Understanding and manipulating charges surrounding carbon nanotubes : a step towards high-performance computing with carbone nanotube transistors
Abstract/Contents
- Abstract
- The biggest obstacle in introducing new nanomaterials is that innovative techniques and solutions are required to overcome the various challenges. In particular, conventional understandings based on bulk channel materials (i.e. Si) are often not applicable to carbon nanotubes (CNTs) due to their ultrathin (1~2 nm) one-dimensional structure. Additionally, the large surface-to-volume ratio from the one-dimensional structure makes CNTs greatly susceptible to nearby charges. In this dissertation, I will document the new knowledge obtained for understanding the physics behind -- and even utilize -- the charges surrounding the CNT with a view toward high-performance computing using carbon nanotube field effect transistors (CNFETs). In particular, this thesis presents a study on the following topics in CNFETs: Hysteresis -- A pulse-based measurement technique combined with a physics-based model is developed to characterize traps which affect hysteresis in CNFETs. With the insight gained from this work, hysteresis-free CNFETs are fabricated by minimizing the effect of traps onto the CNTs. Subthreshold Swing -- Hysteresis-free curves are an important, but often neglected, prerequisite to measuring the subthreshold swing (SS). By continuing our studies using hysteresis-free CNFETs, the source of large SS is identified. Doping -- Through a charge transfer doping mechanism, molybdenum oxide (MoOx) heavily dopes the CNTs, but the effect is unstable over time. The gradual change in material properties of MoOx and a method to stabilize the doping strength are investigated
Description
| Type of resource | text |
|---|---|
| Form | electronic resource; remote; computer; online resource |
| Extent | 1 online resource |
| Place | California |
| Place | [Stanford, California] |
| Publisher | [Stanford University] |
| Copyright date | 2020; ©2020 |
| Publication date | 2020; 2020 |
| Issuance | monographic |
| Language | English |
Creators/Contributors
| Author | Park, Rebecca |
|---|---|
| Degree supervisor | Wong, Hon-Sum Philip, 1959- |
| Thesis advisor | Wong, Hon-Sum Philip, 1959- |
| Thesis advisor | Mitra, Subhasish |
| Thesis advisor | Saraswat, Krishna |
| Degree committee member | Mitra, Subhasish |
| Degree committee member | Saraswat, Krishna |
| Associated with | Stanford University, Department of Electrical Engineering. |
Subjects
| Genre | Theses |
|---|---|
| Genre | Text |
Bibliographic information
| Statement of responsibility | Rebecca Park |
|---|---|
| Note | Submitted to the Department of Electrical Engineering |
| Thesis | Thesis Ph.D. Stanford University 2020 |
| Location | electronic resource |
Access conditions
- Copyright
- © 2020 by Rebecca Park
- License
- This work is licensed under a Creative Commons Attribution Non Commercial 3.0 Unported license (CC BY-NC).
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