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		<doi>10.1016/j.tsf.2014.05.037</doi>
		<issn>0040-6090</issn>
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		<citationkey>MiglioriniAleBalLanFer:2014:DoDiEl</citationkey>
		<title>Doped diamond electrodes on titanium substrates with controlled sp2/sp3 hybridization at different boron levels</title>
		<year>2014</year>
		<typeofwork>journal article</typeofwork>
		<secondarytype>PRE PI</secondarytype>
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		<author>Migliorini, Fernanda Lanzoni,</author>
		<author>Alegre, Marcela Dalprat,</author>
		<author>Baldan, Maurício Ribeiro,</author>
		<author>Lanza, Marcos Roberto Vasconcelos,</author>
		<author>Ferreira, Neidenei Gomes,</author>
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		<group>LAS-CTE-INPE-MCTI-GOV-BR</group>
		<affiliation>Instituto Nacional de Pesquisas Espaciais (INPE)</affiliation>
		<affiliation>Instituto Nacional de Pesquisas Espaciais (INPE)</affiliation>
		<affiliation>Instituto Nacional de Pesquisas Espaciais (INPE)</affiliation>
		<affiliation>Universidade de São Paulo (USP)</affiliation>
		<affiliation>Instituto Nacional de Pesquisas Espaciais (INPE)</affiliation>
		<electronicmailaddress>fernandamigliorini@yahoo.com.br</electronicmailaddress>
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		<electronicmailaddress>baldan@las.inpe.br</electronicmailaddress>
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		<electronicmailaddress>neidenei@las.inpe.br</electronicmailaddress>
		<e-mailaddress>neidenei@las.inpe.br</e-mailaddress>
		<journal>Thin Solid Films</journal>
		<volume>564</volume>
		<pages>97-103</pages>
		<secondarymark>A1_ENGENHARIAS_IV A1_ENGENHARIAS_II A2_MATERIAIS A2_ENGENHARIAS_III A2_INTERDISCIPLINAR B1_CIÊNCIA_DE_ALIMENTOS B1_MEDICINA_II B2_QUÍMICA B2_BIOTECNOLOGIA B2_ASTRONOMIA_/_FÍSICA B2_CIÊNCIAS_BIOLÓGICAS_I B2_CIÊNCIAS_BIOLÓGICAS_II B5_ENSINO</secondarymark>
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		<keywords>titanium, diamond, chemical vapor deposition.</keywords>
		<abstract>Doped diamond films on titanium substrate were systematically studied by controlling their sp2/sp3 hybridization as well as their boron doping levels. Samples were grown by hot filament chemical vapor deposition technique at CH4 additions of 1, 2, 6 and 10 sccmdiluted in H2 for a total flowrate of 200 sccm. For each CH4 concentration four doping levelswere studied. The boron sourcewas obtained froma constant flowof 40 sccmfor an additional H2 line passing through a bubbler containing the B2O3 dissolved in methanol with B/C ratios of 2000, 7000, 15,000, and 30,000 B/C ppm. Scanning electron microscopy images depicted well faceted films without cracks or delaminations. The sp2/sp3 ratio as purity index (PI) and the growth tendency index (GTI), associated to the TiC formation, were evaluated by Raman and X-ray spectra, respectively. GTI index was used in this work to analyze the competition between the diamond growth and TiC formation. It is also possible to associate the GTI index in terms of C/H ratio, sincewhen this ratio is increased, the GTI index also increased. A constant GTI increase was observed as a function of CH4 addition for the whole range of the boron doping studied. For PI, an optimized value was observed at 6 sccm of CH4 for the doping levels higher than 2000 ppm of B/C ratio.</abstract>
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		<language>en</language>
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