The growth of Pt particles electrochemically deposited onto boron-doped diamond thin films supported by silicon wafers has been studied by cyclic voltammetry and by atomic force microscopy. On a small number of diamond sites the initially electrodeposited. Pt particles present a fast growth, which can be attributed to a better electrical conductivity resulting from a higher local concentration of boron used in the boron-doped diamond films as doping centres. (c) 2005 Elsevier B.V. All rights reserved.