Scanning tunneling microscopy and spectroscopy of tip-induced direct writing of nanometallization in ultra-high vacuum
Huang, Pin-Chiao
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https://hdl.handle.net/2142/108190
Description
Title
Scanning tunneling microscopy and spectroscopy of tip-induced direct writing of nanometallization in ultra-high vacuum
Author(s)
Huang, Pin-Chiao
Issue Date
2020-05-13
Director of Research (if dissertation) or Advisor (if thesis)
Lyding, Joseph W.
Department of Study
Electrical & Computer Eng
Discipline
Electrical & Computer Engr
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
M.S.
Degree Level
Thesis
Keyword(s)
STM
Nanometallization
STS
Abstract
This thesis discusses scanning tunneling microscopy (STM) nanometallization on Si(100):H of HfB2 and MgB2. We first give an introduction to graphene nanoribbons (GNRs) along with STM and the techniques therein. We found that with STM, self-standing nanoscale features including dots, wires, and 3D structures can be made. The steps required in STM nanometallization are reduced compared with traditional lithographic techniques that involve photoresist, etching, and metal deposition.
STM nanometallization affords simple, clean, and fast metal deposition. Ti evaporation is also discussed to prevent physisorption of precursor molecules that promote unwanted and unintended effects. In addition, nanocontacts between a carbon nanotube and HfB2 and MgB2 are presented. STS results confirm that the bandgap energy of the carbon nanotube is unperturbed by nanomanipulation and nanocontacts with metallic HfB2. Finally, ongoing work is discussed and future work is proposed in the last part of this thesis.
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