Light Metal Hydrides and Complex Hydrides for Hydrogen Storage
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Single electron emission from the closed-tips of single-walled carbon nanotubes
The single electron emission behaviors and characteristics from the well-defined quantized energy levels, corresponding to localized electronic states at the dome-structure tips, in single-walled carbon nanotubes (SWNTs) are investigated and illuminated by use of the energy level emission model in combination with the…
Crystal Structure and Morphology of Poly(12-dodecalactone)
Poly(12-dodecalactone) (PDDL) crystals in the form of chain-folded lamellae were prepared by isothermal crystallization from a 1-hexanol solution. The lozenge-shaped crystals with and without spiral growth have been studied by transmission electron microscopy and atomic force microscopy. Wide-angle X-ray diffraction d…
Mass spectrometry and database search in the analysis of proteins from the fungus Pleurotus ostreatus
Tandem mass spectrometry is a method of choice for rapid analysis in proteomics. Identification and characterization of proteins from organisms with sequenced genomes is today a routine procedure as will be identification of proteins from organisms with unsequenced genomes with new developing tools. Here, we report th…
Surfactant free fabrication of polymeric nanoparticles by combined liquid–liquid phase separation and solvent/nonsolvent mixing technology
It is generally agreed that, in most cases, surfactants are required to obtain stable polymeric nanoparticle dispersions. Here, we report a method which can be used to produce surfactant free yet stable polymeric nanoparticle dispersions. This method is based on explored mechanism of selective solvation of nanoparticl…
The evolution of electroluminescence in Ge quantum-dot diodes with the fold number
The electroluminescence of the light-emitting diodes with five-, ten and 30-fold p-type Ge quantum dots grown on n+ Si substrates is studied. The enhanced integral electroluminescence intensity and blueshift of the 30-fold one at high temperature (>200K) act contrary to those in five- and ten-fold ones. It is a…
Protein phase diagrams: The physics behind their elliptic shape
We relate the condition for the elliptic shape of the phase diagram of proteins to the degree of correlation in the fluctuations of the changes of enthalpy and volume at the denaturing-refolding transition. Since this degree cannot be larger than 1, hyperbolically shaped diagrams are not likely to exist. Experiments s…
X-ray standing wave analysis of theSn∕Si(111)−√3×√3surface
The $1∕3\phantom{\rule{0.3em}{0ex}}\text{monolayer}$ (ML) $\mathrm{Sn}∕\mathrm{Si}(111)\text{\ensuremath{-}}(\ensuremath{\surd}3\ifmmode\times\else\texttimes\fi{}\ensuremath{\surd}3)R30\ifmmode^\circ\else\textdegree\fi{}$ surface structure has been extensively studied using low-energy electron diffraction (LEED) and x…
Record high extreme-ultraviolet efficiency at near-normal incidence from a multilayer-coated polymer-overcoated blazed ion-etched holographic grating
We have measured the extreme-ultraviolet (EUV) efficiency of a polymer-overcoated blazed ion-etched holographic test grating. The grating had a magnetron-sputtered Mo2C/Si multilayer coating matched to the grating blaze angle of 2.78 degrees. At an angle of incidence of 5.6 degrees and a wavelength of 15.79 nm, the me…
Flame-retardant Mechanism Resulting from an Intumescent System
In this work, we studied the flame-retardant (FR) mechanism resulting from an intumescent phenomenon of the FR formulation: polyurethane polymer/ammonium polyphosphate/triazine carbonific (PU/APP/Carbonific). The FR properties (LOI and cone calorimeter) of the system were strongly improved in comparison with the PU an…
Short and Long Range Magnetic Ordering in β-MnO2–A Temperature Study–
