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Power factor enhancement for few-layered graphene films by molecular attachments

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Power factor enhancement for few-layered graphene films by molecular attachments

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dc.contributor.author Sim, Daohao
dc.contributor.author Liu, Dayong
dc.contributor.author Dong, Xiaochen
dc.contributor.author Xiao, Ni
dc.contributor.author Li, Sean
dc.contributor.author Zhao, Yang
dc.contributor.author Li, Lain-Jong
dc.contributor.author Yan, Qingyu
dc.contributor.author Hng, Huey Hoon
dc.date.accessioned 2012-01-06T06:33:35Z
dc.date.available 2012-01-06T06:33:35Z
dc.date.copyright 2011
dc.date.issued 2012-01-06
dc.identifier.citation Sim, D., Liu, D., Dong, X., Xiao, N., Li, S., Zhao, Y., et al. (2011). Power Factor Enhancement for Few-Layered Graphene Films by Molecular Attachments, The Journal of Physical Chemistry C, 115(5), 1780-1785.
dc.identifier.uri http://hdl.handle.net/10220/7451
dc.description.abstract In this work, we prepared few-layered graphene (FLG) films and investigated their thermoelectric properties. It was found that pristine FLG films showed a low thermopower of ~40 μV/K. We further processed these FLG films by attaching them with 1,1′-azobis(cyanocyclohexane) or 1,3,6,8-pyrenetetrasulfonic acid. The thermopower of FLG films with attached molecules increased to above ~180 μV/K. Such enhancement in the thermopower led to an increase in their power factor by more than 4.5 times. Theoretical investigation indicated that a potential difference can be introduced between the outer layer and inner layer of FLG films upon molecule attachments. Simulation of the thermopower based on Kubo’s formula provided qualitative support to our experimental results.
dc.language.iso en
dc.relation.ispartofseries The journal of physical chemistry C
dc.rights © 2011 American Chemical Society. This is the author created version of a work that has been peer reviewed and accepted for publication by The Journal of Physical Chemistry C, American Chemical Society. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: http://dx.doi.org/10.1021/jp1103609.
dc.subject DRNTU::Engineering::Materials::Nanostructured materials.
dc.title Power factor enhancement for few-layered graphene films by molecular attachments
dc.type Journal Article
dc.contributor.school School of Materials Science and Engineering
dc.identifier.doi http://dx.doi.org/10.1021/jp1103609
dc.description.version Accepted version

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