Electrothermal controlled-exposure technology
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2006.
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| Format: | Thesis |
| Language: | eng |
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Massachusetts Institute of Technology
2007
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| Online Access: | http://hdl.handle.net/1721.1/37355 |
| _version_ | 1811098339745202176 |
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| author | Maloney, John Mapes |
| author2 | Krystyn J. van Vliet. |
| author_facet | Krystyn J. van Vliet. Maloney, John Mapes |
| author_sort | Maloney, John Mapes |
| collection | MIT |
| description | Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2006. |
| first_indexed | 2024-09-23T17:13:31Z |
| format | Thesis |
| id | mit-1721.1/37355 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T17:13:31Z |
| publishDate | 2007 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/373552019-04-12T09:03:43Z Electrothermal controlled-exposure technology Maloney, John Mapes Krystyn J. van Vliet. Massachusetts Institute of Technology. Dept. of Materials Science and Engineering. Massachusetts Institute of Technology. Dept. of Materials Science and Engineering. Materials Science and Engineering. Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2006. This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections. Includes bibliographical references (p. 73-79). A technology is presented for exposing the contents of microfabricated cavities in a substrate. These contents are hermetically sealed until exposure is triggered by an electronic signal. The exposure mechanism uses electrothermal heating to rupture a metal membrane at one end of the cavity. The device's capability for storing a variety of contents and exposing them on demand makes it well suited for periodic exposure of new sensors as old ones degrade. Two commercialization possibilities are investigated: biowarfare agent detection and in vivo glucose sensing. Both applications employ sensing mechanisms that can be miniaturized and packaged in an array. These sensors are susceptible to fouling or degradation over time from environmental factors. The controlled-exposure technology addresses this problem by periodically exposing fresh sensors. The two applications are thought to be especially favorable markets because of the need for reliable, continuous sensing. The engineering aspects of the technology are investigated by identifying key material properties for each component of the device. (cont.) The key properties for the substrate material are suggested to be its vapor permeability and suitability for cavity formation. The most important properties of the membrane are its electrical requirements (the current and voltage required to expose or "activate" the device), its strength and hermeticity, and its stability in the intended working environment. Design and materials selection approaches for optimizing these properties are presented. by John Mapes Maloney. M.Eng. 2007-05-16T16:10:51Z 2007-05-16T16:10:51Z 2006 2006 Thesis http://hdl.handle.net/1721.1/37355 122903938 eng M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582 79 p. application/pdf Massachusetts Institute of Technology |
| spellingShingle | Materials Science and Engineering. Maloney, John Mapes Electrothermal controlled-exposure technology |
| title | Electrothermal controlled-exposure technology |
| title_full | Electrothermal controlled-exposure technology |
| title_fullStr | Electrothermal controlled-exposure technology |
| title_full_unstemmed | Electrothermal controlled-exposure technology |
| title_short | Electrothermal controlled-exposure technology |
| title_sort | electrothermal controlled exposure technology |
| topic | Materials Science and Engineering. |
| url | http://hdl.handle.net/1721.1/37355 |
| work_keys_str_mv | AT maloneyjohnmapes electrothermalcontrolledexposuretechnology |