2026-09-20T17:19:47Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/29478 2023-07-10 col_2142_5131 col_2142_14787 com_2142_5130 com_2142_9630 com_2142_234

Made available in DSpace on 2012-02-01T00:48:26Z (GMT). No. of bitstreams: 3 Lee_HoWon.pdf: 4405248 bytes, checksum: 41d914103a408ca170c48385421652fa (MD5) license.txt: 4054 bytes, checksum: 2175a1ca06310f92256240bfeceb9bbb (MD5) Lee_Ho Won.docx: 54614972 bytes, checksum: 71fa7adf3cbed8532a5c311b2df8cb6b (MD5) Fang, Nicholas X. Fang, Nicholas X. Rogers, John A. Aluru, Narayana R. Bhargava, Rohit Lee, Ho Won 2012-02-01T00:48:26Z 2014-02-01T11:00:29Z 2012-02-01T00:48:26Z 2011-12 Active materials that can adapt to dynamic environment have attracted growing attention in various fields of science and engineering because they hold great potential in development of autonomous and multifunctional devices and systems. Hydrogels, which swell and contract in response to a wide range of external stimuli, have been studied extensively as one of the most promising functional materials. Unique properties and advantages of these materials, however, have not been fully explored and successfully implemented at device level primarily because manufacturing and material process of this new class of materials still rely on conventional fabrication methods. This study presents development and application of a novel three-dimensional digital microfabrication technology, projection micro-stereolithography (PμSL), to engineer soft functional materials into reconfigurable active micro devices. Generation of complex motion is demonstrated by appropriate design of embedded microvascular network for direct solvent delivery in the polymeric device. Bio-inspired design principles of harnessing mechanical instability have been applied to improve actuation speed of soft devices and to create spontaneous structural pattern transformation. Fundamental mechanics on solvent diffusion kinetics and associated mechanical behavior of polymer is also investigated. Item withdrawn by Mark Zulauf (zulauf@illinois.edu) on 2011-10-05T21:08:15Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 2 Lee_Ho Won.docx: 54616868 bytes, checksum: d88dca2decdd79c506275954de38763f (MD5) Lee_Ho Won.pdf: 4409138 bytes, checksum: 92800ca9d809eca95b6c0d2e8131c108 (MD5) Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by William Ingram (wingram2@illinois.edu) on 2012-02-01T00:50:40Z Item is restricted until 2014-02-01T00:50:07Z Item reinstated by Sarah Shreeves (sshreeve@illinois.edu) on 2014-02-01T11:00:29Z Item was in collections: Graduate Theses and Dissertations at Illinois (ID: 204) Dissertations and Theses - Mechanical Science and Engineering (ID: 675) No. of bitstreams: 4 Lee_HoWon.pdf: 4405248 bytes, checksum: 41d914103a408ca170c48385421652fa (MD5) license.txt: 4054 bytes, checksum: 2175a1ca06310f92256240bfeceb9bbb (MD5) Lee_Ho Won.docx: 54614972 bytes, checksum: 71fa7adf3cbed8532a5c311b2df8cb6b (MD5) Lee_HoWon.pdf.txt: 205439 bytes, checksum: c07087c550495ddb7742115bd14d3425 (MD5) Item released from any restrictions by Sarah Shreeves (sshreeve@illinois.edu) on 2014-02-01T11:00:29Z http://hdl.handle.net/2142/29478 en Copyright 2011 Ho Won Lee manufacturing stereolithography hydrogel soft active material actuator active micro device elastic instability buckling Case II diffusion Three-dimensional micro fabrication of active micro devices using soft functional materials Mechanical Sci & Engineering 1917 Mechanical Engineering 0133 University of Illinois at Urbana-Champaign Dissertation Ph.D. PHD:Mechanical Enginerng -UIUC 10KS0133PHD