{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/50627"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/50627","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Large-scale graphene transfer in ultra-high vacuum and design of a low temperature ultra-high vacuum scanning tunneling microscope","abstract":"This thesis documents a way of transferring large-scale graphene onto clean surfaces in an ultra-high vacuum scanning tunneling microscope chamber via a modified direct contact transfer method. A polyethylene terephthalate (PET) film was chosen as the material for supporting graphene during the in-situ transfer. Both a scanning electron microscope and an atomic force microscope were used to characterize the transferred graphene quality. This is the first demonstration of successfully transferring large-scale graphene in the ultra-high vacuum environment, which opens a lot of opportunities for studying the properties of pristine graphene and graphene-substrate interactions. Secondly, this thesis also documents an ongoing design and construction of a low temperature, ultra-high vacuum scanning tunneling microscope. A novel cooling mechanism was implemented in our design which includes a closed-cycle refrigerator in order to enable longer experiment durations and reduced costs of operation. So far we are able to reach a temperature of ~30 K with the STM scanner, vibration isolation and all electronic connections installed. We believe that this can be further improved by making some minor modifications to our design as our future work in order to reach our goal of operating at a temperature of <10 K.","abstract_html":"This thesis documents a way of transferring large-scale graphene onto clean surfaces in an ultra-high vacuum scanning tunneling microscope chamber via a modified direct contact transfer method. A polyethylene terephthalate (PET) film was chosen as the material for supporting graphene during the in-situ transfer. Both a scanning electron microscope and an atomic force microscope were used to characterize the transferred graphene quality. This is the first demonstration of successfully transferring large-scale graphene in the ultra-high vacuum environment, which opens a lot of opportunities for studying the properties of pristine graphene and graphene-substrate interactions. Secondly, this thesis also documents an ongoing design and construction of a low temperature, ultra-high vacuum scanning tunneling microscope. A novel cooling mechanism was implemented in our design which includes a closed-cycle refrigerator in order to enable longer experiment durations and reduced costs of operation. So far we are able to reach a temperature of ~30 K with the STM scanner, vibration isolation and all electronic connections installed. We believe that this can be further improved by making some minor modifications to our design as our future work in order to reach our goal of operating at a temperature of &lt;10 K.","abstract_has_math":false,"creators":["Liu, Ximeng"],"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":2014,"date_issued":"2014-09-16T17:24:31Z","date_published":"2014-09-16T17:24:31Z","updated_at":"2026-07-22T22:25:40Z","subjects":["Graphene","Scanning tunneling microscopy","Dry contact transfer","Low temperature scanning tunneling microscope"],"languages":["en"],"rights":["Copyright 2014 Ximeng Liu"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/50627","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":["Liu, Ximeng"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2014-09-16T17:24:31Z","2014-08","2014-09-16"]},{"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":["Graphene","Scanning tunneling microscopy","Dry contact transfer","Low temperature scanning tunneling microscope"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2014 Ximeng Liu"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/50627"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["This thesis documents a way of transferring large-scale graphene onto clean surfaces in an ultra-high vacuum scanning tunneling microscope chamber via a modified direct contact transfer method. A polyethylene terephthalate (PET) film was chosen as the material for supporting graphene during the in-situ transfer. Both a scanning electron microscope and an atomic force microscope were used to characterize the transferred graphene quality. This is the first demonstration of successfully transferring large-scale graphene in the ultra-high vacuum environment, which opens a lot of opportunities for studying the properties of pristine graphene and graphene-substrate interactions. Secondly, this thesis also documents an ongoing design and construction of a low temperature, ultra-high vacuum scanning tunneling microscope. A novel cooling mechanism was implemented in our design which includes a closed-cycle refrigerator in order to enable longer experiment durations and reduced costs of operation. So far we are able to reach a temperature of ~30 K with the STM scanner, vibration isolation and all electronic connections installed. We believe that this can be further improved by making some minor modifications to our design as our future work in order to reach our goal of operating at a temperature of <10 K.","Item withdrawn by Mark Zulauf (zulauf@illinois.edu) on 2014-07-18T19:41:58Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 1 Liu_Ximeng.pdf: 1518433 bytes, checksum: 17f8110232c17d24a8a755b09ed572c9 (MD5)","Made available in DSpace on 2014-09-16T17:24:31Z (GMT). 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This is the first demonstration of successfully transferring large-scale graphene in the ultra-high vacuum environment, which opens a lot of opportunities for studying the properties of pristine graphene and graphene-substrate interactions. Secondly, this thesis also documents an ongoing design and construction of a low temperature, ultra-high vacuum scanning tunneling microscope. A novel cooling mechanism was implemented in our design which includes a closed-cycle refrigerator in order to enable longer experiment durations and reduced costs of operation. So far we are able to reach a temperature of ~30 K with the STM scanner, vibration isolation and all electronic connections installed. 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