With the development of chemical vapour deposition techniques, and thanks to its chemical and electrical properties, boron-doped nanocrystalline diamond has attracted the interest of electrochemists for various applications from chemical sensing to water treatment. Potential applications, such as super capacitors and dye sensitized solar cells, would greatly benefit from an increase in specific surface area. We recently reported a promising simple multilayer process using SiO2 nanofibres as a 3D template to produce thick porous boron doped diamond (PBDD). In this article, we further describe the optimization and characterization of thick PBDD layers: addressing diamond seeding issues and report on electrical conductivity and electrochemical properties. Fabricated PBDD layers were characterized by scanning electron microscopy, micro-Raman spectroscopy, and cyclic voltammetry in aqueous electrolyte solution. Finally, fabrication of thick free-standing PBDD layer is demonstrated.Keywords: Porous materials, boron doped diamond, electrochemistry, nanofibres, MW PECVD
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