Materials Literature
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We describe the synthesis and photophysical properties of new Ru(II) complexes bearing different numbers of pyrenylethynylene substituents in either the 5 or 5,5′ positions of 2,2′-bipyridine. Static and dynamic absorption and luminescence measurements reveal the nature of the lowest excited states in each molecule. T…
Two parallel pathways have been identified for oxygen reduction and evolution on mixed ionic electronic conductors (MIECs). Charge transfer may proceed by reaction at the triple-phase boundary to consume or produce oxygen adsorbed on the surface of the MIEC. Alternatively, charge transfer may proceed by reaction of ox…
An unusual red-shift of phthalocyanine Q-band upon aggregation in non-aqueous media has been observed for antimony(III) derivative and has been studied by using optical absorption and magnetic circular dichroism spectroscopy.
pollo Diamond Inc. of Boston, Massachusetts, has succeeded in growing facetable, single-crystal type IIa synthetic diamonds using a patented chemical vapor deposition (CVD) technique (Linares and For characterization of this material, the company has provided a number of brown-to-gray and near-colorless gem-quality cr…
Calpha-formylglycine is the catalytic residue of sulfatases. Formylglycine is generated by posttranslational modification of a cysteine (pro- and eukaryotes) or serine (prokaryotes) located in a conserved (C/S)XPXR motif. The modifying enzymes are unknown. AtsB, an iron-sulfur protein, is strictly required for modific…
Surfaces of polytetrafluoroethylene (PTFE) were exposed to buffered aqueous solutions containing radio-labeled human fibronectin ([125I]Fn), Fn/bovine serum albumin (BSA) binary mixtures of various ratios or whole human plasma dilutions for 1 h. Total adsorbed Fn and albumin adsorption following rinsing was quantified…
In this paper, samples of (Na x K 1 m x )NbO 3 where x = 0.1 m 1 and Li y (Na 0.5 K 0.5 ) 1 m y NbO 3 where y = 0.01 m 0.05 have been prepared by conventional ceramic technique. The prepared Sodium Potassium Niobate (Na x K 1 m x NbO 3 ) and Lithium Sodium Potassium Niobate (Li y (Na 0.5 K 0.5 ) 1 m y NbO 3 ) samples…
A new method of preparing mesoporous carbons by templating mesoporous silicas is described. Two types of mesostructured silicas were used as templates, a 2-D hexagonally ordered silica (SBA-15 type) and a silica with a disordered structure (3-D). The carbon precursor was infiltrated into the pore network of the silica…
The reaction of the neutral dithiolene [Pd(Et2timdt)2] (Et2timdt = formally monoreduced diethylimidazolidine-2,4,5-trithione) with an excess of Br2 yielded few crystals of [1(Et) x 2Br](2+)(Br-)2(Br2)3 as a by-product (1(Et) = 4,5,9,10-tetrathiocino-[1,2-b:5,6-b']-1,3,6,8-tetraethyl-diimidazolyl-2,7-dithione); X-ray d…
Electron doping effects on Sr2FeMoO6 have been investigated in the title series by X-ray diffraction (XRD), neutron powder diffraction (NPD) and magnetic measurements in polycrystalline samples. XRD patterns show that the anti-site defects concentration increases with x, giving rise to highly disordered samples at the…
Acidification of K10A-α-[SiW9O34] in aqueous solution leads to the formation of α-[Si2W18O66]16−, built up from two A-α-{SiW9O34} subunits, which reacts with metal cations to form potassium and mixed potassium–transition metal complexes.
We have studied the influence of SiO 2 surface properties on the nucleation and growth of silicon quantum dots (Si-QDs) deposited by SiH 4 low-pressure chemical vapor deposition (LPCVD). First, the effect of siloxane groups (Si-O-Si) strain at the SiO 2 surface layer, characterized by Fourier transform infrared (FTIR)…
The incorporation of four Mn12 derivatives, namely [Mn12O12(O2CR)16(H2O)4] (R = CH3 (1), CH3CH2 (2), C6H5 (3), C6F5 (4)), into the hexagonal channels of the MCM-41 mesoporous silica has been studied. Only the smallest clusters 1 and 2, i.e. those with compatible size with the pores of MCM-41, could enter into the meso…
This paper reports a study of the intercalation of single bifunctional poly(ethylene oxide)- and poly(propylene oxide)-based compounds, with and without modified end groups, in Na+-montmorillonite and Na+-hectorite clays as the starting point for the design of new non-exfoliated clay–polymer materials. The terminal fu…
We report the synthesis of the complex (N,N'-tmeda)Zn(SeSiMe3)2 (1), whose pendant trimethylsilyl moieties result in a powerful reagent for the generation of ternary MM'E materials. Reaction of 1 with (PnPr3)2Cd(OAc)2 and PhSeSiMe3 has led to the formation of the ternary ZnCdSe nanocluster [(N,N-tmeda)5Zn5Cd11Se13(SeP…
The formation of BaZrO 3 from very fine (70–90 nm) ZrO 2 powders and coarser (∼1 μm) BaCO 3 powders has been studied in dry and humid air up to 1300°C using TGA/DTA, XRD, SEM, TEM, and EDS microanalysis. In the temperature range 900°–1100°C, barium is rapidly transported at the surface of the ZrO 2 particles and react…
A series of amphipathic graft copolymers composed of poly(L-lysine) (PLL) as the cationic polymer backbone and biodegradable poly(D,L-lactic-co-glycolic acid) (PLGA) as the grafting chains were synthesized and characterized. The terminal group of PLGA was activated and chemically conjugated to the primary epsilon-amin…
Formation of a highly fluorescent composite formed from the biotinylated PPE 3 and streptavidin covered polystyrene microspheres is reported.
A chiral zinc borate Zn2(OH)BO3, which exhibits nonlinear optical, photoluminescent and photoelectronic properties, has been successfully prepared through a hydrothermal reaction. The structure of the compound has a ZnO matrix and the electronic structure of the compound can be regarded as that for ZnO modified by the…
This paper explores the effect of confined dimensions and complicated geometries on the self-heating of ultra-thin body SOI and FinFET devices. A compact thermal model is introduced, incorporating the most advanced understanding of nanoscale heat conduction available. Novel device scaling is analyzed from a thermal po…