PPT-Introduction to X-Ray Fluorescence

NON DESTRUCTIVE CHEMICAL ANALYSIS Notes by Dr Ivan Gržetić professor University of Belgrade Faculty of Chemistry What are XRays Photons with a wavelength between 10 9 and . Chelsea Aitken. Peter Aspinall. Advantages Over Light Microscopy. Resolution of light microscopy limited by Rayleigh Criterion. If two objects cannot be seen as distinct structures, then they may be considered coincident in space. . What is a . fluorescence. ?. Wiki. : emission of light by a substance that has absorbed light or other electromagnetic radiation of a different wavelength.. The name coined by George Gabriel Stokes in 1852 “. . M. . Uherek. 1. , J. . Fischerova. 2. . and. . D. . Chorvat. . jr. .. 1,2. 1. International Laser Centre, Bratislava, Slovakia . 2. Faculty of Mathematics, Physics and Informatics, Comenius University,. Ozkans. ’. laboratory in UC-Riverside to perform defect analysis and surface metrology of large-area CVD-graphene sheets. This method utilizes the quenching of fluorescence from dye molecules by graphene via resonant energy transfer to increase the visibility of graphene on a glass substrate. A large-area fluorescence montage image of the dyed graphene sample is collected and processed to identify the graphene and indicate the graphene layer thickness throughout the entire graphene sheet. Furthermore, chemically functionalized (doped with fluorine) parts of graphene film is visualized using the same technique. The emission of the dye is quenched to a different extent by fluorinated and pristine graphene, which provides the fluorescence-imaging contrast essential for this method. The regions with pristine graphene appear darker on the fluorescence images than the regions with fluorinated graphene, enabling large-scale mapping of the functionalized regions in CVD grown graphene sheets. Complex circular patterned regions of doped and pristine graphene regions are resolved with great accuracy. This method is posed for widespread adoption by graphene manufacturers as a basis for facile and high throughput metrology of large scale graphene sheets. Finally, this work featured as cover articles in . Lyes. . Lakhal. Institut Polytechnique . LaSalle. Beauvais. Rue Pierre WAGUET. BP 30313. F-60026 BEAUVAIS . Cedex, France.. . Workshop on Tensor Decompositions and . Applications. , . 2010. Sept. 13-17, 2010, Monopoli, Bari, Italy. Centaurus. X-3 Over its Binary Orbit”. -. Sachindra. Naik, . Biswajit. Paul, and . Zulfikar. Ali. Introduction:. Interest: Extended dips in the light curve. Cen-X: Eclipsing HMXRB pulsar. Orbital period ~2.1 days, pulse period ~4.8 s. with matter. Interaction of x-ray photons with matter. . When a beam of x-ray photons passes through matter, its intensity (energy . –. or number of x-ray photons - flowing per second) is reduced: . standardless. ” . analysis. NON DESTRUCTIVE CHEMICAL ANALYSIS. Notes. by:. Dr Ivan Gržetić, professor. University of Belgrade – Faculty of Chemistry. Qualitative, quantitative analysis and “. By: . Maarya. . H. aq. An . I. ntroduction to Man Ray . Emmanuel . Radnitzky. . 1890-1976. American visual artist. Painter, Photographer, Filmmaker . Invented . Rayographs. . Significant contributor to Dada and Surrealist movements but ties to each were informal . Visible structures. 1.  - Trachea. 2.  - Hila. 3.  - Lungs. 4.  - Diaphragm. 5.  - Heart. 6.  - Aortic knuckle. 7.  - Ribs. 8.  - Scapulae. 9.  - Breasts. 10.  - Bowel gas. Normal chest X-ray anatomy. Dr. . . (. Mrs. ). Uma. . Sharma. Professor. School of Studies in Chemistry & Biochemistry, . Vikram. University,. UJJAIN (M.P.) . S.S. IN CHEMISTRY & BIOCHEMISTRY. Based on the properties of X-rays, a number of . ABRAÃO NOVA, FREDERICO RIBEIRO, PAMALLA OLIVEIRA, DANIEL AMANCIO, CÁSSIA MACHADO, ALEXANDRA CAROLINA, MARCIO PAIXÃO, ANTONIO ANTONINO, ENIVALDO BARBOSA, ANTONIO BARBOSA, MARIA LOURENÇO, MARCOS RODRIGUES, AND RICHARD HECK. of a . fluorophore. FLT does not depend on . fluorophore. concentration, absorption by the sample, sample thickness, method of measurement, fluorescence intensity, photo-bleaching, and/or excitation intensity. It is affected by external factors, such as temperature, polarity, and the presence of fluorescence quenchers. Fluorescence lifetime is sensitive to internal factors that are dependent on . Djoshkun Shengjuler (JOJO). Cameron Lab. Feb. 25. th. , 2015. PSU-BMB. Outline. History. Measurement. Principle. Advantages/Disadvantages. Applications. Case studies (3). Special Considerations. History.