{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/72141"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/72141","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Surface Diffusion of Antimony on Germanium(111) Investigated by Second Harmonic Microscopy","abstract":"U of I Only","abstract_html":"U of I Only","abstract_has_math":false,"creators":["Schultz, Kurt Alan"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Chemical Engineering","degree_department":null,"school":null,"contributors":["Seebauer, Edmund G."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2014,"date_issued":"2014-12-17T20:39:27Z","date_published":"2014-12-17T20:39:27Z","updated_at":"2026-07-22T22:26:06Z","subjects":["Chemistry, Physical","Physics, Condensed Matter","Physics, Optics"],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["(UMI)AAI9305686"],"render_values":[{"text":"(UMI)AAI9305686","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/72141","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Seebauer, Edmund G."]},{"key":"dc:creator","label":"Author","values":["Schultz, Kurt Alan"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2014-12-17T20:39:27Z","10000-01-01","1992"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Chemical 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":["Chemistry, Physical","Physics, Condensed Matter","Physics, Optics"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/72141","(UMI)AAI9305686"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["U of I Only","Surface diffusion of Sb on Ge(111) has been measured with the newly-developed technique of second harmonic microscopy. In this method, concentration profiles at submonolayer coverage are imaged directly by second harmonic generation with 5 $\\mu$m spatial resolution. A Boltzmann-Matano analysis of the concentration profiles yields the coverage dependence of the diffusivity D without parameterization. Experiments were performed at roughly 70% of the bulk melting temperature T$\\sb{\\rm m}.$ In the coverage range of $0<\\theta<0.6,$ the activation energy E$\\sb{\\rm diff}$ remains constant at 47.5 $\\pm$ 1.5 kcal/mol. The corresponding pre-exponential factor decreases from 8.7 $\\times$ 10$\\sp{3\\pm0.4}$ to 1.6 $\\times$ 10$\\sp{2\\pm0.4}$ cm$\\sp2$/sec. The results are explained in terms of a new vacancy model for surface diffusion at high-temperatures. The model accounts semiquantitatively for the large values of E$\\sb{\\rm diff}$ and D$\\sb{\\rm o},$ and suggest that these quantities may be manipulated by bulk doping levels and photon illumination of the surface.","Made available in DSpace on 2014-12-17T20:39:27Z (GMT). No. of bitstreams: 1 9305686.pdf: 5943423 bytes, checksum: ba3269cd5f50915cf25a622412d95602 (MD5) Previous issue date: 1992","Embargo set by: Seth Robbins for item 72309 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","202 p.","Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1992."]},{"key":"dc:title","label":"Title","values":["Surface Diffusion of Antimony on Germanium(111) Investigated by Second Harmonic Microscopy"]}]}],"canonical_facts":{"dc:contributor":["Seebauer, Edmund G."],"dc:creator":["Schultz, Kurt Alan"],"dc:date":["2014-12-17T20:39:27Z","10000-01-01","1992"],"dc:description":["U of I Only","Surface diffusion of Sb on Ge(111) has been measured with the newly-developed technique of second harmonic microscopy. In this method, concentration profiles at submonolayer coverage are imaged directly by second harmonic generation with 5 $\\mu$m spatial resolution. A Boltzmann-Matano analysis of the concentration profiles yields the coverage dependence of the diffusivity D without parameterization. Experiments were performed at roughly 70% of the bulk melting temperature T$\\sb{\\rm m}.$ In the coverage range of $0<\\theta<0.6,$ the activation energy E$\\sb{\\rm diff}$ remains constant at 47.5 $\\pm$ 1.5 kcal/mol. The corresponding pre-exponential factor decreases from 8.7 $\\times$ 10$\\sp{3\\pm0.4}$ to 1.6 $\\times$ 10$\\sp{2\\pm0.4}$ cm$\\sp2$/sec. The results are explained in terms of a new vacancy model for surface diffusion at high-temperatures. The model accounts semiquantitatively for the large values of E$\\sb{\\rm diff}$ and D$\\sb{\\rm o},$ and suggest that these quantities may be manipulated by bulk doping levels and photon illumination of the surface.","Made available in DSpace on 2014-12-17T20:39:27Z (GMT). No. of bitstreams: 1 9305686.pdf: 5943423 bytes, checksum: ba3269cd5f50915cf25a622412d95602 (MD5) Previous issue date: 1992","Embargo set by: Seth Robbins for item 72309 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","202 p.","Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1992."],"dc:identifier":["http://hdl.handle.net/2142/72141","(UMI)AAI9305686"],"dc:subject":["Chemistry, Physical","Physics, Condensed Matter","Physics, Optics"],"dc:title":["Surface Diffusion of Antimony on Germanium(111) Investigated by Second Harmonic Microscopy"],"dc:type":["text"],"thesis:degree_discipline":["Chemical Engineering"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Ph.D."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:26:06Z"}