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PhD dissertation Zhonghang Ji.pdf (4.4 MB)

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Exploring Two-Dimensional Graphene and Silicene in Digital and RF Applications

Ji, Zhonghang
http://rave.ohiolink.edu/etdc/view?acc_num=wright1576345750912449

Abstract Details

2019, Doctor of Philosophy (PhD), Wright State University, Electrical Engineering.
Since the discovery of graphene, two-dimensional (2D) materials have attracted intensive interests in the past 15 years and there has been a growing interest in exploring new materials beyond graphene, such as silicene, germanene, etc. Numerous papers have been published to demonstrate their extraordinary electronic, optical, biological, and thermal properties which render broad applications in various fields. However, the absence of band gap in graphene and silicene prohibits their uses in digital applications. This dissertation reviews recent progress on band gap opening based on mono- and bi- layer silicene and presents a new silicon atomic structure which exhibits a 0.17 eV bandgap. In addition, a feasible approach was first demonstrated and proposed to potentially achieve the industrial-scale production of our simulated structure. More broadly, this approach suggests a new path for growing any materials on different substrates without forming chemical bond between the interaction layers. Although the gapless character of graphene prohibits its use in digital applications, it is not a concern for Radio Frequency (RF) applications. This work also investigated the impact of defects to RF electronic properties of the 2D materials. Chemical vapor deposited Graphene (CVDG) was selected as an example and was measured using scanning microwave microscopy (SMM). In order to analyze the result, a numerical model of SMM was first developed using Electromagnetic Professional (EMPro). From the results, both conductivity and permittivity of defective graphene exhibit the frequency-dependency properties. Additionally, the model we proposed in this work can precisely characterize the correlation between conductivity and permittivity of any materials in nanoscale at RF level.
Yan Zhuang, Ph.D. (Advisor)
Henry Chen, Ph.D. (Committee Member)
Lok C. Lew Yan Voon, Ph.D. (Committee Member)
Marian K. Kazimierczuk, Ph.D. (Committee Member)
Saiyu Ren, Ph.D. (Committee Member)
154 p.
Electrical Engineering; Electromagnetics; Materials Science; Physics
2D materials; Graphene; Silicene; band gap; SMM; nanomaterials; substrates

Recommended Citations

Citations

  • Ji, Z. (2019). Exploring Two-Dimensional Graphene and Silicene in Digital and RF Applications [Doctoral dissertation, Wright State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=wright1576345750912449

    APA Style (7th edition)

  • Ji, Zhonghang. Exploring Two-Dimensional Graphene and Silicene in Digital and RF Applications. 2019. Wright State University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=wright1576345750912449.

    MLA Style (8th edition)

  • Ji, Zhonghang. "Exploring Two-Dimensional Graphene and Silicene in Digital and RF Applications." Doctoral dissertation, Wright State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=wright1576345750912449

    Chicago Manual of Style (17th edition)

wright1576345750912449
333
© 2019, some rights reserved.Creative Commons License Exploring Two-Dimensional Graphene and Silicene in Digital and RF Applications by Zhonghang Ji is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License. Based on a work at etd.ohiolink.edu.
This open access ETD is published by Wright State University and OhioLINK.