Materials Literature
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The time resolved luminescence and concentration quenching behavior were examined for Sr6BP5O20:Eu2+ phosphors. The emission spectrum of the Sr6BP5O20:Eu2+ phosphor could be deconvoluted into two well defined Gaussian peaks. This implies that the Eu2+ emission emanates from two different crystallographic sites for Sr2…
We present the electrical spin injection from room-temperature ferromagnetic (Ga, Mn)N in nitride-based spin-polarized light-emitting diodes. The electroluminescence spectra from the spin LED indicate the existence of the spin polarization via optical polarization of emitted light up to room temperature. This demonstr…
Abstract Well‐shaped single crystals of the phosphide oxides CeZnPO and PrZnPO were obtained from the rare earth metals, zinc oxide, and red phosphorous in an equimolar NaCl/KCl flux in sealed quartz ampoules. The high‐temperature (β) NdZnPO type modifications were obtained at 1170 K while the low‐temperature (α) ZrCu…
Extended abstract of a paper presented at Microscopy and Microanalysis 2006 in Chicago, Illinois, USA, July 30 – August 3, 2006
Extended abstract of a paper presented at Microscopy and Microanalysis 2006 in Chicago, Illinois, USA, July 30 – August 3, 2006
Abstract This paper presents a discontinuous Galerkin finite element computational methodology for solving the coupled phase‐field and heat diffusion equations to predict the microstructure evolution during solidification. The phase‐field modelling of microstructure formation is briefly discussed. The discontinuous Ga…
Extended abstract of a paper presented at Microscopy and Microanalysis 2006 in Chicago, Illinois, USA, July 30 – August 3, 2005
Photoluminescence spectra of electrochemically grown ZnO quantum dots doped with Na were studied at low temperature. Incorporation of Na in ZnO quantum dot is confirmed by the appearance of yellow photoluminescence at about 572nm instead of commonly observable green luminescence at about 530nm. Chemical analysis also…
The switching behaviors of dual frequency liquid crystals (DFLC) in a bistable chiral tilted-homeotropic nematic (BHN) LC cell are simulated and compared with the observed results. This cell can be switched between tilted-homeotropic state and twisted state under the applied voltage as low as 5V. The reason for the lo…
Extended abstract of a paper presented at Microscopy and Microanalysis 2006 in Chicago, Illinois, USA, July 30 – August 3, 2005
The microstructure and the magnetotransport properties of La0.5Ca0.5MnO3 films, prepared by rf magnetron sputtering on a LaAlO3 substrate, have been investigated. The electron-diffraction and the high-resolution electron-microscopy studies reveal the coexistence at room temperature of double-period modulated (charge-o…
Extended abstract of a paper presented at Microscopy and Microanalysis 2006 in Chicago, Illinois, USA, July 30 – August 3, 2005
Abstract A novel chitosan derivative, acryloyl chitosan (AcCs), and two N ‐maleoyl chitosans, MaCs‐1 and MaCs‐2, with different degrees of substitution were synthesized using completely deacetylated chitosan as raw material under different reaction conditions. AcCs is an amphiphilic chitosan derivative, but MaCs‐1 and…
In this study, the authors report atomic-resolution images that illustrate the transition from a crystalline Si3N4 grain across the interface into an amorphous Lu–Si–Mg–N–O glassy phase. The interface is not atomically abrupt, but is comprised of sub-nanometer-scale ordered regions that resemble a LuN-like structure.…
Abstract Summary: Poly(propylene glycol) oligomers with molecular weights ranging from 1 000 to 8 000 g · mol −1 were end‐functionalized with acetoacetate groups and subsequently crosslinked using carbon‐Michael addition with PEG diacrylate. Gel fraction analysis, DMA, TGA, tensile, and swelling measurements were util…
Extended abstract of a paper presented at Microscopy and Microanalysis 2006 in Chicago, Illinois, USA, July 30 – August 3, 2006
Multiwalled carbon nanotubes were irradiated by 40keV Si ion beams with different doses, and the irradiation-induced structural transformation was characterized by scanning electron microscopy, transmission electron microscopy, and Raman spectroscopy. The formation of amorphous carbon nanowire and carbon nanowire netw…
[Image: see text] We report on the low-pressure plasma immobilization, characterization and application of thin films of hyperbranched glycoacrylates, poly(3-O-acryloyl-alpha,beta-D-glucopyranoside) (AGlc), on PTFE-like fluorocarbon surfaces. This method is an efficient and versatile way to immobilize sugar-carrying b…
Abstract Summary: Novel hybrid polymer brushes with alternating dendritic wedge and linear chain as side chains were reported in this paper. Firstly, dendronized polymer initiators of generation one to three, G n MIBr ( n = 1, 2, 3), were synthesized through the alternating copolymerization of styryl dendrons and male…
Abstract Summary: Functionalized PP samples with different percentages of grafted IA, i.e., 0.7, 1 or 1.8 wt.‐%, with similar molecular weights were used as compatibilizers in PP/clay nanocomposites. PP nanocomposites containing 1 wt.‐% of organically modified clays, i.e., montmorillonite, natural hectorite and synthe…