author = "Oishi, Silvia Sizuka and Silva, Lilian Mieko and Botelho, Edson 
                         Cocchieri and Rezende, Mirabel Cerqueira and Cairo, Carlos Alberto 
                         Alves and Ferreira, Neiden{\^e}i Gomes",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Universidade Estadual 
                         Paulista (UNESP)} and {Universidade Federal de S{\~a}o Paulo 
                         (UNIFESP)} and {Departamento de Ci{\^e}ncia e Tecnologia 
                         Aeroespacial (DCTA)} and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)}",
                title = "Influence of modified carbon substrate on boron doped 
                         ultrananocrystalline diamond deposition",
              journal = "Materials Research Express",
                 year = "2018",
               volume = "5",
               number = "2",
                pages = "e026405",
                month = "Feb.",
             keywords = "reticulated vitreous carbon, ultrananocrystalline diamond, 
             abstract = "Boron doped ultrananocrystalline diamond (B-UNCD) growth was 
                         studied on modified reticulated vitreous carbon (RVC) produced 
                         from poly(furfuryl alcohol) (PFA) resin with sodium hydroxide 
                         additions at two different heat treatment temperatures. The 
                         different amounts of NaOHin PFA (up to reaching pH values of 
                         around 3, 5, 7, and 9) aimed to neutralize the acid catalyst and 
                         to increase the PFA storage life. Besides, this procedure was 
                         responsible for increasing the oxygen content of RVC samples. 
                         Thus, the effect of carbon and oxygen coming from the substrates 
                         in addition to their different graphitization indexes on diamond 
                         morphology, grain size, preferential growth and boron doping level 
                         were investigated by FEG-SEM, x-ray diffraction and Raman 
                         spectroscopy. Therefore, B-UNCD films were successfully grown on 
                         RVC with pH values of 3, 5, 7, and 9 heat treated at 1000 and 1700 
                         degrees C. Nonetheless, the higher oxygen amount during B-UNCD 
                         growth for samples with pH 7 and 9 heat treated at 1000 degrees C 
                         was responsible for the RVC surface etching and the decrease in 
                         the boron concentration of such samples. The cross section images 
                         showed that B-UNCD infiltrated at around 0.9 mm in depth of RVC 
                         samples while carbon nanowalls were observed mainly on RVC samples 
                         heat treated at 1000 degrees C for all pH range studied.",
                  doi = "10.1088/2053-1591/aaaa82",
                  url = "http://dx.doi.org/10.1088/2053-1591/aaaa82",
                 issn = "2053-1591",
             language = "en",
        urlaccessdate = "15 jan. 2021"