Close-open-close evolution of holes at the tips of conical graphenes of single-wall carbon nanohorns

Jing Fan; Ryota Yuge; Jin Miyawaki; Takazumi Kawai; Sumio Iijima; Masako Yudasaka

doi:10.1021/jp800113w

Close-open-close evolution of holes at the tips of conical graphenes of single-wall carbon nanohorns

Jing Fan, Ryota Yuge, Jin Miyawaki, Takazumi Kawai, Sumio Iijima, Masako Yudasaka

Research output: Contribution to journal › Article

13 Citations (Scopus)

Abstract

We previously reported that holes opened at the tips of conical single-graphenes of single-wall carbon nanohorns were closed during heat treatment at 1200 °C in an argon atmosphere. Here, we report phenomena related to the behavior of these holes: the holes closed quickly at first, then reopened, and then slowly closed again as the heat treatment period increased. This close-open-close evolution occurred only when the initial hole size was medium (0.7-0.9 nm). Smaller and larger holes did not reopen after they thermally closed. We discuss the close-open-close mechanism by considering the functions of oxygenated groups existing at the edges of the holes.

Original language	English
Pages (from-to)	8600-8603
Number of pages	4
Journal	Journal of Physical Chemistry C
Volume	112
Issue number	23
DOIs	https://doi.org/10.1021/jp800113w
Publication status	Published - Jun 12 2008
Externally published	Yes

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Energy(all)
Physical and Theoretical Chemistry
Surfaces, Coatings and Films

Access to Document

10.1021/jp800113w

Fingerprint Dive into the research topics of 'Close-open-close evolution of holes at the tips of conical graphenes of single-wall carbon nanohorns'. Together they form a unique fingerprint.

Cite this

@article{99198a8581924e7997fc2e69a32ea600,

title = "Close-open-close evolution of holes at the tips of conical graphenes of single-wall carbon nanohorns",

abstract = "We previously reported that holes opened at the tips of conical single-graphenes of single-wall carbon nanohorns were closed during heat treatment at 1200 °C in an argon atmosphere. Here, we report phenomena related to the behavior of these holes: the holes closed quickly at first, then reopened, and then slowly closed again as the heat treatment period increased. This close-open-close evolution occurred only when the initial hole size was medium (0.7-0.9 nm). Smaller and larger holes did not reopen after they thermally closed. We discuss the close-open-close mechanism by considering the functions of oxygenated groups existing at the edges of the holes.",

author = "Jing Fan and Ryota Yuge and Jin Miyawaki and Takazumi Kawai and Sumio Iijima and Masako Yudasaka",

year = "2008",

month = jun,

day = "12",

doi = "10.1021/jp800113w",

language = "English",

volume = "112",

pages = "8600--8603",

journal = "Journal of Physical Chemistry C",

issn = "1932-7447",

publisher = "American Chemical Society",

number = "23",

}

TY - JOUR

T1 - Close-open-close evolution of holes at the tips of conical graphenes of single-wall carbon nanohorns

AU - Fan, Jing

AU - Yuge, Ryota

AU - Miyawaki, Jin

AU - Kawai, Takazumi

AU - Iijima, Sumio

AU - Yudasaka, Masako

PY - 2008/6/12

Y1 - 2008/6/12

N2 - We previously reported that holes opened at the tips of conical single-graphenes of single-wall carbon nanohorns were closed during heat treatment at 1200 °C in an argon atmosphere. Here, we report phenomena related to the behavior of these holes: the holes closed quickly at first, then reopened, and then slowly closed again as the heat treatment period increased. This close-open-close evolution occurred only when the initial hole size was medium (0.7-0.9 nm). Smaller and larger holes did not reopen after they thermally closed. We discuss the close-open-close mechanism by considering the functions of oxygenated groups existing at the edges of the holes.

AB - We previously reported that holes opened at the tips of conical single-graphenes of single-wall carbon nanohorns were closed during heat treatment at 1200 °C in an argon atmosphere. Here, we report phenomena related to the behavior of these holes: the holes closed quickly at first, then reopened, and then slowly closed again as the heat treatment period increased. This close-open-close evolution occurred only when the initial hole size was medium (0.7-0.9 nm). Smaller and larger holes did not reopen after they thermally closed. We discuss the close-open-close mechanism by considering the functions of oxygenated groups existing at the edges of the holes.

UR - http://www.scopus.com/inward/record.url?scp=53549103578&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=53549103578&partnerID=8YFLogxK

U2 - 10.1021/jp800113w

DO - 10.1021/jp800113w

M3 - Article

AN - SCOPUS:53549103578

VL - 112

SP - 8600

EP - 8603

JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

SN - 1932-7447

IS - 23

ER -