Electrostatic Analysis of Nanoelectromechanical Systems
Xu, Yang
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https://hdl.handle.net/2142/81152
Description
Title
Electrostatic Analysis of Nanoelectromechanical Systems
Author(s)
Xu, Yang
Issue Date
2009
Doctoral Committee Chair(s)
Aluru, Narayana R.
Department of Study
Electrical and Computer Engineering
Discipline
Electrical and Computer Engineering
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Nanotechnology
Language
eng
Abstract
In addition to the multiscale method, we present an ab initio study of electronic properties of graphene flakes and nanoribbons adsorbed on clean and H-passivated (100) silicon surfaces. The graphene electronic properties are not perturbed by the H-passivated Si substrate. In contrast, the interaction between the clean Si surface and graphene can significantly change the bandstructure of graphene. This is caused by the covalent bonding formed by C and surface Si atoms, which changes the pi-band network of the graphene layer. The dispersion curves and density of states calculations show that the bonded Si-C surface states are highly delocalized and located near the Fermi energy. Adsorption energy indicates that the graphene flakes and nanoribbons are stable on clean Si(100) surfaces.
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