Comment on “Liquid-Liquid Phase Transition in Supercooled Yttria-Alumina”
A Comment on the Letter by Adrian C. Barnes et al., Phys. Rev. Lett. 103 225702 (2009). The authors of the Letter offer a Reply.
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Barneset al.Reply:
A Reply to the Comment by G. N. Greaves et al.<br/><br/>
Stimuli Response of Cystamine-Core Dendrimer Revealed by Diffusion and NOE NMR Studies
Stimuli response behaviors of cystamine-core dendrimer in the presence of several reducing agents including vitamin C, sodium bisulfite, and DL-Dithiothreitol are described. A competitive redox cleavage and supramolecular aggregate formation model is proposed based on PFG NMR and (1)H NMR titration experiments. Furthe…
Superconducting energy gap in MgCNi3single crystals: Point-contact spectroscopy and specific-heat measurements
Specific heat has been measured down to 600 mK and up to 8 T by highly sensitive ac microcalorimetry on MgCNi${}_{3}$ single crystals with ${T}_{c}\ensuremath{\approx}$ 7 K. Exponential decay of the electronic specific heat at low temperatures proved that a superconducting energy gap is fully open on the whole Fermi s…
Formation of Boron‐Based Films and Boron Nitride Layers by CVD of a Boron Ester
Directing films: The chemical vapor deposition of (MeO)3B on a multilayered Rh(111) substrate results in selective precursor decomposition leading to a boride-type film. This film can be oxidized into a well-ordered boron nitride monolayer (see picture with model structure), thus opening up a new approach to BN system…
Thickness Dependence of Reflection−Absorption Infrared Spectra of Supported Thin Polymer Films
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTThickness Dependence of Reflection−Absorption Infrared Spectra of Supported Thin Polymer FilmsM. Djak†‡, E. Gilli†‡, Eero Kontturi*§, and R. Schennach*†‡View Author Information† Institute of Solid State Physics, Graz University of T…
Optical properties of metamaterials based on asymmetric double-wire structures
We performed theoretical and experimental investigations of the magnetic properties of metamaterials based on asymmetric double-wire structures. Using the multipole model for the description of metamaterials, we investigated the influence of the geometrical asymmetry of the structure on the macroscopic effective param…
Magnetic frustration in α-NaMnO2 and CuMnO2
The magnetic and electronic properties of α-NaMnO2 and delafossite CuMnO2 are investigated using a full-potential linearized augmented plane wave method. For the monoclinic structure at room temperature, CuMnO2 behaves like a frustrated spin-lattice. For the triclinic structure at low temperature, the obtained magneti…
Development of an organic vapor sensor based on functionalized porous silicon
Abstract Functionalization of hydrofluoric acid‐etched crystalline silicon surfaces were performed using 4‐aminopyridine. This treatment was employed to perform an organic interface with the exterior ambient. The obtained treated surfaces were exposed to different organic vapors while keeping track of their electric c…
Heat Capacity and Standard Thermodynamic Functions of the Wulfenite PbMoO4over the Temperature Range of (0 to 320) K
The heat capacity of natural lead molybdate (wulfenite, PbMoO 4 ) has been measured by the method of vacuum adiabatic calorimetry over the temperature range of (4.3 to 80) K, and its thermodynamic functions in the range from (0 to 320) K have been calculated. The obtained standard values are as follows: C p o (298.15)…
Effect of temperature treatment on the optical characterization of ZnO-Bi2O3-TiO2 varistor ceramics
The optical band-gap energy (Eg) is an important feature of semiconductors which determines their applications in optoelectronics. So, it is necessary to investigate the electronic states of ceramic ZnO and effect of doped impurities at different processing conditions. Eg of the ceramic ZnO + xBi2O3 + xTiO2 where x =…
Revealing low-dose radiation damage using single-crystal spectroscopy
The structural information and functional insight obtained from X-ray crystallography can be enhanced by the use of complementary spectroscopies. Here the information that can be obtained from spectroscopic methods commonly used in conjunction with X-ray crystallography and best-practice single-crystal UV-Vis absorpti…
Synthesis and characterization of colloidal gallium selenide nanowires
Abstract We report first to date ‘green’ metalorganic‐free synthesis of colloidal GaSe nanocrystals. Structure and optical properties of gallium selenide nanocrystals dispersed in oleylamine are discusses in respect to that conventionally prepared in alkylphosphonic solutions. We explore the organization of the partic…
SOx Oxidation and Adsorption by CeO2/MgO: Synergistic Effect between CeO2 and MgO in the Fluid Catalytic Cracking Process
The sulfur-transfer catalyst plays an important role in the fluid catalytic cracking (FCC) process through which the sulfur oxides (SO x ) are removed from flue gas. This work reports the synergistic effect between CeO 2 and MgO on the SO x oxidation and adsorption in the FCC process. The CeO 2 acts as the oxidation p…
Photochemical Synthesis of Monodispersed Ceria Nanocrystals in Simple Cerium Nitrate Solution without Additives
We developed a novel photochemical technique for preparation of ceria (CeO 2 ) nanocrystals in simple aqueous solution containing only Ce(NO 3 ) 3, where no additive and no heating are required. Under UV light illumination, photochemical reduction of NO 3 − resulted in formation of NO 2 − accompanied by hydroxyl radic…
Sulfur-Resistant NO Decomposition Catalysts Derived from Co−Ca/Ti−Al Hydrotalcite-like Compounds
Co 1.5 M 1.5 /Al 1− x Ti x hydrotalcite-like compounds (where M = Co, Ca and x = 0, 0.1) were synthesized by a constant-pH coprecipitation. The derived oxides from hydrotalcites upon calcination at 800 °C for 4 h were all of spinel phase without crystalline TiO 2 phase being detected. Substitution of partial Al for Ti…
Electrochemical and Optical Characterization of Triarylamine Functionalized Gold Nanoparticles
This paper describes the synthesis, structural analysis, and investigations of the optical and electrochemical properties of some gold nanoparticles (AuNPs) which consist of a triarylamine ligand shell attached to small gold cores (Au-Tara). The triarylamine chromophores were attached to small 4-bromobenzenethiol cove…
Demagnetizing factors for two parallel ferromagnetic plates and their applications to magnetoelectric laminated sensors
An analytical expression is derived to approximate the magnetometric demagnetizing factors for two parallel ferromagnetic plates having the shape of rectangular prisms. The magnetometric demagnetizing factors relate the average magnetic fields within the plates’ volumes to an external magnetic field. Knowing this rela…
Superfluid density measurements ofBa(CoxFe1−x)2As2films near optimal doping
We report on direct measurements of superfluid density, ${n}_{s}(T)\ensuremath{\propto}{\ensuremath{\lambda}}^{\ensuremath{-}2}(T)$, in films of Fe-pnictide superconductors. The magnetic penetration depth, \ensuremath{\lambda}(0), in our epitaxial, single-crystal $\mathrm{Ba}({\mathrm{Co}}_{x}{\mathrm{Fe}}_{1\ensurema…
Correlated single-crystal electronic absorption spectroscopy and X-ray crystallography at NSLS beamline X26-C
The research philosophy and new capabilities installed at NSLS beamline X26-C to support electronic absorption and Raman spectroscopies coupled with X-ray diffraction are reviewed. This beamline is dedicated full time to multidisciplinary studies with goals that include revealing the relationship between the electroni…