Electronic edition ISSN 1574-0579

Particle size analysis of ferrofluids.

J. Embs^1,2 , H. W. Muler⁴ , C. E. Krill III² , F. Meyer³ , H. Natter³ , B. Muler⁴ , S. Wiegand⁴ , M. Luke¹ , R. Hempelmann³ , K. Knorr²

¹ Theoretische Physik, Universität des Saarlandes, Postfach 151150, D-66041
² Technische Physik, Universität des Saarlandes, Postfach 151150, D-66041
³ Physikalische Chemie, Universität des Saarlandes, Postfach 151150, D-66041
⁴ Max-Planck-Institut für Polymerforschung, Ackermannweg 10, D-55128 Mainz

Abstract
We present a comparative experimental investigation of the particle size in ferromagnetic colloids (ferrofluids). The results corroborate a new method, which allows to deduce the core diameter D and the hydrodynamic particle diameter D^hyd simultaneously under in-situ conditions, i.e. without a dilution of the sample. Tables 5, Figs 3, Refs 18.