{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/101777"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/101777","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Scanning tunneling microscopy and spectroscopy of wet chemical synthesized porous graphene nanoribbons in ultra-high vacuum","abstract":"The student, Kaitlyn Parsons, accepted the attached license on 2018-06-29 at 12:21.","abstract_html":"The student, Kaitlyn Parsons, accepted the attached license on 2018-06-29 at 12:21.","abstract_has_math":false,"creators":["Parsons, Kaitlyn Ann"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Electrical & Computer Engr","degree_department":null,"school":null,"contributors":["Lyding, Joseph W."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2018,"date_issued":"2018-09-27T16:47:15Z","date_published":"2018-09-27T16:47:15Z","updated_at":"2026-07-22T22:24:40Z","subjects":["scanning tunneling microscopy","graphene nanoribbons","scanning tunneling spectroscopy"],"languages":["en"],"rights":["Copyright 2018 Kaitlyn Parsons"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/101777","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Lyding, Joseph W."]},{"key":"dc:creator","label":"Author","values":["Parsons, Kaitlyn Ann"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2018-09-27T16:47:15Z","2020-09-28T09:15:25Z","2018-07-02","2018-08"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Electrical & Computer Engr"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["M.S."]},{"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":["scanning tunneling microscopy","graphene nanoribbons","scanning tunneling spectroscopy"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2018 Kaitlyn Parsons"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/101777"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["The student, Kaitlyn Parsons, accepted the attached license on 2018-06-29 at 12:21.","The student, Kaitlyn Parsons, submitted this Thesis for approval on 2018-06-29 at 12:28.","This Thesis was approved for publication on 2018-07-02 at 08:57.","DSpace SAF Submission Ingestion Package generated from Vireo submission #12691 on 2018-09-27 at 11:33:52","This thesis investigates wet chemically synthesized graphene nanoribbons (GNRs) on semiconductor substrates using scanning tunneling microscopy and documents the extensive maintenance required for the ultra-high vacuum chamber systems. After venting the ultra-high vacuum chamber system to atmosphere, numerous innovations and repairs were made to the chamber. An extended titanium sublimation pump was added to the scanning tunneling microscope chamber. The preparation chamber dipstick was redesigned. Challenges arose that included taking apart the preparation chamber ion pump, replacing two turbo pumps and resolving a challenging leak. The final bake-out procedure resulted in chamber base pressure of 9 ́10-11 Torr. Atomically precise porous GNRs are a new chemically synthesized variation for which the fabrication procedure yielding multiple pores in a single ribbon and the electronic details of the ribbon have not been reported. In this work, porous GNRs are dry contact transferred in ultrahigh vacuum to clean silicon and III-V semiconducting substrates and examined using UHV scanning tunneling microscopy (STM) and spectroscopy (STS). STM imaging confirms the expected porous structure and indicates a unique electronic feature at the graphene nanopores.","Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2020-08-01","Made available in DSpace on 2018-09-27T16:47:15Z (GMT). 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After venting the ultra-high vacuum chamber system to atmosphere, numerous innovations and repairs were made to the chamber. An extended titanium sublimation pump was added to the scanning tunneling microscope chamber. The preparation chamber dipstick was redesigned. Challenges arose that included taking apart the preparation chamber ion pump, replacing two turbo pumps and resolving a challenging leak. The final bake-out procedure resulted in chamber base pressure of 9 ́10-11 Torr. Atomically precise porous GNRs are a new chemically synthesized variation for which the fabrication procedure yielding multiple pores in a single ribbon and the electronic details of the ribbon have not been reported. In this work, porous GNRs are dry contact transferred in ultrahigh vacuum to clean silicon and III-V semiconducting substrates and examined using UHV scanning tunneling microscopy (STM) and spectroscopy (STS). STM imaging confirms the expected porous structure and indicates a unique electronic feature at the graphene nanopores.","Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2020-08-01","Made available in DSpace on 2018-09-27T16:47:15Z (GMT). No. of bitstreams: 2 PARSONS-THESIS-2018.pdf: 23651435 bytes, checksum: 0dda126ebc7bebefb7507ab92db365cf (MD5) LICENSE.txt: 4212 bytes, checksum: 3ab47dda7b33441adfcfa910035b7b8c (MD5) Previous issue date: 2018-07-02","Embargo set by: Seth Robbins for item 107878 Lift date: 2020-09-27T16:47:41Z Reason: Author requested closed access (OA after 2yrs) in Vireo ETD system","Limited Restriction Lifted for Item 107878 on 2020-09-28T09:15:25Z."],"dc:format":["application/pdf"],"dc:identifier":["http://hdl.handle.net/2142/101777"],"dc:language":["en"],"dc:rights":["Copyright 2018 Kaitlyn Parsons"],"dc:subject":["scanning tunneling microscopy","graphene nanoribbons","scanning tunneling spectroscopy"],"dc:title":["Scanning tunneling microscopy and spectroscopy of wet chemical synthesized porous graphene nanoribbons in ultra-high vacuum"],"dc:type":["text"],"thesis:degree_discipline":["Electrical & Computer Engr"],"thesis:degree_level":["Thesis"],"thesis:degree_name":["M.S."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:24:40Z"}