Optical and electrical breakdown of carbon allotropes : mechanisms and applications for data storage
As Moore’s law is expected to fail soon, researchers are trying to develop new ways to store data both electrically and optically. Here, we study the structural and morphological transformations occurring when carbon allotropes are subjected to large optical and electrical power densities. We show t...
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| Format: | Thesis |
| Language: | English |
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2016
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| Online Access: | https://hdl.handle.net/10356/68465 |
| _version_ | 1826123148369592320 |
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| author | Loisel, Loic |
| author2 | Bernard Drevillon |
| author_facet | Bernard Drevillon Loisel, Loic |
| author_sort | Loisel, Loic |
| collection | NTU |
| description | As Moore’s law is expected to fail soon, researchers are trying to develop new ways to store data both electrically and optically. Here, we study the structural and morphological transformations occurring when carbon allotropes are subjected to large optical and electrical power densities. We show that textured carbon thin films undergo either graphitization, amorphization or matter loss when annealed by a continuous-wave laser (annealing duration several minutes). We then use 5 ns laser pulses to induce reversible phase changes (graphitization and amorphization) to similar carbon thin films, hence opening the way toward fast optically controlled carbon phase change memories. To improve the cycling ability, we provide a model explaining both the phase changes and the observed degradations. Finally, we develop planar electro-mechanical memories based on graphene, in which a nano-sized gap is created via electrical breakdown. Large resistance changes are controlled by reversible movements of two graphene flakes surrounding the gap, hence opening and closing the electrical contact. |
| first_indexed | 2024-10-01T05:59:55Z |
| format | Thesis |
| id | ntu-10356/68465 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:59:55Z |
| publishDate | 2016 |
| record_format | dspace |
| spelling | ntu-10356/684652023-07-04T16:30:49Z Optical and electrical breakdown of carbon allotropes : mechanisms and applications for data storage Loisel, Loic Bernard Drevillon Costel-Sorin Cojocaru Tay Beng Kang School of Electrical and Electronic Engineering DRNTU::Engineering::Electrical and electronic engineering As Moore’s law is expected to fail soon, researchers are trying to develop new ways to store data both electrically and optically. Here, we study the structural and morphological transformations occurring when carbon allotropes are subjected to large optical and electrical power densities. We show that textured carbon thin films undergo either graphitization, amorphization or matter loss when annealed by a continuous-wave laser (annealing duration several minutes). We then use 5 ns laser pulses to induce reversible phase changes (graphitization and amorphization) to similar carbon thin films, hence opening the way toward fast optically controlled carbon phase change memories. To improve the cycling ability, we provide a model explaining both the phase changes and the observed degradations. Finally, we develop planar electro-mechanical memories based on graphene, in which a nano-sized gap is created via electrical breakdown. Large resistance changes are controlled by reversible movements of two graphene flakes surrounding the gap, hence opening and closing the electrical contact. DOCTOR OF PHILOSOPHY (EEE) 2016-05-26T03:40:11Z 2016-05-26T03:40:11Z 2016 Thesis Loisel, L. (2016). Optical and electrical breakdown of carbon allotropes : mechanisms and applications for data storage. Doctoral thesis, Nanyang Technological University, Singapore. https://hdl.handle.net/10356/68465 10.32657/10356/68465 en 237 p. application/pdf |
| spellingShingle | DRNTU::Engineering::Electrical and electronic engineering Loisel, Loic Optical and electrical breakdown of carbon allotropes : mechanisms and applications for data storage |
| title | Optical and electrical breakdown of carbon allotropes : mechanisms and applications for data storage |
| title_full | Optical and electrical breakdown of carbon allotropes : mechanisms and applications for data storage |
| title_fullStr | Optical and electrical breakdown of carbon allotropes : mechanisms and applications for data storage |
| title_full_unstemmed | Optical and electrical breakdown of carbon allotropes : mechanisms and applications for data storage |
| title_short | Optical and electrical breakdown of carbon allotropes : mechanisms and applications for data storage |
| title_sort | optical and electrical breakdown of carbon allotropes mechanisms and applications for data storage |
| topic | DRNTU::Engineering::Electrical and electronic engineering |
| url | https://hdl.handle.net/10356/68465 |
| work_keys_str_mv | AT loiselloic opticalandelectricalbreakdownofcarbonallotropesmechanismsandapplicationsfordatastorage |