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

Nature Communications
Joonwon LimSang Ouk Kim

Abstract

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° of phase angle at 120 Hz.

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Citations

May 6, 2016·ACS Applied Materials & Interfaces·Narendra KurraHusam N Alshareef
Jul 10, 2019·Angewandte Chemie·En ZhangStefan Kaskel
Mar 25, 2019·Evidence-based Complementary and Alternative Medicine : ECAM·Shengrong LongGuangyu Li
Jun 6, 2017·Nature Communications·Joseph S FriedmanAlan V Sahakian
Oct 8, 2020·Nature Communications·Suchithra Padmajan SasikalaSang Ouk Kim
Mar 4, 2021·ACS Nano·Vivek SaraswatMichael S Arnold
May 13, 2021·Advanced Materials·Mariana C F CostaAntonio H Castro Neto
Dec 17, 2020·ACS Applied Materials & Interfaces·Kyu Hyo HanSang Ouk Kim
Nov 8, 2017·ACS Applied Materials & Interfaces·Joonwon LimSang Ouk Kim
Sep 24, 2019·ACS Applied Materials & Interfaces·Ho Jin LeeSang Ouk Kim
Aug 28, 2021·Nanomaterials·Jin Ah LeeSang Ouk Kim
Nov 6, 2021·ACS Applied Materials & Interfaces·Shuting ZhangYong Jin

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Methods Mentioned

BETA
scanning electron microscopy
transmission electron microscopy
atomic-force microscopy
X-ray

Software Mentioned

Vienna Ab - initio Simulation Package codes

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