In situ GISAXS study of the growth of Pd on MgO(001)

The morphology of growing Pd nano-particles on MgO(001) surfaces have been investigated in situ, during growth, by grazing incidence small angle x-ray scattering, for different substrate temperatures. The 2D patterns obtained are quantitatively analyzed, and the average morphological parameters (shape, size) deduced. Above 650 K, the aggregates adopt their equilibrium shape of truncated octahedron, and the interfacial energy is deduced.Comment: 10 pages, 1 Table, 2 Figure

"Sandwich" enzyme immunoassay for serum ferritin with polypropylene test tubes as the solid phase.

Abstract A "sandwich" enzyme immunoassay for ferritin in human serum is described, in which horseradish peroxidase-labeled antibody and a very sensitive chromogen, 2,2'-azino-di(3-ethyl-benzthiazolin-6-sulfonate), are used. The solid phase is polypropylene test tubes treated with glutaraldehyde; immunologic reactions are developed during constant rotation of the tubes. The assay requires 20 microL of serum per assay and takes less than 3 h. The standard curve is linear between 0 and 400 micrograms of serum ferritin per liter. Analytical recoveries of various amounts of standard added to a serum sample ranged from 92 to 98.6%. The sensitivity is 2 micrograms/L, which translates to 0.4 ng per assay tube. Within-run CV ranges from 1.6 to 5.4% and between-run from 4.2 to 7.8% according to the ferritin concentration. Results by competitive radioimmunoassay correlated well (r = 0.98). No "hook effect" was observed for concentrations up to 13 mg/L. The reference interval is 40-240 micrograms/L for men, 8-100 micrograms/L for women.</jats:p

Growth of Ag on MgO(001) studied in situ by grazing incidence small angle X-ray scattering

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Self-organized nanoclusters in solution-processed mesoporous In-Ga-Zn-O thin films

International audienceSelf-organized nanoclusters were obtained in annealed solution-processed In-Ga-Zn-O thin films. STEM and anomalous grazing incidence small-angle X-ray scattering (GISAXS) reveal the formation of nanometer-sized nanoclusters together with the spontaneous creation of a mesopore pattern

Defect-pinned nucleation, growth, and dynamic coalescence of Ag islands on MgO(001): An in situ grazing-incidence small-angle x-ray scattering study

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Adhesion of growing nanoparticles at a glance: Surface differential reflectivity spectroscopy and grazing incidence small angle x-ray scattering

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