Materials Literature
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Simple organic salts based on aniline-derived cations and D-tartrate anions formed organogels and helical nanofibers. The organic salt (p-fluoroanilinium)(D-tartrate) was found to generate an organogel despite the absence of a hydrophobic alkyl chain, whereas (p-iodoanilinium)(D-tartrate) formed helical nanofibers in…
We report on the formation and structure development of polyelectrolyte–surfactant complexes, PE–S, of double hydrophilic block copolymers poly(sodium 2-sulfamate-3-carboxylate isoprene)- block -poly(ethylene oxide), PSCI–PEO, and cationic fluorosurfactant, N -(3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-heptadecafluorodecyl…
Objectives : Biosynthesis of silver nanoparticles has received much attention in recent years due to their numerous advantages over physical and chemical synthesis like being eco friendly, free from hazardous chemicals etc. Large number of biological agents are used for the biosynthesis of metal nanoparticles includin…
(Bi1–xLaxFeO3)0.5(PbTiO3)0.5 solid solution obtained by mechanochemical synthesis was characterized by X-ray diffraction (XRD), atomic force microscopy and Fourier transform near-infrared Raman spectroscopy. The single-phase solid solution with La content between x = 0 and 0.5 was prepared. The solid solution exhibits…
A novel method for fabricating anisotropic collagen membranes, which regulate the preferred orientation, is developed. The high-accuracy universal polarimeter (HAUP) method is used for simultaneous and quantitative evaluations of the optical anisotropy and optical activity. The evaluation of these optical quantities,…
The combination of external potential dynamics and Brownian dynamics is introduced to study the kinetics of orientational ordering in block copolymer/superparamagnetic nanoparticle composites where the particles are smaller than the domain spacing and preferentially segregate into one block of the copolymer. This simu…
This article provides an overview of the recent developments in the study of plasmonics using metal nanoparticles. The nanoparticles used for plasmonics applications are produced with microfluidics reactor as a high yield synthesis method. Microfluidics system shows a great promise in controlling the size, shape and s…
Ba${}_{2}$Ti${}_{2}$Fe${}_{2}$As${}_{4}$O is a newly discovered superconductor with a crystal structure that could be viewed as an intergrowth of BaFe${}_{2}$As${}_{2}$ and BaTi${}_{2}$As${}_{2}$O. Although neither BaFe${}_{2}$As${}_{2}$ nor BaTi${}_{2}$As${}_{2}$O is superconducting, the combined structure exhibits s…
In this work, the electrical conductivities of sputtered 6 nm and 50 nm thick, dense yttria stabilized zirconia (YSZ) thin films are measured using impedance spectroscopy in both dry and humidified air at the intermediate temperatures of 300–650 °C. While the 50 nm thick films exhibited the same conductivity in both d…
We report first-principles study of structural, electronic, vibrational, dielectric, and elastic properties of Ba2YTaO6, a pinning material in high temperature superconductors (HTS), by using density functional theory. By using different exchange-correlation potentials, the accuracy of the calculated lattice constants…
In the present paper, the stability of a nonlinear elastic cylindrical tube made of micropolar material is analyzed. It is assumed that the elastic properties of the tube vary through the wall thickness. The problem is studied for the case of axial compression of the tube under internal and external hydrostatic pressu…
The standard gradient models, originally introduced in the works of Gurtin ( Physica D 1996; 92: 178) and Frémond and Nedjar ( Int J Solids Struct 1996; 33: 1083) have been studied intensively in the last few decades for various applications in plasticity, damage mechanics and multi-phase analysis. In this paper, thes…
A stable super-hydrophobic and self-cleaning surface with a high contact angle above 150° and the contact angle hysteresis below 3° were produced by using roughness combined with hydrophobic coatings, which were also confirmed to exhibit extreme water repellence and self-cleaning properties which facilitate removal of…
A novel dicyanofulvene dimer fused to a benzene ring (3a) has been synthesized as an electron-accepting molecule. The low-lying LUMO level was validated by measuring the ultraviolet photoelectron spectroscopy and electronic spectra. Cyclic voltammetry exhibited sequential reversible waves from 3a to 3a(4-) in a range…
Three groups of polypyrrole (PPy) were synthesised at different mole ratio of FeCl3 to pyrrole of 0·5∶1, 0·75∶1 and 1∶1, and were marked as N-PPy, H-PPy and M-PPy respectively. The effects of oxidant dosage on morphologies, chemical structures, conductivities and especially dielectric properties were contrastively stu…
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…