Materials Literature
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Surface-enhanced Raman scattering (SERS) of benzoate recorded on silver electrode have been analyzed on the basis of a charge transfer (CT) enhancement mechanism similar to a resonance Raman (RR) process where a photoinduced electron transfer between a metal and an adsorbate takes place. Given that benzoic acid (BzH)…
Treatment of the trichlorides EuCl(3) and YbCl(3) with Na(H(3)BNMe(2)BH(3)) in tetrahydrofuran (THF) results in a reduction to the corresponding divalent europium and ytterbium N,N-dimethylaminodiboranate (DMADB) complexes Eu(H(3)BNMe(2)BH(3))(2)(THF)(2) (1) and Yb(H(3)BNMe(2)BH(3))(2)(THF)(2) (2), which can be separa…
Gold-alginate bionanocomposite films were prepared by impregnation of alginate films with HAuCl(4) followed by reduction with glucose. The mannuronate over guluronate ratio (M/G) of the polymer as well as the initial polymer concentration were shown to influence the film thickness, the amount of trapped Au(3 + ) ions,…
A series of six tetradentate polypyridine-type ligands (L) have been used to prepare the corresponding Eu(III) complexes [Eu(L)(2)(S)](n+) (n = 2, 3) where S = H(2)O or CF(3)SO(3)(-). Two of the ligands, 2,9-di(pyrid-2'-yl)-1,10-phenanthroline (4) and its dipyridophenazine analogue (6) are symmetrical around a central…
Abstract An unprecedented dodecanuclear Co III 3 Co II 9 and a dinuclear Co II 2 cluster were synthesized facilely from reactions of different coblt(II) salts with the ligand (1 H ‐benzimidazol‐2‐yl)methanol. The cobalt ions in the Co 12 supercluster are linked into a disclike structures through μ 3 ‐O L , μ‐O L , μ 3…
A heat transfer model that couples radiation/conduction/convection heat transfer with electrical potential distribution is developed for a thermoelectric converter (TEC) subjected to concentrated solar radiation. The 4-leg TEC module consists of two pairs of p-type La1.98Sr0.02CuO4 and n-type CaMn0.98Nb0.02O3 legs tha…
Abstract Cathodoluminescence spectra recorded with high spatial and wavelength resolution on tilted ZnO epitaxial layers allow to identify a very prominent emission peak at 3.314 eV as a free electron to shallow acceptor ( E A ≈ 130 meV) transition. By correlation with TEM cross‐section images recorded on the same sam…
Carbon nanocubes and nanobricks were synthesized by pyrolyzing rice powder at 600 degrees C under nitrogen atmosphere. Purification with concentrated nitric acid introduced approximately 0.1 mol/g of carboxylic acid groups as found by acid-base titrimetric analysis. XRD pattern showed the 0.15 mol/g basic graphitic st…
Abstract Graphite is a clean substrate and its nanostructures hold great potential for applications. Anchoring large molecules on graphite represents a challenge for several reasons that essentially rise from the planar bonds of the packed honeycomb structure of carbon. Here, a systematic investigation by AFM and XPS…
Exploratory syntheses in the M-Au-Ge (M = Ca, Yb) systems have led to the discovery of two cleanly separated non-stoichiometric phases M(3)Au(approximately 14.4)Ge(approximately 4.6) (I) and M(3.25)Au(approximately 12.7)Ge(approximately 5.3) (II). Single crystal X-ray studies reveal that both (space group Im3) feature…
We report on the synthesis of nanocomposites with integrated ellipsoidal silica-coated hematite (SCH) spindle type nanoparticles which can act as crosslinking agents within an elastomeric matrix. Influence of the surface chemistry of the hematite, leading either to dispersed particles or crosslinked particles to the e…
Containerless high energy X-ray diffraction measurements have been performed on molten Al(2)O(3)-SiO(2) as a function of composition. The data show a strong distortion of the SiO(4) tetrahedral units and a breakdown of intermediate range order as alumina is added. For silica-rich compositions, the X-ray pair distribut…
In the pharmaceutical industry, controlling the crystallization process of active pharmaceutical ingredients (API) is crucial to ensure chemical quality and physical properties. Process analytical technologies (PAT) provide a large number of tools that provide information in real-time to allow mastery of the final sol…
ZrO 2 was prepared via the hydrothermal method and used as the support of nickel catalysts in the partial oxidation of methane to syngas. The hydrothermal conditions (such as hydrothermal temperature, hydrothermal time, and the concentration of NaOH used) necessary for ZrO 2 preparation were investigated and optimized…
(7)Li and (1)H nuclear magnetic resonance together with X-ray diffraction measurements in powdered samples and pseudocrystalline films of synthetic fluorhectorite as a function of relative ambient humidity permit to address several aspects of the structure and dynamics of intercalated water molecules. The role of prot…
A quantitative analysis of long-range order in the self-organized porous structure of anodic alumina films has been performed on the basis of a microradian X-ray diffraction study. The structure is shown to possess orientational order over macroscopic distances larger than 1 mm. At the same time, the interpore positio…
Abstract To investigate the dispersion and nanofillers' interaction of rod‐like silicates (attapulgite, ATT) in the polymethylmethacrylate (PMMA) matrix, a novel in situ modification of ATT by toluene‐2,4‐di‐isocyanate (TDI) using mechanical mixing was exploited, which resulted in homogeneous dispersion and rod‐like t…
Pore structures and electrochemical performances of mass-produced metal-free single-walled carbon nanotubes (mf-SWCNTs) heated in either CO 2 gas or dry air were investigated. Pore structures, defects, and electrochemical performances of mf-SWCNTs were analyzed mainly using the N 2 adsorption method, apparent density…
High‐surface area, nanocrystalline powders of two closely related peroviskite oxides, LaFeO 3 and LaMnO 3 , were produced by aqueous combustion synthesis using two different fuels. LaMnO 3 powders synthesized using glycine fuel had a higher surface area and a smaller crystallite size than when synthesized using ethyle…
The carbon nanotube-metal nanoparticle complex has attracted a lot of research interest because of their potential applications in catalysis and gas sensing. Here we introduce a novel electrochemical method to realize in-situ decoration of single-walled carbon nanotube field effect transistors (CNT-FET) with metal nan…