Materials Literature
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The DC conductivity and dielectric properties of glassy Se100–xZnx 2 ≤ x ≤ 20 alloys have been investigated in the temperature range 303 - 487 K with frequency range 100 Hz – 1 MHz. It is observed that DC conductivity decreases and the activation energy increases with Zn content in Se-Zn system. Dielectric dispersion…
Two isomorphous Mn(II) and Co(II) coordination polymers with an azide and zwitterionic dicarboxylate ligand as coligands were synthesized and structurally characterized, and their magnetic properties were studied. They are formulated as [M3(L)2(N3)6(H2O)2]·2H2O (M = Mn (1), Co (2), L = 1,2-bis(4-carboxylatopyridinium-…
Synthesis of nanocrystalline hexaaluminate is reported using an original activated reactive synthesis process. Starting from a classical ceramic solid, exhibiting low surface area and a micrometric crystal size, a two-step grinding process allows reduction of the crystal size down to a few nanometers and development o…
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 Johannes Roth, Steffen Sonntag, Johannes Karlin, Carolina Trichet Paredes, Marc Sartison, Armin K…
SrAl2O4: Eu was synthesized by combustion method. Mechanoluminescence (ML) and Photoluminescence (PL) were studied. Time vs ML intensity plot shows two peaks. ML intensity increases with load applied and it is regained by UV irradiation. Photoluminescence shows intense emission in green region. PACS: 78.60.Mq; 78.55.Hx
We determined the catalytic function of chemically modified fly ash (MFA) for the growth of carbon nanotube (CNT) ropes with ~54% yield by the pyrolysis of the composite film of poly (vinyl alcohol) (PVA) at 500°C for 10 min under 2 L/min flow of nitrogen. Fly ash was treated with 2M sodium hydroxide to have MFA and u…
Abstract The shape of a solidifying interface is generally affected when it encounters foreign inert particles. The degree of deformation depends on the morphology and physical properties of the particles, the melt, the solid and the external fields, affecting the pushing and capture process of the particles. The part…
Solvothermal reactions of elements Ge and Se with Ln(2)O(3) in a pentadentate polyamine, tetraethylenepentamine (tepa), produced novel neutral lanthanide-selenidogermanate polymers [{Ln(tepa)(μ-OH)}(2)(μ-Ge(2)Se(8))](n) (Ln = Eu 1, Gd 2, Dy 3). The reaction with Dy(2)O(3) in ethylenediamine (en) afforded an ionic sele…
Sub-micron Fe2O3 encapsuled carbon spheres core-shell composite (Fe2O3/C) has been successfully prepared through one-pot solvothermal reaction of acetylacetone and FeCl3 at 500°C. The phase and morphology of the sample were examined by XRD, TEM, SEM, HRTEM, XPS and TGA. Meanwhile, magnetic property of the sample was m…
Superthin polyvinil alcohol graphene sheet of several nanometers in thickness is obtained by the electrospinning. Polyvinil alcohol (10 wt.%) solution with the additive of ash (0.5 wt.%) is used for this purpose
Self-assembly owing to noncovalent interactions provides a powerful tool for the creation of structures at a molecular level. Metal-connected diblock polymers offer a versatile building block for a large variety of nanostructures. Here, we report the supramolecular self-assembly of bis(2,2′:6′,2′′-terpyridine) metal-c…
The dual cell concept is a novel design for solid oxide fuel cells operating at intermediate temperature. The cell comprises a series of five layers with different compositions, alternating two dense electrolytes and three porous layers, i.e. the outer electrodes and a central membrane. The dual cell concept makes it…
Single crystals of a new phosphate AgCr2(PO4)(P2O7) have been prepared by the flux method and its structural and the infrared spectrum have been investigated. This compound crystallizes in the monoclinic system with the space group C2/c and the parameters are, a = 11.493 (3) Å, b = 8.486 (3) Å, c = 8.791 (2) Å, β = 11…
The electromagnetic and microwave-absorbing properties of irregular-shaped MnO2 nanoparticles (NP) and MnO2 nanorods (NR) as dielectric absorbent fillers in an insulating epoxy resin were investigated by the transmission/reflection method at 2−18 GHz. The real part of complex permittivity ϵ′ for 60 wt% of MnO2 NP-epox…
In this paper, we report the fabrication, characterization and ex vivo bio-distribution of Rhodamine B-labeled shell cross-linked magnetic micelles (RhB-SCL-MMs) as a T2-weighted magnetic resonance contrast agent. Three sizes of hybrid micelles (80, 130 and 180 nm) are synthesized and the size effects on the cytotoxic…
Experimental investigations have been carried out for determining the thermal conductivity of nanofluids with nanoparticles (α- and γ-Al2O3, and AlN) dispersed in an engine oil as the base fluid (up to 3 wt.%). Hot-wire conductivity measurements performed at 300.15 K reveal an increasing tendency with increasing conce…
Hollow CdS nanoclusters were predicted to trap alkali metals and halogen atoms inside their cavity. Furthermore, electron affinities (EA) of endohedrally halogen doped clusters and ionization potentials (IE) of endohedrally alkali doped clusters were predicted to be very similar. This makes them suitable to build clus…
Nano-structures of nickel (Ni) and nickel subsulfide (Ni(3)S(2)) materials were studied and mapped in 3D with high-resolution x-ray nanotomography combined with full field XANES spectroscopy. This method for characterizing these phases in complex microstructures is an important new analytical imaging technique, applic…
A gable-type zinc phthalocyanine and a derived planar bis-phthalocyanine containing a shared anthracene unit have been synthesized and their spectroscopic properties examined. The former showed a split Q band, while the latter exhibited a red-shifted but unsplit Q band, as explained by exciton coupling theory and mole…
Block copolymers feature unique properties for organizing in a well-defined pattern on length scales of several tenths of nanometers. This special attribute enables the formation of ideal donor and acceptor domains for photovoltaic devices in the size of the exciton diffusion length. Thus we designed an amphiphilic bl…