2026-09-20T05:08:25Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/46803 2023-07-11 col_2142_5131 col_2142_11615 com_2142_5130 com_2142_9130 com_2142_8903

Seebauer, Edmund G. Pangan-Okimoto, Kristine 2014-01-16T18:16:33Z 2014-01-16T18:16:33Z 2016-01-16T11:01:23Z 2013-12 2014-01-16T18:16:33Z 2013-12 Recent work in this laboratory has found that an atomically clean (110) surface on rutile titania allows for facile injection of a mobile oxygen intermediate other than the doubly-charged oxygen vacancy. Characteristic exponential tail profiles coupled with the observation of a positive oxygen partial pressure dependence on isotopic oxygen diffusion in rutile suggests that the observed mobile oxygen intermediate is a negatively charged oxygen interstitial (Oix-). Two modeling techniques are utilized to kinetically simulate the concentration profiles observed. Both models predict bulk isotopic oxygen diffusion that is highly dependent on the ability of the surface to inject and annihilate oxygen interstitials into the bulk. Additionally, modeling of the experimental profiles suggest that oxygen interstitials have equilibrium concentrations one to two orders of magnitude larger than that predicted by quantum calculations. Methods to effectively control the equilibrium concentration of oxygen interstitials via surface manipulation are suggested that may be utilized to effectively p-dope rutile titania. Item withdrawn by Laura Spradlin (lspradl2@illinois.edu) on 2013-12-13T15:51:52Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 1 Panganokimoto_Kristine.pdf: 2712322 bytes, checksum: e43b12e9334d7d3ecb803bbeb4af5141 (MD5) Made available in DSpace on 2014-01-16T18:16:33Z (GMT). No. of bitstreams: 2 Kristine_Pangan-Okimoto.pdf: 2714071 bytes, checksum: ae41c072a24e37d95888560405305895 (MD5) license.txt: 4073 bytes, checksum: 34b57206075a37ee6ce5ec208a49be55 (MD5) Restriction data tranferred 2014-07-01T11:35:32-05:00 Original Data Group with Access UIUC Users [automated] Release Date: 2016-01-16 12:19:34 UTC Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD system Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Seth Robbins (robbins.sd@gmail.com) on 2014-01-16T18:19:37Z Item is restricted until 2016-01-16T18:19:34Z U of I Only Restriction Lifted for Item 46822 on 2016-01-16T11:01:23Z. http://hdl.handle.net/2142/46803 en Copyright 2013 Kristine Pangan-Okimoto Defect Engineering Titanium Dioxide (TiO2) Semiconductors Oxygen self-diffusion via a mobile intermediate species in rutile titania text Chemical and Biomolecular Engineering 1687 Chemical Engineering 0300 University of Illinois at Urbana-Champaign Thesis M.S. MS:Chemical Engineering -UIUC 10KS0300MS