DC Field | Value | Language |
---|---|---|
dc.contributor.author | Choi, HC | ko |
dc.contributor.author | Park, J | ko |
dc.contributor.author | Kim, Bongsoo | ko |
dc.date.accessioned | 2013-03-06T19:13:39Z | - |
dc.date.available | 2013-03-06T19:13:39Z | - |
dc.date.created | 2012-02-06 | - |
dc.date.created | 2012-02-06 | - |
dc.date.issued | 2005-03 | - |
dc.identifier.citation | JOURNAL OF PHYSICAL CHEMISTRY B, v.109, no.10, pp.4333 - 4340 | - |
dc.identifier.issn | 1520-6106 | - |
dc.identifier.uri | http://hdl.handle.net/10203/88098 | - |
dc.description.abstract | We investigated the inhomogeneous distribution of concentration and electronic structure of the nitrogen (N) atoms doped in the multiwalled carbon nanotubes (CNTs) by variable-energy X-ray photoelectron spectroscopy (XPS), X-ray absorption near-edge structure, and electron energy-loss spectroscopy. The vertically aligned N-doped CNTs on the substrates were grown via pyrolysis of iron phthalocyanine (FePc), cobalt phthalocyanine (CoPc), and nickel phthalocyanine (NiPc) in the temperature range 750-1000 degrees C. They usually have a bamboo-like structure, and the diameter is in the range of 15-80 nm. As the photon energy of XPS increases from 475 to 1265 eV, the N content increases up to 8 atomic %, indicating a higher N concentration at the inside of nanotubes. We identified three typed N structures: graphite-like, pyridine-like, and molecular N-2. The pyridine-like N structure becomes significant at the inner walls. Molecular N would exist as intercalated forms in the vicinity of hollow inside. The XPS valence band analysis reveals that the pyridine-like N structure induces the metallic behaviors. The CNTs grown using NiPc contain the higher content of pyridine-like structure compared to those grown using FePc and Cope, so they exhibit more metallic properties. | - |
dc.language | English | - |
dc.publisher | AMER CHEMICAL SOC | - |
dc.subject | ELECTRONIC-STRUCTURE | - |
dc.subject | NITROGEN-CONTENT | - |
dc.subject | BINDING-ENERGY | - |
dc.subject | FIELD-EMISSION | - |
dc.subject | CNX NANOTUBES | - |
dc.subject | NITRIDE | - |
dc.subject | PYROLYSIS | - |
dc.subject | GRAPHITE | - |
dc.subject | SPECTRUM | - |
dc.subject | MOLECULES | - |
dc.title | Distribution and structure of N atoms in multiwalled carbon nanotubes using variable-energy X-ray photoelectron spectroscopy | - |
dc.type | Article | - |
dc.identifier.wosid | 000227629700007 | - |
dc.identifier.scopusid | 2-s2.0-15944379283 | - |
dc.type.rims | ART | - |
dc.citation.volume | 109 | - |
dc.citation.issue | 10 | - |
dc.citation.beginningpage | 4333 | - |
dc.citation.endingpage | 4340 | - |
dc.citation.publicationname | JOURNAL OF PHYSICAL CHEMISTRY B | - |
dc.identifier.doi | 10.1021/jp0453109 | - |
dc.contributor.localauthor | Kim, Bongsoo | - |
dc.contributor.nonIdAuthor | Choi, HC | - |
dc.contributor.nonIdAuthor | Park, J | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordPlus | ELECTRONIC-STRUCTURE | - |
dc.subject.keywordPlus | NITROGEN-CONTENT | - |
dc.subject.keywordPlus | BINDING-ENERGY | - |
dc.subject.keywordPlus | FIELD-EMISSION | - |
dc.subject.keywordPlus | CNX NANOTUBES | - |
dc.subject.keywordPlus | NITRIDE | - |
dc.subject.keywordPlus | PYROLYSIS | - |
dc.subject.keywordPlus | GRAPHITE | - |
dc.subject.keywordPlus | SPECTRUM | - |
dc.subject.keywordPlus | GROWTH | - |
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