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dc.contributor.authorMorelos-Gómez, A.-
dc.contributor.authorMuñoz Sandoval, E.-
dc.contributor.authorTerrones, M.-
dc.identifierissn: 1936-0851-
dc.identifier.citationACS Nano 6(3): 2261-2272 (2012)-
dc.description.abstractWe report a novel physicochemical route to produce highly crystalline nitrogen-doped graphene nanoribbons. The technique consists of an abrupt N 2 gas expansion within the hollow core of nitrogen-doped multiwalled carbon nanotubes (CN x-MWNTs) when exposed to a fast thermal shock. The multiwalled nanotube unzipping mechanism is rationalized using molecular dynamics and density functional theory simulations, which highlight the importance of open-ended nanotubes in promoting the efficient introduction of N 2 molecules by capillary action within tubes and surface defects, thus triggering an efficient and atomically smooth unzipping. The so-produced nanoribbons could be few-layered (from graphene bilayer onward) and could exhibit both crystalline zigzag and armchair edges. In contrast to methods developed previously, our technique presents various advantages: (1) the tubes are not heavily oxidized; (2) the method yields sharp atomic edges within the resulting nanoribbons; (3) the technique could be scaled up for the bulk production of crystalline nanoribbons from available MWNT sources; and (4) this route could eventually be used to unzip other types of carbon nanotubes or intercalated layered materials such as BN, MoS 2, WS 2, etc. © 2012 American Chemical Society.-
dc.description.sponsorshipWe acknowledge the support from the Program for Fostering Regional Innovation in Nagano from the Ministry of Education, Culture, Sports, Science and Technology of Japan. M.T., S.V.-D., F.T.-L., R.C.-S., and M.E. acknowledge support from the Research Center for Exotic Nanocarbons, Japan regional Innovation Strategy Program by the Excellence, JST. A.M.-G. acknowledges support from CONACYT for postdoctoral visit. B.G.S. was supported by the Center for Nanophase Materials Sciences, which is sponsored by the Office of Basic Energy Sciences at Oak Ridge National Laboratory, U.S. Department of Energy.-
dc.publisherAmerican Chemical Society-
dc.titleClean nanotube unzipping by abrupt thermal expansion of molecular nitrogen: Graphene nanoribbons with atomically smooth edges-
dc.description.versionPeer Reviewed-
dc.contributor.funderMinistry of Education, Culture, Sports, Science and Technology (Japan)-
dc.contributor.funderConsejo Nacional de Ciencia y Tecnología (México)-
dc.contributor.funderDepartment of Energy (US)-
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