with respect to their electromagnetic response as a function of externally varying parameters. We demonstrate that the response of the medium is strongly affected by the saturation of the nonlinear effects. The last can be exploited t…
Abstract Plasticized starch/clay composite films were prepared by casting aqueous solutions containing oxidized corn starch, different concentrations of glycerol as a plasticizer and 5% clay (sodium montmorillonite, Na + ‐MMT) on the basis of dry starch. The water‐binding properties of the composite films were evaluat…
From phase field simulations, we investigate the size-dependent polarization distribution in ferroelectric nanostructures embedded in a nonferroelectric medium. The simulation results exhibit that vortex structures of polarizations and single-domain structures are formed in ferroelectric nanodots and nanowires, respec…
The widely accepted expression for conductance in polycrystalline metal oxides cannot take into account of the observed decrease in conductance of nanostructured materials with respect to their larger counterpart. We provide here an explanation for this phenomenon suggesting that tunneling through the Schottky barrier…
Synthesis of the precursors, using research grade materials and locally available facilities, is optimized in order to obtain a suitable sol for BaTiO 3 . The optimally synthesized BaTiO 3 sol is then spun onto Cu substrates to obtain films of thickness ~0.5 μm. The deposited BaTiO 3 films are heated up to a temperatu…
The device characteristics of field-effect transistors featuring a random network of carbon nanotubes (CNTs) as a channel material were investigated by means of a numerical simulation. The simulations of the conductivity of CNTs, contact resistances, and metallic to semiconducting ratio indicated that, even with a ran…
This paper deals with a study about the position of the flat-band potential and the surface chemistry of boron-doped diamond electrodes. Successive and mild anodic treatments have been performed on as-deposited electrodes, in H 2 SO 4 . From Mott–Schottky plots, flat-band potential ( V FB ) evolution has been monitore…
We report the effect of pressure on the surface morphology, electrical and optical properties of phosphorus (P)-doped p-type ZnO grown by radio frequency magnetron sputtering. The nanorod structures of P-doped ZnO films became dense and flat with decreasing pressure. The Hall effect measurement of the films grown at a…
status: Published
Nickel single crystals with different crystallographic orientations were deformed by high-pressure torsion. Special attention is devoted to examining the evolution of the micro-texture and microstructure. The initial crystal orientation was found to have a significant effect on the mechanical hardening and evolution o…
Concerted effects: Triblock peptide copolymers, organic multidentate ligands, and Zn2+ ions associate spontaneously into well-defined nanoribbons when dissolved at proper ratios in water at moderate pH values. These nanofibers are stabilized by an extraordinary concerted effect of distinct noncovalent interactions: me…
Single-crystal thin films of SrFeO2, which is an oxygen-deficient perovskite with “infinite layers” of Fe2+O2, were prepared by using CaH2 for low-temperature reduction of epitaxial SrFeO2.5 single-crystal films deposited on KTaO3 substrates. This reduction process, removing oxygen ions from the perovskite structure f…
Glass-forming monohydroxy alcohols exhibit not only a structural relaxation but also a slower, single-exponential Debye-type relaxation process which already freezes in the liquid phase. By using dielectric spectroscopy, we study how these relaxations evolve when the aprotic alkyl halide n-bromobutane is added to n-bu…
A series of Ni50−xMn37In13Cox (x=0–9) ribbons was synthesized using the melt-spinning technique. Different ordered structures (5M, 7M, B2, and L21) were formed depending on composition. Both martensitic transformation temperature and entropy change increase with increasing Co for 0⩽x⩽3, while they decrease with furthe…
Chemical deposition methods like MOD and MOCVD are promising approaches for coated conductors (CCs) due to their reduced cost and easy scaling. High quality La 2 Zr 2 O 7 (LZO) buffer layers were prepared by MOD on Ni–5 at.% W (NiW) RABiTS and subsequent YBCO layers (450–800 nm thick) were deposited by pulsed injectio…
Abstract Banana fiber, one of the world's most important natural fiber obtained from the bast of the plant Musa Saptentum Linn, is available in plenty in Kerala. Without reinforcement, polyester resins are hard and brittle and cannot be used for structural applications. In the present study, short banana fiber‐reinfor…
Hypoxis hemerocallidea Fisch. & C.A. Mey (Hypoxidaceae) is an important plant species in traditional medicine in southern Africa. The use of the corms of hypoxis, commonly known as “African potato” is so popular that the species is threatened by over-harvesting. This study was aimed at comparing the chemical compositi…
The thermal stability of thermoelectric Zn4Sb3 has been investigated on samples produced by a new zone-melting technique, as well as by the conventional quench method. The multitemperature synchrotron powder diffraction data reveal that while conventionally synthesized, Zn4Sb3 samples have almost 40% degradation in th…