Materials Literature
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We investigate the impurity scattering rates for quasiparticles in vortex cores of sign-reversing $s$-wave superconductors as a probe to detect the internal phase difference of the order parameters among different Fermi surfaces. The impurity scattering rates and coherence factors are related to quasiparticle interfer…
ADVERTISEMENT RETURN TO ISSUECommunication to the...Communication to the EditorNEXTChiroptical Induction and Molecular Recognition in Optically Active Hyperbranched Polyethers with Inherently Chiral Benzophenone CoreLourdes Pastor-Pérez†, Ulrike Kemmer-Jonas‡, Frederik Wurm‡, Salah-Eddine Stiriba*†, Julia Pérez-Prieto…
In this study, an adhesive of a polyurethane derivate from castor oil was irradiated with gamma radiation from a 60Co source, at doses from 0.2 to 25 kGy. This adhesive polyurethane is considered for use in hospital furniture because it does not liberate dangerous solvents. Hardness and elastic modulus were measured b…
Abstract The optical properties of two‐dimensional assemblies of metal nanoparticles are strongly influenced by the morphological configuration of the metal particles in the layer. Therefore, we correlate the structural and optical properties of two‐dimensional, hexagonal gold nanoparticle arrays. We characterize the…
A simple approach for the fabrication of graphene layers by self-limited oxidation of graphite flakes through a one-step annealing process is reported. Parallel graphene ribbons are readily formed by converting prepatterned graphite belts. This method indicates the feasibility of the controllable formation of graphene…
A variety of photosensitizers has been included, adsorbed or grafted onto different supports. This review focuses on original new materials designed for photoinduced oxygenation reactions, using light as the activation method and oxygen as the reactant. Such materials find widespread applications for the oxidation of…
The crystal structure solution of the title compound is determined from microcrystalline powder using a multi-technique approach that combines X-ray powder diffraction (XRPD) data analysis based on direct-space methods with information from (13)C solid-state NMR (SSNMR), and molecular modelling using the GIPAW (gauge…
This study is focused on understanding the effects of kaolinite content and freezing rate on the microstructure, surface area, and flexural strength of freeze‐cast kaolinite–silica nanoparticle composites. Scanning electron microscopy reveals that the bulk of the composites contain interconnected pores and that the si…
Abstract The macroscopic properties of most materials are strongly influenced by grain size. In ceramic materials the microstructure usually results from the sintering process. Understanding the basic mechanisms of grain growth on an atomic length scale in ceramics would be beneficial to tailor the microstructure for…
We report a new and simple method for the formation of thin films at the interface between aqueous silica Ludox dispersions and lipid solutions in decane. The lipids used are stearic acid, stearyl amine, and stearyl alcohol alongside silica Ludox nanoparticle dispersions of varying pH. At basic pH thin films consistin…
CoFe(2)O(4)-TiO(2) and CoFe(2)O(4)-ZnO nanoparticles/film composites were prepared from directed assembly of colloidal CoFe(2)O(4) in a Langmuir-Blodgett monolayer and atomic layer deposition (ALD) of an oxide (TiO(2) or ZnO). The combination of these two methods permits the use of well-defined nanoparticles from coll…
Vertical and adiabatic ionization potentials of Na2X (X = SH, SCH3, OCH3, CN, and N3) superalkali molecules have been studied using the ab initio methods. The smallest vertical ionization potential was calculated for the Na2OCH3 system (4.365 eV). The Na2X molecules were found to be capable of forming stable [Na2X]+[Y…
Rapid nitridation was used to fabricate reaction‐bonded and postsintered β‐Si 6− Z Al Z O Z N 8− Z ( Z =1) ceramics with monoclinic ZrO 2 added to the starting powder. Thermo‐gravimetric analysis revealed that the addition of ZrO 2 reduced the starting temperature of the main nitridation reaction. Using a reaction‐bon…
Nanocrystalline gadolinia‐doped ceria (GDC) specimens with grain sizes ranging from 10 to 100 nm were studied by AC‐impedance spectroscopy over the temperature range of ∼150°–∼300°C, and were analyzed by the nanograin composite model (n‐GCM), which is capable of extracting local properties (grain‐core conductivity, gr…
The electronic as well as magnetic properties of ${\text{Ga}}_{x}{\text{Fe}}_{1\ensuremath{-}x}$ films were studied by soft x-ray measurements. Using x-ray magnetic circular dichroism the Fe majority-spin band was found to be completely filled for $x\ensuremath{\approx}0.3$. With further enhanced Ga content, the Fe mo…
We report the use of scanning tunneling spectroscopy (STS) to investigate one-dimensional quantum confinement effects in lead sulfide (PbS) thin films. Specifically, quantum confinement effects on the band gap of PbS quantum wells were explored by controlling the PbS film thickness and potential barrier height. PbS qu…
In situ dispersive X-ray absorption spectroscopy (DXAS) measurements were used to monitor the Pt nanoparticle formation by hydrogen reduction of PtO 2 at 150 °C. The kinetics of the reduction process, as well its dependence on the percentage of H 2 in the reductive gas mixture, was investigated. The results reveal tha…
The adsorption and reaction of ethylene on Pt/CeO(2-x)/Cu(111) model catalysts were studied by means of high resolution photoelectron spectroscopy (HR-PES) in conjunction with resonant photoemission spectroscopy (RPES). The dehydrogenation mechanism is compared to the HR-PES data obtained on a Pt(111) single crystal u…
We investigate the electronic and magnetic properties of (Ga,Mn)N nanocrystals using the density functional theory. We study both wurtzite and zinc-blende structures doped with one or two substitutional Mn impurities. For a single Mn dopant placed close to surface, the behavior of the empty Mn-induced state, hereafter…
Adhesive tapes are attached to human skin for various purposes. When they are removed by peeling, discomfort or trauma may occur. Typically, the removed tape is partially covered by skin cells, and peeling involves failure within the substrate (skin), rather than just interfacial failure between the adhesive and the s…