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Dissertation
Optical properties of MXenes
Doctor of Philosophy (Ph.D.), Drexel University
Jun 2024
DOI:
https://doi.org/10.17918/00010703
Abstract
Since the discovery of graphene, 2D nanomaterials have demonstrated great potential in optics and optoelectronics due to their tunable bandgaps and quantum confinement effects, as well as easy processability into thin films. In 2011, Ti₃C₂ was first produced by selective etching of a MAX phase, introducing a new family of 2D materials known as MXenes (transition metal carbides/nitrides) to the world. In contrast to the majority of 2D materials, which are typically semiconductors or insulators, MXenes stand out due to their exceptionally high carrier concentrations, similar to those found in bulk metals, as well as high conductivity, redox-active surfaces, tunable work function, and unique optical properties. In this work, I aimed to advance the fundamental comprehension of the optical properties of MXenes and, in turn, facilitate their tunability across a wide spectrum of optical signals. The focus will be on the utilization of Ti₃C₂T_x as a primary MXene material. I investigated and properly attributed extinction peaks, especially in the visible wavelength range. Additionally, this research explored the interplay between reflection and absorption as a function of the film thickness, to attain dynamic multi-spectral modulation of optical responses encompassing the visible, infrared, and microwave ranges, as well as extend the range of spectro-electrochemical and optical applications of MXenes.
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Details
- Title
- Optical properties of MXenes
- Creators
- Danzhen Zhang
- Contributors
- Yury Gogotsi (Advisor)
- Awarding Institution
- Drexel University
- Degree Awarded
- Doctor of Philosophy (Ph.D.)
- Publisher
- Drexel University; Philadelphia, Pennsylvania
- Number of pages
- xix, 77 pages
- Resource Type
- Dissertation
- Language
- English
- Academic Unit
- Materials (Science and) Engineering (Metallurgical Engineering) [Historical]; College of Engineering (1970-2026); Drexel University
- Other Identifier
- 991021890211704721