Synchrotron radiation X-ray analysis of boron-doped diamond films grown by hot-filament assisted chemical vapor deposition

dc.creatorSilva, LLG
dc.creatorFranco, MK
dc.creatorYokaichiya, F
dc.creatorFerreira, NG
dc.creatorCorat, EJ
dc.date2002
dc.dateFEB
dc.date2014-11-19T13:58:05Z
dc.date2015-11-26T17:06:31Z
dc.date2014-11-19T13:58:05Z
dc.date2015-11-26T17:06:31Z
dc.date.accessioned2018-03-28T23:54:59Z
dc.date.available2018-03-28T23:54:59Z
dc.identifierDiamond And Related Materials. Elsevier Science Sa, v. 11, n. 2, n. 153, n. 159, 2002.
dc.identifier0925-9635
dc.identifierWOS:000174039500002
dc.identifier10.1016/S0925-9635(01)00573-8
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/73995
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/73995
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/73995
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1279876
dc.descriptionThis paper presents a synchrotron X-ray radiation analysis of boron-doped diamond films grown by hot-filament assisted chemical vapor deposition (HFCVD). The diamond films were grown at different doping levels with the introduction of boron to the gas mixture by bubbling hydrogen in a B2O3 solution in methanol. The B/C ratio in methanol varied from 2000 to 20 000 ppm and the gas flow rates were controlled so that boron incorporation to the film varied in the range from 10(18) to 10(21) boron/ cm(3). All other process parameters were kept unchanged to allow comparison only of the influence of the doping level. The film. analyses were performed at the X-ray diffraction beamline of the Laboratorio Nacional de Luz Sincrotron - LNLS, Brazil. The Debye-Scherrer configuration was used in this study. A high intensity monochromatic beam at lambda = 1.46 A was used and an excellent signal to noise ratio was obtained for 2theta varying from 20degrees to 150degrees. The difractogram for the undoped diamond film show intense peaks from the (111), (220), (311), (400) and (331) crystallographic planes. For the boron-doped films a set of new diffraction lines appear and their intensities increase considerably with the doping level. The set of diffraction peaks of similar intensities are related to a hexagonal structure and were assigned with hi-h confidence to tungsten carbide. This reveals that the boron-doping process in HFCVD facilitates the incorporation of tungsten carbide from the filament in the diamond film. The FWHM analysis of the diamond diffraction peaks shows a dependence of film crystallinity with doping level with a definite maximum at approximately 2.3 X 10(19) boron/cm(3). (C) 2002 Elsevier Science B.V. All rights reserved.
dc.description11
dc.description2
dc.description153
dc.description159
dc.languageen
dc.publisherElsevier Science Sa
dc.publisherLausanne
dc.publisherSuíça
dc.relationDiamond And Related Materials
dc.relationDiam. Relat. Mat.
dc.rightsfechado
dc.rightshttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.sourceWeb of Science
dc.subjectboron-doped diamond
dc.subjectsynchrotron radiation
dc.subjectX-ray diffraction
dc.subjectCvd-diamond
dc.subjectElectrodes
dc.subjectElectrochemistry
dc.subjectParameter
dc.titleSynchrotron radiation X-ray analysis of boron-doped diamond films grown by hot-filament assisted chemical vapor deposition
dc.typeArtículos de revistas


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