The interaction of charged nanoparticles at interfaces Andreas S. Poulos, Doru Constantin, Patrick Davidson, Marianne Impéror-Clerc, Brigitte Pansu and Stéphan Rouzière EPL, 100 1 (2012) 18002 Published online: 15 October 2012 DOI: 10.1209/0295-5075/100/18002