Influence of modified carbon substrate on boron doped ultrananocrystalline diamond deposition
| Autor: | Neidenêi Gomes Ferreira, Edson Cocchieri Botelho, Carlos Alberto Alves Cairo, Silvia Sizuka Oishi, Mirabel Cerqueira Rezende, Lilian Mieko da Silva |
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| Přispěvatelé: | Instituto Nacional de Pesquisas Espaciais (INPE), Universidade Estadual Paulista (Unesp), Universidade Federal de São Paulo (UNIFESP), AMR/IAE/DCTA - São Josédos Campos |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
inorganic chemicals
Materials science Polymers and Plastics chemistry.chemical_element 02 engineering and technology engineering.material 010402 general chemistry 01 natural sciences Oxygen Catalysis Furfuryl alcohol HFCVD Biomaterials chemistry.chemical_compound symbols.namesake reticulated vitreous carbon ultrananocrystalline diamond Metals and Alloys Diamond Substrate (chemistry) 021001 nanoscience & nanotechnology 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry Sodium hydroxide engineering symbols 0210 nano-technology Raman spectroscopy Carbon Nuclear chemistry |
| Zdroj: | Scopus Repositório Institucional da UNESP Universidade Estadual Paulista (UNESP) instacron:UNESP |
| Popis: | Made available in DSpace on 2018-12-11T17:36:15Z (GMT). No. of bitstreams: 0 Previous issue date: 2018-02-01 Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) 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 NaOH in 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 °C. Nonetheless, the higher oxygen amount during B-UNCD growth for samples with pH 7 and 9 heat treated at 1000 °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 °C for all pH range studied. LAS Instituto Nacional de Pesquisas Espaciais (INPE), Av. dos Astronautas 1758 Departamento de Materiais e Tecnologia Univ Estadual Paulista (UNESP), Av. Dr Ariberto Pereira da Cunha 333 Instituto de Ciĉncia e Tecnologia Universidade Federal de São Paulo (UNIFESP), Rua Talim 330 Divisão de Materiais/Instituto de Aeronáutica e Espaço AMR/IAE/DCTA - São Josédos Campos Departamento de Materiais e Tecnologia Univ Estadual Paulista (UNESP), Av. Dr Ariberto Pereira da Cunha 333 CNPq: 162683/2013-8 FAPESP: 2014/27164-6 FAPESP: 2016/13393-9 CNPq: 302017/2015-1 |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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