Raman and electron microscopy analysis of carbon nanotubes exposed to high power laser irradiance

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dc.contributorVirginia Tech. Engineering Science and Mechanics Departmenten
dc.contributorVirginia Tech. Department of Mechanical Engineeringen
dc.contributorVirginia Tech. Institute for Critical Technology and Applied Science (ICTAS)en
dc.contributorUniversity of Colorado, Boulder. Department of Mechanical Engineeringen
dc.contributorNational Institute of Standards and Technology (U.S.)en
dc.contributorNational Renewable Energy Laboratory (U.S.)en
dc.contributor.authorRamadurai, Krishnaen
dc.contributor.authorCromer, Christopher L.en
dc.contributor.authorDillon, Anne C.en
dc.contributor.authorMahajan, Roop L.en
dc.contributor.authorLehman, John H.en
dc.contributor.departmentBiomedical Engineering and Mechanicsen
dc.date.accessed2015-04-24en
dc.date.accessioned2015-06-01T16:10:46Zen
dc.date.available2015-06-01T16:10:46Zen
dc.date.issued2009-05-01en
dc.description.abstractHigh power laser radiometry requires efficient and damage-resistant detectors. The current study explores the evolving nature of carbon nanotube coatings for such detectors upon their exposure to incrementally increasing laser power levels. Electron microscopy images along with the D-band to G-band intensity ratios from the Raman spectra from eight irradiance levels are used to evaluate changes before and after the exposure. Electron microscopy images of the exposed multiwalled carbon nanotubes revealed the formation of intermittent pockets of moundlike structures at high power densities exceeding 11 kW/cm(2). Raman spectroscopy measurements also demonstrated higher values for the ratio of the D-band intensity to that of the G-band, suggesting the possible transformation of nanotubes into structurally different forms of carbon. Exposure to a sample of single-walled nanotubes did not demonstrate the evolution of structural changes, which could be due in part to the higher irradiance levels relative to the damage threshold, employed in the experiment. (C) 2009 American Institute of Physics. [DOI: 10.1063/1.3116165]en
dc.format.extent7 pagesen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationRamadurai, Krishna, Cromer, Christopher L., Dillon, Anne C., Mahajan, Roop L., Lehman, John H. (2009). Raman and electron microscopy analysis of carbon nanotubes exposed to high power laser irradiance. Journal of Applied Physics, 105(9). doi: 10.1063/1.3116165en
dc.identifier.doihttps://doi.org/10.1063/1.3116165en
dc.identifier.issn0021-8979en
dc.identifier.urihttp://hdl.handle.net/10919/52878en
dc.identifier.urlhttp://scitation.aip.org/content/aip/journal/jap/105/9/10.1063/1.3116165en
dc.language.isoen_USen
dc.publisherAmerican Institute of Physicsen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectCarbon nanotubesen
dc.subjectIrradianceen
dc.subjectCarbonen
dc.subjectMetallic coatingsen
dc.subjectRaman spectraen
dc.titleRaman and electron microscopy analysis of carbon nanotubes exposed to high power laser irradianceen
dc.title.serialJournal of Applied Physicsen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

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