Hollow “graphene” microtubes using polyacrylonitrile nanofiber template and potential applications of field emission

Zeyu Guo; He Dong Huang; Lixiang Zhong; Ruitao Lv; Zheng Hong Huang; Jia Li; Nestor Perea-Lopez; Pengyan Yang; Mauricio Terrones; Rodney S. Ruoff; Feiyu Kang

doi:10.1016/j.carbon.2020.05.110

Hollow “graphene” microtubes using polyacrylonitrile nanofiber template and potential applications of field emission

Zeyu Guo^*, He Dong Huang, Lixiang Zhong, Ruitao Lv, Zheng Hong Huang^*, Jia Li^*, Nestor Perea-Lopez, Pengyan Yang, Mauricio Terrones, Rodney S. Ruoff, Feiyu Kang^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

We report a simple process to connect graphene sheets forming graphene hollow microtubes (GHMs), where the tube diameter can be adjusted in the 100–500 nm range by changing reaction conditions. We discovered that graphene sheets can be seamlessly linked to each other if C atoms are substituted for N atoms at the edges of the sheets during annealing of graphene oxide(G-O)-coated electrospun PAN carbon fibers in ammonia atmosphere. The G-O/carbon hybrid nanofibers framework served as a confining template around which graphene sheets curved to form tubular structures. The GHMs formed by this process are similar to (very) large diameter carbon nanotubes (CNTs) with relatively low curvature whose electron field-emission properties include a low turn-on voltage of 0.18 V/μm (at J = 10 μA/cm²), low threshold field of 0.35 V/μm (at J = 10 mA/cm²), and high field-emission stability. This process to produce GHMs can be scaled up to fabricate GHMs of variable diameter in bulk quantities.

Original language	English
Pages (from-to)	439-445
Number of pages	7
Journal	Carbon
Volume	167
DOIs	https://doi.org/10.1016/j.carbon.2020.05.110
Publication status	Published - 15 Oct 2020
Externally published	Yes

Keywords

Carbon nanofiber
Field-emission
Graphene
Hollow microtubes
Template

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10.1016/j.carbon.2020.05.110

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title = "Hollow “graphene” microtubes using polyacrylonitrile nanofiber template and potential applications of field emission",

abstract = "We report a simple process to connect graphene sheets forming graphene hollow microtubes (GHMs), where the tube diameter can be adjusted in the 100–500 nm range by changing reaction conditions. We discovered that graphene sheets can be seamlessly linked to each other if C atoms are substituted for N atoms at the edges of the sheets during annealing of graphene oxide(G-O)-coated electrospun PAN carbon fibers in ammonia atmosphere. The G-O/carbon hybrid nanofibers framework served as a confining template around which graphene sheets curved to form tubular structures. The GHMs formed by this process are similar to (very) large diameter carbon nanotubes (CNTs) with relatively low curvature whose electron field-emission properties include a low turn-on voltage of 0.18 V/μm (at J = 10 μA/cm2), low threshold field of 0.35 V/μm (at J = 10 mA/cm2), and high field-emission stability. This process to produce GHMs can be scaled up to fabricate GHMs of variable diameter in bulk quantities.",

keywords = "Carbon nanofiber, Field-emission, Graphene, Hollow microtubes, Template",

author = "Zeyu Guo and Huang, {He Dong} and Lixiang Zhong and Ruitao Lv and Huang, {Zheng Hong} and Jia Li and Nestor Perea-Lopez and Pengyan Yang and Mauricio Terrones and Ruoff, {Rodney S.} and Feiyu Kang",

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year = "2020",

month = oct,

day = "15",

doi = "10.1016/j.carbon.2020.05.110",

language = "English",

volume = "167",

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journal = "Carbon",

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AU - Guo, Zeyu

AU - Huang, He Dong

AU - Zhong, Lixiang

AU - Lv, Ruitao

AU - Huang, Zheng Hong

AU - Li, Jia

AU - Perea-Lopez, Nestor

AU - Yang, Pengyan

AU - Terrones, Mauricio

AU - Ruoff, Rodney S.

AU - Kang, Feiyu

PY - 2020/10/15

Y1 - 2020/10/15

N2 - We report a simple process to connect graphene sheets forming graphene hollow microtubes (GHMs), where the tube diameter can be adjusted in the 100–500 nm range by changing reaction conditions. We discovered that graphene sheets can be seamlessly linked to each other if C atoms are substituted for N atoms at the edges of the sheets during annealing of graphene oxide(G-O)-coated electrospun PAN carbon fibers in ammonia atmosphere. The G-O/carbon hybrid nanofibers framework served as a confining template around which graphene sheets curved to form tubular structures. The GHMs formed by this process are similar to (very) large diameter carbon nanotubes (CNTs) with relatively low curvature whose electron field-emission properties include a low turn-on voltage of 0.18 V/μm (at J = 10 μA/cm2), low threshold field of 0.35 V/μm (at J = 10 mA/cm2), and high field-emission stability. This process to produce GHMs can be scaled up to fabricate GHMs of variable diameter in bulk quantities.

AB - We report a simple process to connect graphene sheets forming graphene hollow microtubes (GHMs), where the tube diameter can be adjusted in the 100–500 nm range by changing reaction conditions. We discovered that graphene sheets can be seamlessly linked to each other if C atoms are substituted for N atoms at the edges of the sheets during annealing of graphene oxide(G-O)-coated electrospun PAN carbon fibers in ammonia atmosphere. The G-O/carbon hybrid nanofibers framework served as a confining template around which graphene sheets curved to form tubular structures. The GHMs formed by this process are similar to (very) large diameter carbon nanotubes (CNTs) with relatively low curvature whose electron field-emission properties include a low turn-on voltage of 0.18 V/μm (at J = 10 μA/cm2), low threshold field of 0.35 V/μm (at J = 10 mA/cm2), and high field-emission stability. This process to produce GHMs can be scaled up to fabricate GHMs of variable diameter in bulk quantities.

KW - Carbon nanofiber

KW - Field-emission

KW - Graphene

KW - Hollow microtubes

KW - Template

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U2 - 10.1016/j.carbon.2020.05.110

DO - 10.1016/j.carbon.2020.05.110

M3 - Article

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SN - 0008-6223

VL - 167

SP - 439

EP - 445

JO - Carbon

JF - Carbon

ER -

Hollow “graphene” microtubes using polyacrylonitrile nanofiber template and potential applications of field emission

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Keywords

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