In situ observation of maghemite nanoparticle adsorption at the water/gas interface M. Paulus, P. Degen, S. Schmacke, M. Maas, R. Kahner, B. Struth, M. Tolan and H. Rehage Eur. Phys. J. Special Topics, 167 (2009) 133-136 Published online: 05 February 2009 DOI: 10.1140/epjst/e2009-00948-1