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dc.contributor.authorZkria, Abdelrahman ( Orcid Icon 0000-0003-0928-8752 )
dc.contributor.authorGima, Hiroki ( )
dc.contributor.authorAbubakr, Eslam ( Orcid Icon 0000-0001-9901-5525 )
dc.contributor.authorMahmoud, Ashraf ( )
dc.contributor.authorHaque, Ariful ( Orcid Icon 0000-0002-4285-9951 )
dc.contributor.authorYoshitake, Tsuyoshi ( Orcid Icon 0000-0002-5780-5585 )
dc.date.accessioned2022-11-22T18:17:05Z
dc.date.available2022-11-22T18:17:05Z
dc.date.issued2022-03-03
dc.identifier.citationZkria, A., Gima, H., Abubakr, E., Mahmoud, A., Haque, A., & Yoshitake, T. (2022). Correlated electrical conductivities to chemical configurations of nitrogenated nanocrystalline diamond films. Nanomaterials, 12(5), 854.en_US
dc.identifier.issn2079-4991
dc.identifier.urihttps://digital.library.txstate.edu/handle/10877/16334
dc.description.abstractDiamond is one of the fascinating films appropriate for optoelectronic applications due to its wide bandgap (5.45 eV), high thermal conductivity (3320 W m−1·K−1), and strong chemical stability. In this report, we synthesized a type of diamond film called nanocrystalline diamond (NCD) by employing a physical vapor deposition method. The synthesis process was performed in different ratios of nitrogen and hydrogen mixed gas atmospheres to form nitrogen-doped (n-type) NCD films. A high-resolution scanning electron microscope confirmed the nature of the deposited films to contain diamond nanograins embedded into the amorphous carbon matrix. Sensitive spectroscopic investigations, including X-ray photoemission (XPS) and near-edge X-ray absorption fine structure (NEXAFS), were performed using a synchrotron beam. XPS spectra indicated that the nitrogen content in the film increased with the inflow ratio of nitrogen and hydrogen gas (IN/H). NEXAFS spectra revealed that the σ*C–C peak weakened, accompanied by a π*C=N peak strengthened with nitrogen doping. This structural modification after nitrogen doping was found to generate unpaired electrons with the formation of C–N and C=N bonding in grain boundaries (GBs). The measured electrical conductivity increased with nitrogen content, which confirms the suggestion of structural investigations that nitrogen-doping generated free electrons at the GBs of the NCD films.en_US
dc.formatText
dc.format.extent12 pages
dc.format.medium1 file (.pdf)
dc.language.isoenen_US
dc.publisherMultidisciplinary Digital Publishing Instituteen_US
dc.sourceNanomaterials, 2022, Vol. 12, No. 05, Article 854, pp. 1-12.
dc.subjectDiamond filmsen_US
dc.subjectNanodiamond compositeen_US
dc.subjectPhysical vapor depositionen_US
dc.subjectNEXAFS spectraen_US
dc.titleCorrelated Electrical Conductivities to Chemical Configurations of Nitrogenated Nanocrystalline Diamond Filmsen_US
dc.typepublishedVersion
txstate.documenttypeArticle
dc.identifier.doihttps://doi.org/10.3390/nano12050854
dc.rights.licenseCreative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.
dc.description.departmentIngram School of Engineering


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