V T T T I E D O T T E I T A 2 0 5 5 Pekka Stén, Markus Olin & Jarmo Lehikoinen Surface complexation on iron oxides with reference to the oxide films formed on material surfaces in nuclear power plants V T T R E S E A R C H N O T E S TECHNICAL RESEARCH CENTRE OF FINLAND ESPOO 2000 0 d ψ d distance, x ψ ψ 0 An - An - An - Cat + Cat + OH OH 2 + O - OH OH OMe + OH Gouy-Chapman diffuse layer