Counter-ion Dependent, Longitudinal Unzipping of Multi-Walled Carbon Nanotubes to Highly Conductive and Transparent Graphene Nanoribbons
IR@CECRI: CSIR-Central Electrochemical Research Institute, Karaikudi
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| Title |
Counter-ion Dependent, Longitudinal
Unzipping of Multi-Walled Carbon
Nanotubes to Highly Conductive and
Transparent Graphene Nanoribbons
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| Creator |
Dhanraj, B. Shinde
Majumder, M. Vijayamohanan, K.Pillai |
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| Subject |
Nanotechnology
Electrochemical Materials Science |
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| Description |
Here we report for the first time, a simple hydrothermal approach for the bulk production of highly
conductive and transparent graphene nanoribbons (GNRs) using several counter ions from K2SO4, KNO3,
KOH and H2SO4 in aqueous media, where, selective intercalation followed by exfoliation gives highly
conducting GNRs with over 80% yield. In these experiments, sulfate and nitrate ions act as a co-intercalant
along with potassium ions resulting into exfoliation of multi-walled carbon nanotubes (MWCNTs) in an
effective manner. The striking similarity of experimental results in KOH and H2SO4 that demonstrates
partially damaged MWCNTs, implies that no individual K1, SO422 ion plays a key role in unwrapping of
MWCNTs, rather this process is largely effective in the presence of both cations and anions working in a
cooperative manner. The GNRs can be used for preparing conductive 16 kVsq21, transparent (82%) and
flexible thin films using low cost fabrication method
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| Date |
2014
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://cecri.csircentral.net/3113/1/047-2014.pdf
Dhanraj, B. Shinde and Majumder, M. and Vijayamohanan, K.Pillai (2014) Counter-ion Dependent, Longitudinal Unzipping of Multi-Walled Carbon Nanotubes to Highly Conductive and Transparent Graphene Nanoribbons. Scientific Reports, 4. p. 4363. ISSN 2045-2322 |
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| Relation |
http://cecri.csircentral.net/3113/
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