Gold nanoparticles immobilization: Evidence of amination of diamond surfaces in liquid ammonia

作者：Charrier G; Aureau D; Goncalves A M; Collet G; Bouttemy M; Etcheberry A; Simon N^*

来源：Diamond and Related Materials, 2013, 32: 36-42.

DOI：10.1016/j.diamond.2012.11.014

• Diamond films
• BDD
• Amination
• Liquid ammonia
• Amino groups
• Oxygen terminations
• XPS
• Gold nanoparticles

Diamond presents many interesting properties in terms of biocompatibility, chemical inertness and is attractive for applications notably in the biosensor field. The formation of amine functional groups at diamond surface is of great interest for the incorporation of biomolecules. In the present work, we present an efficient direct amination method using anodic treatment in liquid ammonia on oxygen terminated diamond surface. Chemical surface modifications were followed by XPS analyses, while the distribution of amino-groups was indirectly studied by gold nanoparticles immobilization. The resulting surfaces were examined using FEG-SEM imaging. This combined approach has been powerful evidencing both the presence of notable amounts of amino groups after the electrochemical treatment in NH3liq and their homogeneous distribution at the diamond surface.

• 出版日期2013-2