{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/82762"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/82762","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Diffusion of Prodan on Self -Assembled Monolayers and Grafted Polymer Layers","abstract":"Two grafted polymer layers were synthesized, for diffusion studies, with surface-initiated polymerization (SIP). The results suggest that there is very little bulk translational diffusion in first layer, poly (N-isopropylacrylamide) (PNIPAM). Rather, fluorescence recovery is thought to be due to either rotational diffusion or a combination of fast surface diffusion and slow bulk diffusion. Increasing relative humidity enhanced recovery. FRAP results for prodan on the second grafted layer, poly (oligoethylene glycol acrylatmide) (POEGA) indicate that there is indeed bulk diffusion; D is calculated to be ∼1--3 x 10-8 cm2/s. Directed diffusion is accomplished by patterning lines on a sample with reactive ion etching (RIE). This method greatly reduces recovery due to surface diffusion, but rotational diffusion still occurs. Increasing relative humidity or ethanol vapor increased the recovery rate.","abstract_html":"Two grafted polymer layers were synthesized, for diffusion studies, with surface-initiated polymerization (SIP). The results suggest that there is very little bulk translational diffusion in first layer, poly (N-isopropylacrylamide) (PNIPAM). Rather, fluorescence recovery is thought to be due to either rotational diffusion or a combination of fast surface diffusion and slow bulk diffusion. Increasing relative humidity enhanced recovery. FRAP results for prodan on the second grafted layer, poly (oligoethylene glycol acrylatmide) (POEGA) indicate that there is indeed bulk diffusion; D is calculated to be ∼1--3 x 10-8 cm2/s. Directed diffusion is accomplished by patterning lines on a sample with reactive ion etching (RIE). This method greatly reduces recovery due to surface diffusion, but rotational diffusion still occurs. Increasing relative humidity or ethanol vapor increased the recovery rate.","abstract_has_math":false,"creators":["Heitzman, Carla Ellen"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Materials Science and Engineering","degree_department":null,"school":null,"contributors":["Paul Braun"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2015,"date_issued":"2015-09-25T20:52:55Z","date_published":"2015-09-25T20:52:55Z","updated_at":"2026-07-22T22:26:18Z","subjects":["Engineering, Materials Science"],"languages":["eng"],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["(MiAaPQ)AAI3182276"],"render_values":[{"text":"(MiAaPQ)AAI3182276","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/82762","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Paul Braun"]},{"key":"dc:creator","label":"Author","values":["Heitzman, Carla Ellen"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2015-09-25T20:52:55Z","10000-01-01","2005"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Materials Science and Engineering"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Engineering, Materials Science"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["eng"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/82762","(MiAaPQ)AAI3182276"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Two grafted polymer layers were synthesized, for diffusion studies, with surface-initiated polymerization (SIP). The results suggest that there is very little bulk translational diffusion in first layer, poly (N-isopropylacrylamide) (PNIPAM). Rather, fluorescence recovery is thought to be due to either rotational diffusion or a combination of fast surface diffusion and slow bulk diffusion. Increasing relative humidity enhanced recovery. FRAP results for prodan on the second grafted layer, poly (oligoethylene glycol acrylatmide) (POEGA) indicate that there is indeed bulk diffusion; D is calculated to be ∼1--3 x 10-8 cm2/s. Directed diffusion is accomplished by patterning lines on a sample with reactive ion etching (RIE). This method greatly reduces recovery due to surface diffusion, but rotational diffusion still occurs. Increasing relative humidity or ethanol vapor increased the recovery rate.","Made available in DSpace on 2015-09-25T20:52:55Z (GMT). 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The results suggest that there is very little bulk translational diffusion in first layer, poly (N-isopropylacrylamide) (PNIPAM). Rather, fluorescence recovery is thought to be due to either rotational diffusion or a combination of fast surface diffusion and slow bulk diffusion. Increasing relative humidity enhanced recovery. FRAP results for prodan on the second grafted layer, poly (oligoethylene glycol acrylatmide) (POEGA) indicate that there is indeed bulk diffusion; D is calculated to be ∼1--3 x 10-8 cm2/s. Directed diffusion is accomplished by patterning lines on a sample with reactive ion etching (RIE). This method greatly reduces recovery due to surface diffusion, but rotational diffusion still occurs. Increasing relative humidity or ethanol vapor increased the recovery rate.","Made available in DSpace on 2015-09-25T20:52:55Z (GMT). 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