The magnetic long range ordering (LRO) and short range ordering (SRO) in β-MnO 2 has been studied by neutron powder diffraction. Below T N =92.5(1) K β-MnO 2 has an incommensurate modulated magnetic LRO with temperature dependent propagation vector length k z . The values of k z show a maximum, corresponding to k z =…
Reactivity of Atomic Cobalt with Molecular Oxygen: A Combined IR Matrix Isolation and Theoretical Study of the Formation and Structure of CoO2
The reactivity of atomic cobalt toward molecular oxygen in rare gas matrices has been reinvestigated. Experiments confirm that Co atoms in their a(4)F ground state are inert toward O(2) in solid argon and neon but reactive in the b(4)F first excited state, in agreement with the previous gas-phase study of Honma and co…
Electron field emission from various morphologies of fluorinated amorphous carbon nanostructures
Unlike general fluorination, amorphous fluorinated carbon (a-C:F) nanostructures have been synthesized directly and efficiently by an electron cyclotron resonance chemical vapor deposition (ECR–CVD) system using a mixture of C2H2, CF4, and Ar as precursors. The electron field-emission properties of the a-C:F nanostruc…
Osseous metaplasia in the setting of nephrogenic fibrosing dermopathy
BACKGROUND: Nephrogenic fibrosing dermopathy (NFD) is a new skin-fibrosing disorder associated with renal dysfunction. It is marked by the acute onset of induration involving the upper and lower limbs, and it is characterized by distinctive histopathologic findings. METHODS: We report the case of a patient on hemodial…
Neutron Diffraction Study of Successive Magnetic Phase Transitions in Ferroelectric TbMn2O5
Neutron diffraction measurements have been performed on a single crystal of TbMn 2 O 5 to elucidate the interplay between magnetic ordering and ferroelectricity. On cooling below T N1 = 42 K, the system enters a lock-in commensurate magnetic (CM) state with the magnetic propagation vector q = (1/2,0,1/4) from a two-di…
Influence of Monomer Optical Purity on the Conformation and Properties of Chiral, Donor-Embedded Polybinaphthalenes for Nonlinear Optical Purposes
A series of chiral, chromophore-functionalized donor-embedded polybinaphthalenes were prepared by a Stille coupling reaction between a diiodo-functionalized chromophore and a bis(trimethyltin)binaphthalene derivative. The optical purity of the chiral binaphthalene monomer was varied, and its influence on the conformat…
Catalytic partial oxidation of methane in a high‐temperature reverse‐flow reactor
Abstract The production of hydrogen and synthesis gas (syngas) from methane is a key technology for the twenty‐first century. It is currently performed predominantly by steam reforming of methane. An alternative reaction route is the direct catalytic partial oxidation of methane (CPOM) at high‐temperature, short conta…
Photoreactive phase conjugation strength in disperse red 1 doped poly(methylmethacrylate) thin films
Near-resonant optical pumping was used to modulate third-order susceptibility χ(3) in disperse red 1 doped poly(methylmethacrylate) thin films. An optically pumped degenerate four-wave mixing (DFWM) experiment was conducted to examine the photoreactive phase conjugation (PC) signals. Experimental results indicated a l…
Hydrogen‐bonded polyurethane complexes based on 4‐alkoxybenzoic acids as the low molar mass components
Abstract Supramolecular polyurethane complexes based on a polyurethane with a pendant pyridyl unit (PUPy) as the hydrogen bond acceptor and 4‐octyloxybenzoic acid (OOBA) or 4‐butyloxybenzoic acid (BOBA) as the hydrogen bond donor were prepared. The primary driving force for the formation of these complexes is the hydr…
Influence ofCodoping on the charge-ordering state of the bilayered manganiteLaSr2Mn2O7
The effect of $\mathrm{Co}$ doping on transport and magnetic properties of bilayered manganite ${\mathrm{LaSr}}_{2}{\mathrm{Mn}}_{2}{\mathrm{O}}_{7}$ charge ordering (CO) state is first investigated. With $\mathrm{Co}$ doping, CO and metal-insulator transition disappear and the resistivity behaves as semiconducting be…