Materials Literature
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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…
In CASP5, the BioInfo.PL group has used the structure prediction Meta Server and the associated newly developed flexible meta-predictor, called 3D-Jury, as the main structure prediction tools. The most important feature of the meta-predictor is a high (86%) correlation between the reported confidence score and the qua…
The objective of this research was to investigate the effect of surface charge of poly(amidoamine), PAMAM, dendrimers on the integrity, paracellular permeability, and viability of Caco-2 cell monolayers by monitoring the transepithelial electrical resistance (TEER), mannitol permeability, and leakage of lactate dehydr…
Poly(phosphate ester)s, polyphosphonates, and polyphosphazenes are three classes of phosphorus-containing polymers that have received wide attention over the past decade for their utility in biomedicine and tissue engineering. These three families of polymers can lead to a number of subclasses of polymers with varied…
We have successfully employed laser direct write and micromachining to fabricate high capacity hydrous ruthenium oxide or microultracapacitors. A laser direct-write process is used to deposit uniform pads of in sulfuric acid under ambient temperature and atmospheric conditions. Ultraviolet laser micromachining is used…
Nanometer-sized copper metal can be formed by UV irradiation of ethanol bis(2,4-pentanedionate)copper(II) solutions: simple tuning of the irradiation conditions switches the process from homogeneous to heterogeneous nucleation, and promotes the formation of either colloidal powders or nanostructured films.
A new class of “Janus” liquid crystal compounds has been prepared with molecular weights in excess of 4000 D, but which have better temperature ranges with respect to room temperature than the revolutionary commercial material 4′-pentyl-4-cyanobiphenyl (5CB).
The synthesis and magnetic properties of a new member of the Mn12 single-molecule magnet family, [Mn12O12(O2CMe)8(O3SPh)8(H2O)4] (2), are reported. The compound was prepared by treatment of [Mn12O12(O2CMe)16(H2O)4] (1) with eight equivalents of PhSO3H in MeCN. Complex 2·4CH2Cl2 crystallizes in the triclinic space grou…
Aerosol assisted chemical vapour deposition of polyoxotungstate precursors [n-Bu4N]2[W6O19] and [n-Bu4N]4H3[PW11O39] produces films of WO(3 - x) and WO3 on glass substrates; the WO3 films show significant photocatalytic decomposition of a test organic pollutant--stearic acid--when irradiated with either 254 or 365 nm…