Materials Literature
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We demonstrate a solvent-free contact printing process for deposition of patterned and unpatterned colloidal quantum dot (QD) thin films as the electroluminescent layers within hybrid organic-QD light-emitting devices (QD-LEDs). Our method benefits from the simplicity, low cost, and high throughput of solution-process…
Surface-enhanced Raman scattering from molecules adsorbed on TiO 2 nanoparticles has been observed. This is attributed to the dominant contribution of the TiO 2 -to-molecule charge-transfer mechanism. The charge-transfer process is largely dependent on the intrinsic nature of the adsorbed molecules and the surface pro…
We report the chemical reaction of single-layer graphene with hydrogen atoms, generated in situ by electron-induced dissociation of hydrogen silsesquioxane (HSQ). Hydrogenation, forming sp3 C--H functionality on the basal plane of graphene, proceeds at a higher rate for single than for double layers, demonstrating the…
New assembly techniques are required for creating advanced materials with enough structural flexibility to be tuned for specific applications, and to be practical, the techniques must be implemented at relatively low cost. Layer-by-layer (LBL) assembly is a simple, versatile, and significantly inexpensive approach by…
The cellular uptake of nanoparticles by living cells is predicted to be strongly size-dependent, according the thermodynamic analysis, and an optimal particle radius of ∼ 25–30 nm at which the cellular uptake reaches a maximum of several thousand is shown to exist. The theoretical prediction provides valuable guidance…
Proton conducting electrolyte materials are promising candidates for the development of low temperature solid oxide fuel cells. Among them, various doped barium cerate compounds, such as BaCe1-xYxO3-δ, have been intensively investigated because of their high proton conductivity. As a drawback, cerates are chemically u…
Spherical hybrid 149 ± 44 nm-sized silica-carbazole (Cbz) nanoparticles (H-SiO2-g-Cbz2% NPs) were prepared using the basic hydrolysis of tetraethoxysilane (TEOS) and of a bifunctional N-carbazolyl-(3-(triethoxysilyl)propyl)butanamide silane in W/O micro-emulsion conditions. In a 2nd step, surface-localized heterocycli…
The operation of solid oxide fuel cells (SOFC) was evaluated on simulated coal gas in the presence of several coal gas impurities that are expected to remain in low concentration after warm gas cleanup. Phosphorus, arsenic and sulfur were considered in this study. The presence of phosphorus and arsenic in low, 1-2 ppm…
High dislocation density in zirconia systems may significantly affect oxygen ion conductivity. Several processes for introduction of high dislocation density were investigated including ion irradiation. YSZ single crystals were irradiated with Ar+ ions and dislocations were observed by TEM. After heat treatment, high…
The rusts on the gauge face and non-gauge face of two rail steels (traditional C–Mn and novel Cu–Mo rail steel) were characterised after two years of service to corelate with an apparent visual observation of a lower corrosion rate in the case of the Cu–Mo rails. Rust samples were characterised by X-ray diffraction, F…
The dispersion of single-walled carbon nanotubes in silicon nitride ceramic matrices has been investigated by small angle neutron scattering experiments. In contrast to electron microscopy investigations of fracture surfaces, neutron scattering measurements provide information on the bulk dispersion of nanotubes withi…
Ribbons of ferromagnetic shape memory Ni2+xFe1−xGa (x=0 and 0.12) alloys were prepared at wheel speeds of 12 and 35m∕s by melt spinning technique. The structural (site) disorder and the associated changes in the magnetic properties of the ribbons were investigated by Fe57 Mössbauer spectroscopy and magnetization measu…
The hyperthermophilic archaeon Sulfolobus solfataricus grows optimally above 353 K and utilizes an unusual promiscuous nonphosphorylative Entner-Doudoroff pathway to metabolize both glucose and galactose. It has been proposed that a part-phosphorylative Entner-Doudoroff pathway occurs in parallel in S. solfataricus, i…
Abstract [Yb(OAr) 2 (μ‐OMe)(DME)] 2 ( 1 ) (OAr = 2,6‐di‐ iso ‐propylphenolate) was synthesised via a redox transmetallation ligand exchange reaction between ytterbium metal, diphenylmercury and 2,6‐di‐ iso propylphenol in DME. The source of the methoxy groups is from cleavage of DME, and the C‐O bond activation is une…
A novel mixed phase Ru-WCN film grown by plasma enhanced atomic layer deposition (PEALD) has been investigated as a novel direct plate liner for advanced copper metallization. Ru/WCN films have been grown using a nanolaminate approach. Preliminary results show that composition and thickness of the film both contribute…
The spectroscopic properties and the photodynamic activity of a highly water soluble zinc(II)tetramethyltetrapyridino[2,3-b:2',3'-g:2",3"-l:2"',3'''-q]porphyrazinium salt (ZnTM2,3PyPz) were investigated in aqueous homogeneous solution and in biomimetic reverse micelles medium bearing photooxidizable biological substra…
Abstract A novel coordination compound [Zn(DAT) 2 (H 2 O) 4 ](PA) 2 ⋅2H 2 O has been synthesized using 1,5‐diaminotetrazole (DAT) as ligands. It crystallizes in the monoclinic space group C 2/ c , with a =1.51973(19) nm, b =0.67904(9) nm, c =3.0712(4) nm, β =90.507(2)°, V =3.1692(7) nm 3 , Z =4, and μ =0.888 mm −1 . W…
Using XRD, impedance spectroscopy, and XPS, it was shown that both Bi 2 Ru 2 O 7 and Pb 2 Ru 2 O 6.5, generally announced as attractive electrode materials for IT-SOFCs, chemically react with CGO. In addition, a never-mentioned time-instability under electrochemical measurements with YZS as electrolyte mediates the po…
Uniform silica beads modified with a positively charged tin porphyrin (SnT(NMe4Py)P) adsorbed onto their surface are used as photocatalytically active templates to synthesize platinum and palladium shell and core−shell nanostructures. The cationic porphyrin SnT(NMe4Py)P serves a dual function, acting as both a photoca…
The phase transitions occurring in the syndiotactic polystyrene−norbornadiene complex were investigated by simultaneous measurements of wide-angle X-ray diffraction (WAXD) and differential scanning calorimetry (DSC). To understand the effect of norbornadiene molecules on the phase-transition behavior, the δ form sampl…