@InProceedings{MatsushimaSilAzeBalFer:2008:SyStCa,
               author = "Matsushima, J. T. and Silva, W. M. and Azevedo, Adriana Faria and 
                         Baldan, Maur{\'{\i}}cio Ribeiro and Ferreira, Neidenei Gomes",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)} and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)} and {Instituto Nacional de Pesquisas Espaciais 
                         (INPE)}",
                title = "Systematic study of cathodic pre-treatment influence on surface 
                         properties and electrochemical behavior of boron doped diamond 
                         produced at different doping levels",
            booktitle = "Anais...",
                 year = "2008",
         organization = "Encontro SBPMat, 7.",
             keywords = "diamond films, x-ray photoelectron spectroscopy, electrochemistry 
                         electroanalysis, charge transfer kinetics.",
             abstract = "New materials research for electrochemical applications has been a 
                         challenge in the last few years. Microcrystalline chemical vapor 
                         deposition (CVD) boron-doped diamond (BDD) films have demonstrated 
                         to be a proper electrode due to its remarkable properties [1,2]. 
                         The high importance of synthetic conductive diamond is correlated 
                         to demanding applications such as wastewater treatment, 
                         electroanalysis and electrosyntesis, besides energy storage 
                         devices [3,4]. Thus, the rigorous control of diamond growth 
                         parameters is determinant to produce the suitable electrode for 
                         the required application. A systematic study of deposition, 
                         characterization, and electrochemical sensitivity of BDD is 
                         reported taking into account four different doping levels with 
                         high accuracy of its growth parameters that define its surface 
                         properties. So, eight different sample sets were prepared by hot 
                         filament CVD technique using the standard mixture of H2/CH4. The 
                         boron source in the precursor mixture was obtained from an 
                         additional H2 flux passing through a bubbler containing different 
                         concentrations of B2O3 dissolved in methanol. Before finishing the 
                         growth process the films were kept inside the reactor in a pure 
                         hydrogen flux to improve the hydrogen bond in diamond surface. 
                         Diamond quality, morphology and crystallinity were characterized 
                         by scanning electron microscopy, Raman spectroscopy and x-ray 
                         diffraction techniques while the changes in film surfaces were 
                         analyzed by contact angle, cyclic voltammetry and synchrotron 
                         X-ray photoelectron spectroscopy. Each sample set followed a 
                         rigorous procedure to analyze the influence of aqueous media in 
                         BDD surface for each boron doping. This control is very important 
                         because as the boron level increases the grain size decreases 
                         enhancing the the sp2 density at the film grain boundary. The BDD 
                         hydrophobicity, reversibility, work potential window 
                         characteristics, as a function of the doping level, were related 
                         with its physical properties and its chemical surface; mainly 
                         associated with its natural oxidation (as-prepared BDD) or with 
                         its changing behavior forced by the cathodic pre-tratment.",
  conference-location = "Guaruj{\'a}, SP",
      conference-year = "28 set. - 02 out.",
             language = "en",
        urlaccessdate = "16 jun. 2024"
}