Optical spectroscopic studies of thermally coalesced single-walled carbon nanotubes

Daisuke Shimamoto; Hiroyuki Muramatsu; Yong Jung Kim; Yoong Ahm Kim; Takuya Hayashi; Morinobu Endo; Mauricio Terrones; Mildred S. Dresselhaus

doi:10.1166/jnn.2010.1990

Optical spectroscopic studies of thermally coalesced single-walled carbon nanotubes

Daisuke Shimamoto
, Hiroyuki Muramatsu
, Yong Jung Kim
, Yoong Ahm Kim
, Takuya Hayashi
, Morinobu Endo
, Mauricio Terrones
, Mildred S. Dresselhaus

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

Abstract

Changes in the optical properties of thermally coalesced single-walled carbon nanotubes (SWCNTs) caused by heat treatment between 1300 and 2800 °C in argon, have been monitored using optical absorption and photoluminescence spectroscopy. For SWNTs heat treated at 1900 °C, we found a complete disapperance of small-diameter tubes (<1.0 nm) as well as the appearance of enlarged, defective tubes. The decreased sp ²/sp ³ ratio for tubes heat treated below 2100 °C suggests that adjacent small-diameter SWNTs transform into energetically stable larger-diameter SWNTs by the presence of structural non sp ² defects.

Original language	English (US)
Pages (from-to)	3878-3883
Number of pages	6
Journal	Journal of Nanoscience and Nanotechnology
Volume	10
Issue number	6
DOIs	https://doi.org/10.1166/jnn.2010.1990
State	Published - Jun 2010

All Science Journal Classification (ASJC) codes

Bioengineering
General Chemistry
Biomedical Engineering
General Materials Science
Condensed Matter Physics

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10.1166/jnn.2010.1990

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title = "Optical spectroscopic studies of thermally coalesced single-walled carbon nanotubes",

abstract = "Changes in the optical properties of thermally coalesced single-walled carbon nanotubes (SWCNTs) caused by heat treatment between 1300 and 2800 °C in argon, have been monitored using optical absorption and photoluminescence spectroscopy. For SWNTs heat treated at 1900 °C, we found a complete disapperance of small-diameter tubes (<1.0 nm) as well as the appearance of enlarged, defective tubes. The decreased sp 2/sp 3 ratio for tubes heat treated below 2100 °C suggests that adjacent small-diameter SWNTs transform into energetically stable larger-diameter SWNTs by the presence of structural non sp 2 defects.",

author = "Daisuke Shimamoto and Hiroyuki Muramatsu and Kim, \{Yong Jung\} and Kim, \{Yoong Ahm\} and Takuya Hayashi and Morinobu Endo and Mauricio Terrones and Dresselhaus, \{Mildred S.\}",

year = "2010",

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doi = "10.1166/jnn.2010.1990",

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AU - Shimamoto, Daisuke

AU - Muramatsu, Hiroyuki

AU - Kim, Yong Jung

AU - Kim, Yoong Ahm

AU - Hayashi, Takuya

AU - Endo, Morinobu

AU - Terrones, Mauricio

AU - Dresselhaus, Mildred S.

PY - 2010/6

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AB - Changes in the optical properties of thermally coalesced single-walled carbon nanotubes (SWCNTs) caused by heat treatment between 1300 and 2800 °C in argon, have been monitored using optical absorption and photoluminescence spectroscopy. For SWNTs heat treated at 1900 °C, we found a complete disapperance of small-diameter tubes (<1.0 nm) as well as the appearance of enlarged, defective tubes. The decreased sp 2/sp 3 ratio for tubes heat treated below 2100 °C suggests that adjacent small-diameter SWNTs transform into energetically stable larger-diameter SWNTs by the presence of structural non sp 2 defects.

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Optical spectroscopic studies of thermally coalesced single-walled carbon nanotubes

Abstract

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