Characterization of the intrinsic electrical properties of Nanoporous Graphene (NPG) requires transferring it from gold, its growth substrate, onto a non-conductive substrate. Once wet (i.e. chemical) transfer methods have proven unfit because of the physicochemical changes caused to NPG, the dry (i.e. physical) transfer approach arises as the most reliable method to keep NPG pristine properties. Yet, this process requires the previous electrical and chemical decoupling of NPG from gold, which is foreseen through the intercalation and post-oxidation of Cu or Al.
The present work features our results regarding Cu intercalation of NPG and post-oxidation of Cu-intercalated NPG, being the most unexpected result the spontaneous Cu intercalation of NPG at room temperature, without the need to subject the sample to any post-annealing. This shows how low the energetic barrier for its intercalation is, in the case of NPG/Au(111).
Post-oxidation of a 1.9- Cu – ML intercalated NPG sample in 1 x 10-6 mbar of oxygen while held at 200oC apparently proved successful. Copper oxide was spotted by means of visual comparison with previously reported studies of oxidation of ultrathin Cu layers on Au(111), and identification of the corresponding topographical features. Further characterization is needed in order to elucidate the oxide phase. It is remarkable that no copper oxide was found intercalating NPG. Thus, NPG may work as an oxidation protective barrier for the underneath, already intercalated copper.
Major project supervisor
Minor project supervisor
Carrer del Comte d’Urgell 187
Building 12A (BIST)
Barcelona 08036
T. +34 938 293 603
The Barcelona Institute of Science and Technology is a multidisciplinary research institute formed by the alliance of seven top research centers in Barcelona commited to creating a collaborative environment of multidisciplinary scientific excellence.
Necessary cookies are absolutely essential for the website to function properly. This category only includes cookies that ensures basic functionalities and security features of the website. These cookies do not store any personal information.
Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. It is mandatory to procure user consent prior to running these cookies on your website.