Self-assembled PCBM bilayers on graphene and HOPG examined by AFM and STM

dc.contributor.authorLi, Yanlongen
dc.contributor.authorChen, Chuanhuien
dc.contributor.authorBurton, Johnen
dc.contributor.authorPark, Kyungwhaen
dc.contributor.authorHeflin, James R.en
dc.contributor.authorTao, Chenggangen
dc.contributor.departmentCenter for Soft Matter and Biological Physicsen
dc.contributor.departmentPhysicsen
dc.date.accessioned2019-09-10T13:19:42Zen
dc.date.available2019-09-10T13:19:42Zen
dc.date.issued2018-05-04en
dc.description.abstractIn this work we report fabrication and characterization of phenyl-C61-butyric acid methyl ester (PCBM) bilayer structures on graphene and highly oriented pyrolytic graphite (HOPG). Through careful control of the PCBM solution concentration (from 0.1 to 2 mg ml(-1)) and the deposition conditions, we demonstrate that PCBM molecules self-assemble into bilayer structures on graphene and HOPG substrates. Interestingly, the PCBM bilayers are formed with two distinct heights on HOPG, but only one unique representative height on graphene. At elevated annealing temperatures, edge diffusion allows neighboring vacancies to merge into a more ordered structure. This is, to the best of our knowledge, the first experimental realization of PCBM bilayer structures on graphene. This work could provide valuable insight into fabrication of new hybrid, ordered structures for applications to organic solar cells.en
dc.description.notesWe would like to thank Professor Ted Einstein for helpful discussions. CC and CT acknowledge the financial support provided for this work by the US Army Research Office under the grant W911NF-15-1-0414. KP and JB was supported by US National Science Foundation DMR-1206354.en
dc.description.sponsorshipUS Army Research Office [W911NF-15-1-0414]; US National Science Foundation [DMR-1206354]en
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.1088/1361-6528/aab00aen
dc.identifier.eissn1361-6528en
dc.identifier.issn0957-4484en
dc.identifier.issue18en
dc.identifier.other185703en
dc.identifier.pmid29451137en
dc.identifier.urihttp://hdl.handle.net/10919/93519en
dc.identifier.volume29en
dc.language.isoenen
dc.rightsCreative Commons Attribution 3.0 Unporteden
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/en
dc.subjectgrapheneen
dc.subjectatomic force microscopyen
dc.subjectscanning tunneling microscopyen
dc.subjectPCBMen
dc.subjectself-assemblyen
dc.titleSelf-assembled PCBM bilayers on graphene and HOPG examined by AFM and STMen
dc.title.serialNanotechnologyen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten
dc.type.dcmitypeStillImageen
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