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 Maldonado; 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 Maldonado, Mildred S. Dresselhaus

Research output: Contribution to journal › Article

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 1 2010

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All Science Journal Classification (ASJC) codes

Medicine(all)

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Shimamoto, D., Muramatsu, H., Kim, Y. J., Kim, Y. A., Hayashi, T., Endo, M., Terrones Maldonado, M., & Dresselhaus, M. S. (2010). Optical spectroscopic studies of thermally coalesced single-walled carbon nanotubes. Journal of Nanoscience and Nanotechnology, 10(6), 3878-3883. https://doi.org/10.1166/jnn.2010.1990

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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.",

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Optical spectroscopic studies of thermally coalesced single-walled carbon nanotubes. / Shimamoto, Daisuke; Muramatsu, Hiroyuki; Kim, Yong Jung; Kim, Yoong Ahm; Hayashi, Takuya; Endo, Morinobu; Terrones Maldonado, Mauricio; Dresselhaus, Mildred S.

In: Journal of Nanoscience and Nanotechnology, Vol. 10, No. 6, 01.06.2010, p. 3878-3883.

Research output: Contribution to journal › Article

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10.1166/jnn.2010.1990