2026-09-21T00:28:06Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/99188 2023-07-11 col_2142_5131 col_2142_14789 com_2142_5130 com_2142_14788 com_2142_8903

Rogers, John A. Rogers, John A. Murphy, Catherine J. Girolami, Gregory S. Nuzzo, Ralph G. Lee, Yoon Kyeung 2018-03-13T15:21:04Z 2018-03-13T15:21:04Z 2020-03-14T09:15:08Z 2017-10-17 2017-12 Recent advances in materials, mechanics design and microfabrication technologies are beginning to establish the foundations for electronics of thin layouts that conformally interface with the human organs including the brain, the heart and epidermis. Certain of the thin materials including silicon and various metal oxide membranes have been found to completely degrade in water, which have substantiated the concept of bioresorbable electronics systems. The current study presents four independent topics of research on materials and device architecture related to this unconventional format of electronics. The first work introduces chemical sensing systems on thin elastomeric substrates with open cellular designs to prevent artificial accumulation or depletion of chemicals of interest. The materials, designs and integration strategies provide a framework for chemical sensors capable of monitoring biomarkers in extracellular fluid, with soft physical form factors to facilitate bio-integration. The next chapters investigate chemical stabilities of thin nanomembranes of silicon and thermally grown silicon dioxide in biofluids for their provisioned importance as a thin film water barrier in implantable flexible electronics. The different materials dissolution rates in silicon and its oxide provide materials design options in device construction depending on the device target lifetimes. The last chapter describes a conductive ink formulation that exploits electrochemical sintering of Zn microparticles in aqueous solutions at room temperature, with relevance to emerging classes of biologically and environmentally degradable electronic devices. The resulting electrochemistry establishes the basis for a remarkably simple procedure for printing highly conductive features of degradable materials at ambient conditions over large areas. Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2019-12-01 The student, Yoon Kyeung Lee, accepted the attached license on 2017-10-12 at 17:02. The student, Yoon Kyeung Lee, submitted this Dissertation for approval on 2017-10-12 at 17:12. This Dissertation was approved for publication on 2017-10-17 at 13:35. DSpace SAF Submission Ingestion Package generated from Vireo submission #11684 on 2018-03-13 at 09:55:22 Made available in DSpace on 2018-03-13T15:21:04Z (GMT). No. of bitstreams: 2 LEE-DISSERTATION-2017.pdf: 3969472 bytes, checksum: dc3d03d736c4f80efc398d27eecd44f8 (MD5) LICENSE.txt: 4212 bytes, checksum: 53bbcbfa30a2b2a3d20465f22aef81b0 (MD5) Previous issue date: 2017-10-17 Embargo set by: Seth Robbins for item 105150 Lift date: 2020-03-13T15:21:19Z Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD system Embargo set by: Seth Robbins for item 105150 Lift date: 2020-03-13T15:25:40Z Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD system Embargo set by: Seth Robbins for item 105150 Lift date: 2020-03-13T15:28:52Z Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD system U of I Only Restriction Lifted for Item 105150 on 2020-03-14T09:15:08Z. application/pdf http://hdl.handle.net/2142/99188 en Copyright 2017 Yoon Kyeung Lee Flexible electronics Bioresorbable electronics Materials for bioimplantable / bioresorbable electronics text text Chemistry Chemistry University of Illinois at Urbana-Champaign Dissertation Ph.D.