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Nuclear Micro-Engineering Using Tritium

Liu, Baojun (2011) Nuclear Micro-Engineering Using Tritium. Doctoral Dissertation, University of Pittsburgh. (Unpublished)

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We have been witnessing an unprecedented progress in the arena of MEMS and nanotechnology. By shrinking the size of individual devices and using batch micro-electronics fabrication processes, complex micro/nano-systems with greater functionalities have been integrated on a single chip. The work in this thesis pushes NEMS approach into nuclear engineering. Characterized by long life-time and high power density, radioactive isotopes are appealing power sources for autonomous and very small volume micro-devices. By immobilizing tritium in thin film or on-chip, the multi-functional nature of the nuclear micro-engineering was exploited for a range of applications in betavoltaic, sensing, and on-chip radiators. The objective of this thesis is to explore the miniaturization of these self-powered devices and systems using MEMS and nanotechnology approaches. In this thesis: A contamination-free, CMOS-compatible fabrication technique to integrate monolithically radioactive isotopes on-chip on a micrometer scale has been demonstrated. The application for micro-power generation and sensing are explored. A number of nuclear to electricity energy conversion devices with high-efficiency and excellent longevity have been explored. The embedded on-chip isotope micro-sources have been used to create localized ionization sources for chip-scale gas chromatography sensors and radiators. The extension of micro-engineered radioisotope into MEMS and nanotechnology will generates research opportunities in unattended fields.


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Item Type: University of Pittsburgh ETD
Status: Unpublished
CreatorsEmailPitt UsernameORCID
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Committee ChairChen, Kevin Pkchen@engr.pitt.eduPEC9
Committee CoChairKherani, Nazir
Committee MemberFalk, Joelfalk@pitt.eduFALK
Committee MemberYun, Minheemiy16@pitt.eduMIY16
Committee MemberWang, Qing-Mingqmwang@engr.pitt.eduQIW4
Committee MemberStanchina, William Ewes25@pitt.eduWES25
Date: 30 June 2011
Date Type: Completion
Defense Date: 21 November 2008
Approval Date: 30 June 2011
Submission Date: 25 November 2008
Access Restriction: 5 year -- Restrict access to University of Pittsburgh for a period of 5 years.
Institution: University of Pittsburgh
Schools and Programs: Swanson School of Engineering > Electrical Engineering
Degree: PhD - Doctor of Philosophy
Thesis Type: Doctoral Dissertation
Refereed: Yes
Uncontrolled Keywords: betavoltaic; isotope; nuclear micro-engineering; radiation; battery; tritium
Other ID:, etd-11252008-161031
Date Deposited: 10 Nov 2011 20:06
Last Modified: 15 Nov 2016 13:52


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