Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

CPP: Chemische Physik und Polymerphysik

CPP 4: New Experimental Techniques

CPP 4.6: Vortrag

Montag, 27. März 2006, 15:45–16:00, ZEU Lich

Energy Dispersive Small Angle X-Ray Scattering — •Tushar Sant¹, Wolfram Leitenberger², Tobias Panzner¹, and Ullrich Pietsch¹ — ¹Institute for Physics, University of Siegen, Walter Flex Strasse 3, D-57068 Siegen, Germany. — ²Institute for Physics, University of Potsdam, Am Neuen Palais 10, D-14469 Potsdam, Germany.

Small Angle X-ray Scattering is well known technique for characterizing polymers, colloids and biological samples. We performed energy dispersive small angle X-ray scattering (EDSAXS) experiments using white synchrotron radiation at Energy Dispersive Reflectivity (EDR) beamline at BESSY II. We measured EDSAXS spectra for Gold nanoparticles with diameter of about 12 nm and 40 nm solved in water. The extracted colloidal radius taken from EDSAXS spectra agree well with these obtained by monochromatic SAXS measurements at an in-house set-up. The main advantage of EDSAXS technique is the most reduced time consumption which required 3 minutes at EDR but 3 hrs for monochromatic measurement. This is useful for the systematic investigation of large series of samples or study of slow dynamical processes. The specific experimental conditions at BESSY II limit the accessible q range of investigation. This in turn puts the limit for the measurable size of the particles.