Electronic band structure of carbon nanomaterials
<p>This thesis reports the study of electronic structures for single-walled carbon nanotubes, single layer graphene and thin graphite. A brief introduction is given in Chapter 1 for the geometric and electronic structures of the materials studied while a review for the theory and experimental...
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| Format: | Thesis |
| Language: | English |
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2009
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| _version_ | 1797070048693583872 |
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| author | Chuang, KC |
| author2 | Nicholas, RJ |
| author_facet | Nicholas, RJ Chuang, KC |
| author_sort | Chuang, KC |
| collection | OXFORD |
| description | <p>This thesis reports the study of electronic structures for single-walled carbon nanotubes, single layer graphene and thin graphite. A brief introduction is given in Chapter 1 for the geometric and electronic structures of the materials studied while a review for the theory and experimental results relevant to this thesis is given in Chapter 2.</p> <p>The effects of hydrostatic pressure on surfactant-wrapped-single walled carbon nanotubes are studied in Chapter 3 by using photoluminscence and photoluminscence excitation mapping. It is found that the changes to the optical properties can be explained by the compression in carbon-carbon bonds, an effective uniaxial strain exerted on the nanotubes and changes in the surrounding environment leading to changes in the many-body interactions experienced by the nanotubes. Chapter 4 reports the study of cross-polarized photoluminescence of nanotubes isolated by conjugated polymers dispersed in solvents. The effects of Coulomb interactions on the optical bandgaps of the nanotubes are discussed here.</p> <p>Chapter 5 reports Cyclotron resonances studies of graphene monolayers. It is found that a significant asymmetry exists between the electron and hole band structures near the Dirac point, and the asymmetry is bigger than that is expected in a simple tight-binding model. Chapter 6 reports a magnetoabsorption study of the electronic structures near the <em>K</em>- and <em>H</em>- points. It is found that the transitions are not describe well by the conventional Slonczewski-Weiss-McClure model, but can be described instead with a simplified asymmetric effective bilayer model.</p> |
| first_indexed | 2024-03-06T22:33:27Z |
| format | Thesis |
| id | oxford-uuid:590ccfa7-2737-40c4-9a9c-ddb1b710cfef |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T22:33:27Z |
| publishDate | 2009 |
| record_format | dspace |
| spelling | oxford-uuid:590ccfa7-2737-40c4-9a9c-ddb1b710cfef2022-03-26T17:07:30ZElectronic band structure of carbon nanomaterialsThesishttp://purl.org/coar/resource_type/c_db06uuid:590ccfa7-2737-40c4-9a9c-ddb1b710cfefPhysicsCondensed matter theoryPhysical SciencesEnglishOxford University Research Archive - Valet2009Chuang, KCNicholas, RJ<p>This thesis reports the study of electronic structures for single-walled carbon nanotubes, single layer graphene and thin graphite. A brief introduction is given in Chapter 1 for the geometric and electronic structures of the materials studied while a review for the theory and experimental results relevant to this thesis is given in Chapter 2.</p> <p>The effects of hydrostatic pressure on surfactant-wrapped-single walled carbon nanotubes are studied in Chapter 3 by using photoluminscence and photoluminscence excitation mapping. It is found that the changes to the optical properties can be explained by the compression in carbon-carbon bonds, an effective uniaxial strain exerted on the nanotubes and changes in the surrounding environment leading to changes in the many-body interactions experienced by the nanotubes. Chapter 4 reports the study of cross-polarized photoluminescence of nanotubes isolated by conjugated polymers dispersed in solvents. The effects of Coulomb interactions on the optical bandgaps of the nanotubes are discussed here.</p> <p>Chapter 5 reports Cyclotron resonances studies of graphene monolayers. It is found that a significant asymmetry exists between the electron and hole band structures near the Dirac point, and the asymmetry is bigger than that is expected in a simple tight-binding model. Chapter 6 reports a magnetoabsorption study of the electronic structures near the <em>K</em>- and <em>H</em>- points. It is found that the transitions are not describe well by the conventional Slonczewski-Weiss-McClure model, but can be described instead with a simplified asymmetric effective bilayer model.</p> |
| spellingShingle | Physics Condensed matter theory Physical Sciences Chuang, KC Electronic band structure of carbon nanomaterials |
| title | Electronic band structure of carbon nanomaterials |
| title_full | Electronic band structure of carbon nanomaterials |
| title_fullStr | Electronic band structure of carbon nanomaterials |
| title_full_unstemmed | Electronic band structure of carbon nanomaterials |
| title_short | Electronic band structure of carbon nanomaterials |
| title_sort | electronic band structure of carbon nanomaterials |
| topic | Physics Condensed matter theory Physical Sciences |
| work_keys_str_mv | AT chuangkc electronicbandstructureofcarbonnanomaterials |