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It has not been established whether strictly monolayer graphene could be synthesized through the traditional chemical vapor deposition route on metals where carbon is highly soluble, such as Pd (\u22483.5 atom%). In this work, this issue is investigated by suppressing the grain boundary segregation using a pretreatment comprising the annealing of the Pd foils; this method was motivated by the fact that the typical thick growths at the grain boundaries revealed that the grain boundary functions as the main segregation channel in polycrystalline metals. To evaluate the high crystallinity of the as\u2010grown graphene, detailed atomic\u2010scale characterization with scanning tunneling microscopy is performed.<\/jats:p>","DOI":"10.1002\/smll.201400421","type":"journal-article","created":{"date-parts":[[2014,6,10]],"date-time":"2014-06-10T08:08:05Z","timestamp":1402387685000},"page":"4003-4011","source":"Crossref","is-referenced-by-count":16,"title":["High\u2010Quality Monolayer Graphene Synthesis on Pd Foils via the Suppression of Multilayer Growth at Grain Boundaries"],"prefix":"10.1002","volume":"10","author":[{"given":"Donglin","family":"Ma","sequence":"first","affiliation":[{"name":"Center for Nanochemistry (CNC) Beijing National Laboratory for Molecular Sciences State Key Laboratory for Structural Chemistry of Unstable and Stable Species College of Chemistry and Molecular Engineering, Peking University  Beijing 100871 People's Republic of 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