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dc.contributor.authorDahl, Erik Monroeen_US
dc.date.accessioned2014-11-15T07:00:41Z
dc.date.available2014-11-15T07:00:41Z
dc.date.issued2013-05-23en_US
dc.identifier.othervt_gsexam:1145en_US
dc.identifier.urihttp://hdl.handle.net/10919/50856
dc.description.abstractThe unique electronic properties of single-walled carbon nanotubes (SWNTs) have sparked interest for using such nanomaterials in the nuclear industry and within radiation detection devices. To explore the application of SWNTs in the nuclear industry, it was first deemed necessary to study how SWNTs respond to the two main types of radiation occurring in nuclear environments, neutrons and gamma rays.

SWNT samples were irradiated in the High Flux Isotope Reactor (HFIR) at Oak Ridge National Laboratory with neutrons and gamma rays at incremented lengths of time allowing for multiple fluence intensities to be received by the samples. After irradiation, Raman spectroscopy was used to monitor the damage incurred from neutron and gamma irradiation. It was found that disorder within the SWNT lattice network increased with increasing irradiation intensity. The results indicated that the gamma irradiation was causing the majority of the damage with little to no damage caused by the neutron irradiation. Further investigation showed that the non-linearity of the disorder increase with increasing irradiation intensity was typical of sample doping instead of the expected particle impacts. It was concluded that the gamma irradiation was generating dopants within the SWNTs by the process of water radiolysis. Water vapor trapped between the SWNT film layer and the substrate that the film layer was placed on was identified as the source of the sample dopants. Although unexpected, the results from this experiment have provided insight into a potential gamma radiation detection technique using SWNTs that has never been considered until now.
en_US
dc.format.mediumETDen_US
dc.publisherVirginia Techen_US
dc.rightsThis Item is protected by copyright and/or related rights. Some uses of this Item may be deemed fair and permitted by law even without permission from the rights holder(s), or the rights holder(s) may have licensed the work for use under certain conditions. For other uses you need to obtain permission from the rights holder(s).en_US
dc.subjectCarbon nanotubes; Neutron Irradiation; Gamma Irradiation; Raman spectroscopyen_US
dc.titleSingle-Walled Carbon Nanotube Response to Neutron and Gamma Irradiationen_US
dc.typeThesisen_US
dc.contributor.departmentMechanical Engineeringen_US
dc.description.degreeMaster of Scienceen_US
thesis.degree.nameMaster of Scienceen_US
thesis.degree.levelmastersen_US
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen_US
thesis.degree.disciplineMechanical Engineeringen_US
dc.contributor.committeechairPierson, Mark Alanen_US
dc.contributor.committeememberHuxtable, Scott T.en_US
dc.contributor.committeememberAl-Haik, Marwanen_US


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