Tags

Type your tag names separated by a space and hit enter

High-quality thin graphene films from fast electrochemical exfoliation.
ACS Nano. 2011 Mar 22; 5(3):2332-9.AN

Abstract

Flexible and ultratransparent conductors based on graphene sheets have been considered as one promising candidate for replacing currently used indium tin oxide films that are unlikely to satisfy future needs due to their increasing cost and losses in conductivity on bending. Here we demonstrate a simple and fast electrochemical method to exfoliate graphite into thin graphene sheets, mainly AB-stacked bilayered graphene with a large lateral size (several to several tens of micrometers). The electrical properties of these exfoliated sheets are readily superior to commonly used reduced graphene oxide, which preparation typically requires many steps including oxidation of graphite and high temperature reduction. These graphene sheets dissolve in dimethyl formamide (DMF), and they can self-aggregate at air-DMF interfaces after adding water as an antisolvent due to their strong surface hydrophobicity. Interestingly, the continuous films obtained exhibit ultratransparency (∼96% transmittance), and their sheet resistance is <1k Ω/sq after a simple HNO3 treatment, superior to those based on reduced graphene oxide or graphene sheets by other exfoliation methods. Raman and STM characterizations corroborate that the graphene sheets exfoliated by our electrochemical method preserve the intrinsic structure of graphene.

Authors+Show Affiliations

Research Center for Applied Sciences, Academia Sinica, Taipei 11529, Taiwan.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

21309565

Citation

Su, Ching-Yuan, et al. "High-quality Thin Graphene Films From Fast Electrochemical Exfoliation." ACS Nano, vol. 5, no. 3, 2011, pp. 2332-9.
Su CY, Lu AY, Xu Y, et al. High-quality thin graphene films from fast electrochemical exfoliation. ACS Nano. 2011;5(3):2332-9.
Su, C. Y., Lu, A. Y., Xu, Y., Chen, F. R., Khlobystov, A. N., & Li, L. J. (2011). High-quality thin graphene films from fast electrochemical exfoliation. ACS Nano, 5(3), 2332-9. https://doi.org/10.1021/nn200025p
Su CY, et al. High-quality Thin Graphene Films From Fast Electrochemical Exfoliation. ACS Nano. 2011 Mar 22;5(3):2332-9. PubMed PMID: 21309565.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - High-quality thin graphene films from fast electrochemical exfoliation. AU - Su,Ching-Yuan, AU - Lu,Ang-Yu, AU - Xu,Yanping, AU - Chen,Fu-Rong, AU - Khlobystov,Andrei N, AU - Li,Lain-Jong, Y1 - 2011/02/10/ PY - 2011/2/12/entrez PY - 2011/2/12/pubmed PY - 2011/8/2/medline SP - 2332 EP - 9 JF - ACS nano JO - ACS Nano VL - 5 IS - 3 N2 - Flexible and ultratransparent conductors based on graphene sheets have been considered as one promising candidate for replacing currently used indium tin oxide films that are unlikely to satisfy future needs due to their increasing cost and losses in conductivity on bending. Here we demonstrate a simple and fast electrochemical method to exfoliate graphite into thin graphene sheets, mainly AB-stacked bilayered graphene with a large lateral size (several to several tens of micrometers). The electrical properties of these exfoliated sheets are readily superior to commonly used reduced graphene oxide, which preparation typically requires many steps including oxidation of graphite and high temperature reduction. These graphene sheets dissolve in dimethyl formamide (DMF), and they can self-aggregate at air-DMF interfaces after adding water as an antisolvent due to their strong surface hydrophobicity. Interestingly, the continuous films obtained exhibit ultratransparency (∼96% transmittance), and their sheet resistance is <1k Ω/sq after a simple HNO3 treatment, superior to those based on reduced graphene oxide or graphene sheets by other exfoliation methods. Raman and STM characterizations corroborate that the graphene sheets exfoliated by our electrochemical method preserve the intrinsic structure of graphene. SN - 1936-086X UR - https://www.unboundmedicine.com/medline/citation/21309565/High_quality_thin_graphene_films_from_fast_electrochemical_exfoliation_ L2 - https://doi.org/10.1021/nn200025p DB - PRIME DP - Unbound Medicine ER -