Dispersing and Depositing MoSe2 onto Metal, Insulating, and Semiconducting Substrates via Voltage-Controlled Deposition Technique

Author

KALYAN CHAKRAVARTHY BYRISETTY, Louisiana State University and Agricultural and Mechanical CollegeFollow

Semester of Graduation

Fall

Degree

Master of Science in Electrical Engineering (MSEE)

Department

Electrical and Computer Engineering

Document Type

Thesis

Abstract

In today’s world, consumer electronics are getting smaller than ever. These reductions in size are preceded by advancements in electronic materials engineering and related fields. The need for materials that have various properties and are suitable for applications also necessitated research on different materials. Growing research in the applications of graphene led the way to the discovery of materials that have similar properties to graphene. In this way, the transition metal di-chalcogenides (TMDCs) came into use for electrical engineering. Techniques are required to put TMDCs into application, however here we are going to explain the vital focus of our research which is to discuss a successful method of depositing a solution of dispersed MoSe₂ using the voltage-controlled deposition technique. Here we are focusing mainly to find an inexpensive, simple and efficient method to deposit the TMDCs onto substrates.

Initially powdered MoSe₂ is dispersed in n-Methyl Pyrrolidone (NMP), and the dispersed solution is deposited onto different substrates. The different substrates that we used in this project were conducting substrate (Al foil), semi-conducting substrate (Si wafer), and insulating substrates (Glass, SiO₂, PMMA). At first, MoSe₂ was dispersed in NMP using the tip sonication method. Later, by using the voltage-controlled deposition technique the dispersed solution is deposited onto the aforementioned substrates. The final stage of the process is to analyze the deposition of MoSe₂ onto the substrates and etched substrates; we used Scanning Electron Microscopy and Raman Spectroscopy.

Through this research we have examined how MoSe₂ is dispersed well in NMP, and deposited onto bare and etched substrates as may be useful for future device building surface.

Date

10-23-2018

Recommended Citation

BYRISETTY, KALYAN CHAKRAVARTHY, "Dispersing and Depositing MoSe2 onto Metal, Insulating, and Semiconducting Substrates via Voltage-Controlled Deposition Technique" (2018). LSU Master's Theses. 4818.
https://repository.lsu.edu/gradschool_theses/4818

Committee Chair

Theda Daniels Race

DOI

10.31390/gradschool_theses.4818