Viscoelastic properties of oxide-coated liquid metals
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Wearable electronics self-powered by using human body heat: The state of the art and the perspective
In this paper, we present our vision of what kind of wearable devices and how they can be powered by the heat of human beings and by using ambient light. The basic principles of designing body-powered devices and ways of their hybridizing with photovoltaic cells are discussed. The mechanisms of thermoregulation in hum…
Material parameters of metamaterials (a Review)
A theory of the homogenization of a certain class of metamaterials is stated. These metamaterials are volume lattices of electric and magnetic dipoles that are resonant with frequencies that are considerably lower than that of the first Bragg resonance of the lattice. It was shown that, for plates of a metamaterial, w…
Microbe-clay mineral interactions
Clays and clay minerals are common components in soils, sediments, and sedimentary rocks, and they play an important role in many environmental processes. Iron is ubiquitous in clays and clay minerals and its oxidation state, in part, controls the physical and chemical properties of these fine-grained minerals. The st…
Selective cytotoxic effect of ZnO nanoparticles on glioma cells
In this study we examined the cytotoxic effect of ZnO nanoparticles on various human cancer and normal cells. We found that the ZnO nanoparticles exerted a cytotoxic effect on the human glioma cell lines A172, U87, LNZ308, LN18, and LN229, whereas no cytotoxic effect was observed on normal human astrocytes. Similarly,…
Preparation of silver nanoparticles with controlled particle size
Silver colloids show different colors due to light absorption and scattering in the visible region based on plasmon resonance. The resonance wavelength depends on particle size and shape. Here we report chemical reduction methods for preparation of silver nanoparticles exhibiting multicolor in aqueous solutions. Depen…
Mixed-valence manganites
Mixed-valence manganese oxides (R1-χAχ)MnO3 (R=rare-earth cation, A=alkali or alkaline earth cation), with a structure similar to that of perovskite CaTiO3, exhibit a rich variety of crystallographic, electronic and magnetic phases. Historically they led to the formulation of new physical concepts such as double excha…
Structural materials for fission & fusion energy
Structural materials represent the key for containment of nuclear fuel and fission products as well as reliable and thermodynamically efficient production of electrical energy from nuclear reactors. Similarly, high-performance structural materials will be critical for the future success of proposed fusion energy react…
Characterization of a Crystallized ZnO/CuSn/ZnO Multilayer Film Deposited with Low Temperature Magnetron Sputtering
The ZnO/CuSn/ZnO (ZCSZ) multilayer films were deposited on polycarbonate substrates using reactive RF and DC magnetron sputtering. The thickness of each layer was 50 nm/5 nm/45 nm, respectively. The ZCSZ films showed a sheet resistance of <TEX>$44{\Omega}$</TEX>/Sq, which was an order of magnitude lower than that indi…
“Click” Chemistry for Facile Immobilization of Iron Phthalocyanines onto Electrospun Nanofiber Surface
Abstract We have developed a facile and efficient methodology to prepare iron phthalocyanine-coated nanofibers by combining electrospinning and Cu(I)-catalyzed 1,3-dipolar Huisgen cycloaddition of azides and alkynes.
Resonant normal form for even periodic FPU chains
We investigate periodic FPU chains with an even number of particles. We show that near the equilibrium point, any such chain admits a resonant Birkhoff normal form of order four which is completely integrable —an important fact which helps explain the numerical experiments of Fermi, Pasta, and Ulam. We analyze the mom…
Highly amphiphilic manganese porphyrin for the mitochondrial targeting antioxidant
Here, we communicate that the design of the anti-oxidant consisting of amphiphilic manganese porphyrin with one dimethylimidazolium group and three phenyl groups for mitochondrion targeting. The resulting Mn-porphyrin MnMImP(3)P exhibited high partition coefficient (logP(ow) = +4.78) as well as significant superoxide…
Investigation of photon attenuation coefficient for pumice
With the rapid development in technology, the radiation protection has become one of the most important part of building construction. As shielding is the basic method for radiation protection, besides the physical and mechanical properties of materials used in building construction, the radiation shielding properties…
Effect of Alignment Layer on Electro-Optic Properties of Polymer-Dispersed Liquid Crystal Displays
The electro-optic properties of polymer-dispersed liquid crystal (PDLC) cell having parallel alignment layers were examined and compared to the control cell without any pre-treatment. Although the liquid crystal droplets of the treated PDLC was observed to be much smaller than that of the control cell, the contrast ra…
Fabrication of Au Fine Structures of Nanoparticles by Anodization of Purple Gold (AuAl2)
Abstract The anodization of purple gold (AuAl2) in oxalic acid at low voltage (5 V) generated uniformly sized Au nanoparticles on the substrate. The surface of the sample showed a characteristic color after the anodization, which originated from the localized surface plasmon (LSP) of Au nanoparticles. The samples with…
Photoluminescence Characteristic of Ce3+-Eu3+Co-doped Y3Al5O12Phosphor Prepared by Combustion Method
For this study, Yttrium aluminum garnet (YAG) particles co-doped with Eu3+ and Ce3+ were prepared by combustion process using the 1:1 ratio of metal ions as reagents. The characteristics of the synthesized nano powder were investigated by means of X-ray diffraction (XRD), Scanning Electron Microscope (SEM), and photol…
Comparative performance of diatom indices in aquatic pollution assessment.
The use of epilithic diatoms as indicators of river water quality was evaluated in two streams of south Turkey. Diatoms as well as physical and chemical variables were sampled monthly between May, 2002 and April 2003 at six sites that can represent the streams. A total of 110 diatom taxa belonging to 32 genera were fo…
Nanomedicine: reshaping clinical practice
“… for I was never so small as this before, never!” Lewis Carroll, Alice’s Adventures in Wonderland (1865) The 6th Key Symposium on Nanomedicine was held in Stockholm, Sweden on September 9–11, 2009. The symposium featured presentations from numerous leading scientists in the field and was divided into four sessions,…
Visible-light Energy Storage by Ti3+ in TiO2/Cu2O Bilayer Film
Abstract Ti3+ in TiO2/Cu2O bilayer film is demonstrated to show energy storage ability. UV–vis absorption spectrum and XPS characterization are carried out to confirm that there are Ti3+ ions formed and that more than 74% Ti4+ ions are reduced to Ti3+ ions after visible-light irradiation. More than 10−2 C cm−2 electro…
Research on phase transformations in 3d-metal oxides at high and ultrahigh pressure: state of the art
In magnetic systems with strong electron correlations, the theory predicts the existence of a pressure-induced insulator?metal phase transition accompanied by a collapse of the localized magnetic moment and by a structural phase transition. However, the values of the pressures at which these effects should be observed…