Influence of modified carbon substrate on boron doped ultrananocrystalline diamond deposition

Autor(es)

Oishi, Silvia Sizuka ^[1] ; Silva, Lilian Mieko ^[1] ; Botelho, Edson Cocchieri ^[2] ; Rezende, Mirabel Cerqueira ^[3] ; Alves Cairo, Carlos Alberto ^[4] ; Ferreira, Neidenei Gomes ^[1]

Afiliação do(s) autor(es)

^[1] INPE, LAS, Av Astronautas 1758, BR-12227010 Sao Jose Dos Campos, SP - Brazil

^[2] Univ Estadual Paulista UNESP, Dept Mat & Tecnol, Av Dr Ariberto Pereira da Cunha 333, BR-12516410 Guaratingueta, SP - Brazil

^[3] Univ Fed Sao Paulo UNIFESP, Inst Ciencia & Tecnol, Rua Talim 330, BR-12231280 Sao Jose Dos Campos, SP - Brazil

^[4] DCTA, Div Mat, AMR, IAE, BR-12228904 Sao Jose Dos Campos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: MATERIALS RESEARCH EXPRESS; v. 5, n. 2 FEB 2018.
• Citações Web of Science: 1

Resumo

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. (AU)

• Processo FAPESP: 14/27164-6 - Produção e caracterização de compósitos de carbono vítreo reticulado/nanodiamante/nanopartículas de prata aplicados na remoção de nitrato
• Beneficiário: Silvia Sizuka Oishi
• Linha de fomento: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 16/13393-9 - Eletrodos compósitos carbonosos, poliméricos e semicondutores visando a sinergia entre processos de limpeza de água e de armazenamento de energia
• Beneficiário: Neidenêi Gomes Ferreira
• Linha de fomento: Auxílio à Pesquisa - Regular