Materials Literature
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Abstract The synthesis, structure and magnetic properties of the first thiooxoverdazyl metal complex [Cu(hfac) 2 (Svdpy)] [hfac = (1,1,1,5,5,5)‐hexafluoroacetylacetonate; Svdpy = 1,5‐dimethyl‐3‐(2‐pyridyl)‐6‐thiooxoverdazyl] is described. The organic radical acts as a bidentate ligand leading to a six‐coordinate metal…
Zugangsbeschränkung: Die epitaktische Abscheidung von Ag auf Ag-Nanoplättchen konnte durch den Zusatz von Natriumcitrat oder Poly(vinylpyrrolidon) (PVP) in seitliche bzw. senkrechte Richtung gelenkt werden (siehe Bild), sodass Kantenlänge und Dicke der Ag-Nanoplättchen um das 100- bzw. 40-Fache zunahmen. Raman-Streusi…
ZnO nanowires were synthesized on Si substrates by a simple metal vapor deposition method without any catalysts. The initial growth and the growth mechanism of the ZnO nanowires were studied using scanning and transmission electron microscopy. We found that the ZnO nanowires grew on the Si substrate via a self-seeding…
Dielectric and piezoelectric properties of lead-free (1-x)(Bi0.5K0.5)TiO3-xBiFeO3 ceramics prepared by a conventional solid-state reaction method were studied in the range of x = 0∼40 mol%. A tetragonal perovskite structure was maintained at x = 0∼10 mol% forming a solid solution between (Bi0.5K0.5)TiO3 and BiFeO3 wit…
The structural and surface changes in a phenylene-bridged periodic mesoporous organosilica after thermal treatment under different conditions are reported. Organic moieties in the pore walls are stable at temperatures close to 500 °C but calcination in the presence of oxygen leads to C–Si bond cleavage as well as the…
Thermal cross-linking is widely used to impart stability or improved mechanical properties to layer-by-layer (LbL) assemblies. However, the kinetics of thermal cross-linking within LbL films is not well understood. Furthermore, because LbL films are generally ultrathin (<100 nm), the influence of confinement on cross-…
We have synthesized a series of conjugated polymers, including poly[(2,7-(9,9-dioctylfluorene)-alt-2,7-(9,9-didodecylfluorene)] (PF), poly[(2,7-(9,9-dioctylfluorene)-alt-2,5-(3-dodecylthiophene)] (PFT), and poly(3-dodecylthiophene) (PT). Non-covalent functionalization of single walled carbon nanotubes (SWNTs) with the…
The present paper highlights results of a systematic study of photoinduced electron transfer, where the fundamental aspects of the photochemistry occurring in solutions and in artificially or self-assembled molecular systems are combined and compared. In photochemical electron transfer (ET) reactions in solutions the…
Concrete has long been used as a shield against high-energy photons and neutrons. In this study, colemanite and galena minerals (CoGa) were used for the production of an economical high-performance heavy concrete. To measure the gamma radiation attenuation of the CoGa concrete samples, they were exposed to a narrow be…
Highly oriented, single-crystal Ni nanowire arrays have been synthesized atop amorphous SiO2∥Si substrates using a single-step chemical vapor deposition method in the absence of any foreign catalyst. Electron and X-ray diffraction confirm the crystalline quality of the Ni nanowires while magnetoresistance measurements…
We investigate the coupling between bright and quasi-dark eigenmodes in a planar metamaterial supporting highly dispersive transparency. The specific design of such a metamaterial consists of a cut wire (CW) and a single-gap split-ring resonator (SRR). Through the numerical simulation and the equivalent-circuit analys…
Lead-free piezoelectric (1-x)(Bi0.5Na0.5)TiO3–xBiAlO3 (BNT-BA, x = 0.00, 0.025, 0.050, 0.075, 0.100) ceramics were synthesized by a conventional solid- state reaction method. The BNT-BA ceramics exhibited enhanced ferroelectric and piezoelectric properties at x = 0.050. The x-ray diffraction analysis revealed a pure p…
Three types of multilayer films made from poly(L-lysine)/hyaluronan, chitosan/hyaluronan, and poly(allylamine hydrochloride)/poly(L-glutamic acid), were used to investigate the interplay between film mechano-chemical properties and cell adhesion. We showed that C2C12 myoblast adhesion and proliferation depended on the…
A magnetic, luminescent Eu-doped Mg-Al layered double hydroxide with ibuprofen (IBU) intercalated in the gallery has been successfully prepared by a simple coprecipitation method. The physicochemical properties of the samples were well characterized by powder XRD, TEM, FTIR, TGA, inductively coupled plasma MS (ICP-MS)…
We present a sequential molecular dynamics/quantum mechanics (MD/QM) study and steady-state spectroscopy measurements of the nanostar dendrimer (a phenylene−ethynylene dendrimer attached to a ethynylperylene chromophore) to determine the temperature dependence of the electronic absorption process. We studied the nanos…
The selective catalytic reduction (SCR) of NO by NH(3) over V(2)O(5)-based catalysts is used worldwide to control NO(x) emission. Understanding the mechanisms involved is vital for the rational design of more effective catalysts. Here, we have performed a systematic density functional theory (DFT) study of a SCR react…
Octreotide is believed to be the ligand of somatostatin receptors (SSTRs) which are widely used in tumor diagnosis and clinical therapy. In the present work, a new targeting conjugate, octreotide-polyethylene glycol-phosphatidylethanolamine (Oct-PEG-PE), was developed for the assembling of liposome, and the effect of…
Synthesis, crystal structures, and magnetic properties of melilite-type oxides A(2)MSi(2)O(7) (A = Sr, Eu; M = Mg, Mn) were investigated. These compounds crystallize in the melilite structure with space group P4̅2(1)m. The (151)Eu Mössbauer measurements show that the Eu ions are in the divalent state. The Eu(2)MgSi(2)…
Because of the large reactivity of single layer graphene to electron-transfer chemistries, 4-nitrobenzene diazonium tetrafluoroborate is employed to modify the electrical properties of graphene field-effect transistors. After modification, the transfer characteristics of chemically modified graphene show a reduction i…
Abstract Tannins and pH are often cited as factors that affect the corrosiveness of wood yet there are few data to confirm these statements. The purpose of this paper is to systematically investigate the effect of tannins and pH on corrosion of metals in wood. Four wood species known to vary in both their pH and extra…