Berlin 2012 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 75: Particles and clusters
O 75.4: Vortrag
Donnerstag, 29. März 2012, 16:45–17:00, MA 041
Traceable size determination of spherical nanoparticles via Small Angle X-ray Scattering (SAXS) — •Gudrun Gleber1, Michael Krumrey1, Armin Hoell2, Levent Cibik1, Stefanie Marggraf1, and Peter Müller1 — 1Physikalisch-Technische Bundesanstalt, Abbestr. 2-12, 10587 Berlin — 2Helmholtz-Zentrum Berlin, Albert-Einstein-Str. 15, 12489 Berlin
Although various methods to measure the size of nanoparticles are available, the results of different methods often do not agree. In the framework of an European metrology project, several methods were used for traceable size determination and their results were compared.
As samples, spherical particles made of gold, PMMA, Silica, and Latex of nominal sizes between 10 nm and 200 nm in aqueous solution were used. The Small Angle X-ray Scattering (SAXS) experiments were performed at the Four-Crystal Monochromator (FCM) beamline in the laboratory of Physikalisch-Technische Bundesanstalt (PTB) at BESSY II using the SAXS setup of the Helmholtz-Zentrum Berlin (HZB). Besides the setup based uncertainties such as the uncertainties of photon energy, of detector pixel size, and of the distance between sample and detector, those based on the analysis process as e. g. assumption of particle shape, size distribution function, and background contribution were investigated.