Dopant-specific unzipping of carbon nanotubes for intact crystalline graphene nanostructures

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Atomic level engineering of graphene-based materials is in high demand to enable customize structures and properties for different applications. Unzipping of the graphene plane is a potential means to this end, but uncontrollable damage of the two-dimensional crystalline framework during harsh unzipping reaction has remained a key challenge. Here we present heteroatom dopant-specific unzipping of carbon nanotubes as a reliable and controllable route to customized intact crystalline graphene-based nanostructures. Substitutional pyridinic nitrogen dopant sites at carbon nanotubes can selectively initiate the unzipping of graphene side walls at a relatively low electrochemical potential (0.6 V). The resultant nanostructures consisting of unzipped graphene nanoribbons wrapping around carbon nanotube cores maintain the intact two-dimensional crystallinity with well-defined atomic configuration at the unzipped edges. Large surface area and robust electrical connectivity of the synergistic nanostructure demonstrate ultrahigh-power supercapacitor performance, which can serve for AC filtering with the record high rate capability of -85 degrees of phase angle at 120 Hz.
Publisher
NATURE PUBLISHING GROUP
Issue Date
2016-01
Language
English
Article Type
Article
Keywords

PERFORMANCE ELECTROCHEMICAL CAPACITORS; LINE-FILTERING PERFORMANCE; MATERIALS SCIENCE; OXYGEN REDUCTION; QUANTUM DOTS; SMOOTH EDGES; NANORIBBONS; SUPERCAPACITORS; ELECTRODES; GROWTH

Citation

NATURE COMMUNICATIONS, v.7, pp.10364

ISSN
2041-1723
DOI
10.1038/ncomms10364
URI
http://hdl.handle.net/10203/207696
Appears in Collection
CH-Journal Papers(저널논문)NT-Journal Papers(저널논문)MS-Journal Papers(저널논문)
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