DC Field | Value | Language |
---|---|---|
dc.contributor.author | Kim, DH | ko |
dc.contributor.author | Koo, JY | ko |
dc.contributor.author | Kim, Jong Jean | ko |
dc.date.accessioned | 2013-03-03T19:19:27Z | - |
dc.date.available | 2013-03-03T19:19:27Z | - |
dc.date.created | 2012-02-06 | - |
dc.date.created | 2012-02-06 | - |
dc.date.issued | 2003-09 | - |
dc.identifier.citation | PHYSICAL REVIEW B, v.68, pp.S56 - S56 | - |
dc.identifier.issn | 1098-0121 | - |
dc.identifier.uri | http://hdl.handle.net/10203/80089 | - |
dc.description.abstract | Multiwalled carbon nanotubes (MWNT's) on Si(5 5 12) surfaces are demonstrated to be cut only by a negatively biased conducting tip of an atomic force microscope (AFM). By scanning with the AFM tip across a 30-nm-diam MWNT in contact mode, we could cut the MWNT only at a negative tip voltage below a threshold. As the tip-moving speed increased, the magnitude of the threshold voltage was increased. A graphite surface was etched in comparison by the same method. It was also etched only at a negative tip voltage below a threshold. As the magnitude of the bias voltage increased, the etch depth of the graphite surface increased exponentially to reach 7.9 nm, a thickness of 23 atomic layers of graphite, at a bias voltage of -10 V. The etching current from the graphite surface to the negatively biased tip was found to follow the Fowler-Nordheim equation and attributed to field-emission electrons from the negatively biased tip. The etch depth of the graphite surface was also found to follow the bias voltage dependence of the Fowler-Nordheim equation. The graphite etching is thus found to be controlled by the field-emission current so that we may propose a cutting mechanism based on the field-emission current density of the Fowler-Nordheim equation: both the MWNT cutting and graphite etching encounter the same reaction where the activation energy is supplied by electrons that are field emitted from the negatively biased AFM tip. | - |
dc.language | English | - |
dc.publisher | AMERICAN PHYSICAL SOC | - |
dc.subject | SCANNING TUNNELING MICROSCOPE | - |
dc.subject | GRAPHITE SURFACE | - |
dc.subject | OXIDATION | - |
dc.subject | KINETICS | - |
dc.subject | HOLE | - |
dc.title | Cutting of multiwalled carbon nanotubes by a negative voltage tip of an atomic force microscope: A possible mechanism | - |
dc.type | Article | - |
dc.identifier.wosid | 000185829300025 | - |
dc.type.rims | ART | - |
dc.citation.volume | 68 | - |
dc.citation.beginningpage | S56 | - |
dc.citation.endingpage | S56 | - |
dc.citation.publicationname | PHYSICAL REVIEW B | - |
dc.identifier.doi | 10.1103/PhysRevB.68.113406 | - |
dc.contributor.nonIdAuthor | Kim, DH | - |
dc.contributor.nonIdAuthor | Koo, JY | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordPlus | SCANNING TUNNELING MICROSCOPE | - |
dc.subject.keywordPlus | GRAPHITE SURFACE | - |
dc.subject.keywordPlus | OXIDATION | - |
dc.subject.keywordPlus | KINETICS | - |
dc.subject.keywordPlus | HOLE | - |
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