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Investigation into Vapor-Liquid-Solid Growth of Beta-Gallium Oxide Nanowires and Methods for Device Implementation

Erickson, John (2017) Investigation into Vapor-Liquid-Solid Growth of Beta-Gallium Oxide Nanowires and Methods for Device Implementation. Master's Thesis, University of Pittsburgh. (Unpublished)

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Gallium oxide (Ga2O3) has recently gained interest in the scientific community due to its large semiconductor energy bandgap and other advantageous electronic material properties. With the rise of cost effective manufacturing capabilities for single crystal native substrates, along with improved capabilities for producing low-dimensional structures, Ga2O3 has the potential to offer significant advantages in select facets of the electronics industry. High quality, single crystal Ga2O3 nanowires can easily be grown through a simple vapor-liquid-solid (VLS) mechanism. Since it was first proposed, the VLS growth mechanism has been extensively used for any unidirectional growth with a liquid mediating phase and precursors supplied from a vapor phase. This work investigates the VLS growth of Ga2O3 nanowires at varying temperatures and pressures and categorizes the resulting nanowires. In addition, a method for selectively patterned deposition and alignment of nanowires called combing is demonstrated for the as-grown Ga2O3 nanowires. Traditional methods for nanowire deposition use arrays of pre-patterned electrodes and disperse the nanowires among them, resulting in a few working devices. Nanowire combing can pre-pattern selected areas for nanowire deposition, increasing the reliability and yield of the fabrication process and is readily adaptable to existing semiconductor fabrication technologies.


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Item Type: University of Pittsburgh ETD
Status: Unpublished
CreatorsEmailPitt UsernameORCID
Erickson, Johnjre31@pitt.edujre31
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Committee ChairStanchina, Williamwes25@pitt.eduwes25
Committee MemberYun, Minheemiy16@pitt.edumiy16
Xiong, Fengf.xiong@pitt.eduf.xiong
Date: 25 September 2017
Date Type: Publication
Defense Date: 13 July 2017
Approval Date: 25 September 2017
Submission Date: 18 July 2017
Access Restriction: No restriction; Release the ETD for access worldwide immediately.
Number of Pages: 83
Institution: University of Pittsburgh
Schools and Programs: Swanson School of Engineering > Electrical and Computer Engineering
Degree: MS - Master of Science
Thesis Type: Master's Thesis
Refereed: Yes
Uncontrolled Keywords: Vapor-Liquid-Solid, VLS, Gallium Oxide, Ga2O3, Nanowires, Nanocombing
Date Deposited: 25 Sep 2018 05:00
Last Modified: 25 Sep 2018 05:00


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