2026-09-23T09:21:55Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/42179 2023-07-11 col_2142_5131 col_2142_11615 com_2142_5130 com_2142_9130 com_2142_8903

Made available in DSpace on 2013-02-03T19:18:31Z (GMT). No. of bitstreams: 2 Byung-Chan_Choi.pdf: 1830922 bytes, checksum: 742937613b4c5a0c78c70ef10e902f1a (MD5) license.txt: 4064 bytes, checksum: 53cdea897122dbf51517ac552aeb19e9 (MD5) Restriction data tranferred 2014-07-01T11:12:04-05:00 Original Data Group with Access UIUC Users [automated] Release Date: 2015-02-03 13:18:53 UTC Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD system Leckband, Deborah E. Choi, Byung-Chan 2013-02-03T19:18:31Z 2013-02-03T19:18:31Z 2015-02-03T11:01:02Z 2012-12 2013-02-03T19:18:31Z 2012-12 Atomic force microscopy was used to image the topography of poly (N-isopropyl acrylamide) brushes end-grafted from initiator-terminated alkane monolayers on gold or on silicon wafers. Measurements were done in air and in water, below and above the lower critical solution temperature of 32°C. At low grafting densities and molecular weights, area-averaged ellipsometry, surface force, and neutron reflectivity measurements did not detect volume changes in the wet polymer brushes above 32°C. However, atomic force microscopy images of the same films reveal surface features that suggest the formation of lateral aggregates or “octopus micelles”. At high grafting densities, the polymer films collapse uniformly. This temperature-dependent swelling and collapse was compared with ellipsometry data and with protein adsorption behavior. Item withdrawn by Mark Zulauf (zulauf@illinois.edu) on 2012-12-13T21:06:58Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 2 Choi_Byung-chan.docx: 9372360 bytes, checksum: 01b3e5d7de9a61db678877edd2ff7a56 (MD5) Choi_Byung-chan.pdf: 1764573 bytes, checksum: 91ba61f0c2ef46b125adf2725c5f2ef6 (MD5) Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Seth Robbins (srobbins@illinois.edu) on 2013-02-03T19:19:09Z Item is restricted until 2015-02-03T19:18:53Z U of I Only Restriction Lifted for Item 42126 on 2015-02-03T11:01:02Z. http://hdl.handle.net/2142/42179 en Copyright 2012 Byung-Chan Choi Poly(N-isopropyl acrylamide) Polymer brush Octopous Micelle topography Protein adsorption Poly (N-isopropyl acrylamide) brush topography: relationship to film collapse and protein adsorption text Chemical & Biomolecular Engr 1687 Chemical Engineering 0300 University of Illinois at Urbana-Champaign Thesis M.S. PHD:Chemical Engineering -UIUC 10KS0300PHD