Study of CNT synthesis mechanism by in-situ spectroscopy

Yun Shuo Hsieh; Yi Chun Chen; Hsiu Fung Cheng; I. Nan Lin

doi:10.1016/j.diamond.2003.12.025

Study of CNT synthesis mechanism by in-situ spectroscopy

Yun Shuo Hsieh, Yi Chun Chen, Hsiu Fung Cheng, I. Nan Lin

Department of Physics

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

2 Citations (Scopus)

Abstract

Optical emission spectra (OES) of the plasma during synthesis of carbon nanotubes (CNTs) were in-situ examined for the purpose of understanding the formation mechanism of CNTs. It is observed that simultaneous presence of abundant amount of neutral Fe-atoms and the neutral (or singly-ionized) carbon-atoms in the plasma, but without the induction of carbon clusters, is necessary for growing CNTs. The optimum chamber pressure required is 400 Torr in 100 W microwave powers, which corresponds to 5000 K plasma temperature. The CNTs are presumed to form via gas phase nucleation process and thus obtained CNTs are multi-wall, approximately 30-70 nm in diameter.

Original language	English
Pages (from-to)	999-1003
Number of pages	5
Journal	Diamond and Related Materials
Volume	13
Issue number	4-8
DOIs	https://doi.org/10.1016/j.diamond.2003.12.025
Publication status	Published - 2004 Apr

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
General Chemistry
Mechanical Engineering
Materials Chemistry
Electrical and Electronic Engineering

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10.1016/j.diamond.2003.12.025

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title = "Study of CNT synthesis mechanism by in-situ spectroscopy",

abstract = "Optical emission spectra (OES) of the plasma during synthesis of carbon nanotubes (CNTs) were in-situ examined for the purpose of understanding the formation mechanism of CNTs. It is observed that simultaneous presence of abundant amount of neutral Fe-atoms and the neutral (or singly-ionized) carbon-atoms in the plasma, but without the induction of carbon clusters, is necessary for growing CNTs. The optimum chamber pressure required is 400 Torr in 100 W microwave powers, which corresponds to 5000 K plasma temperature. The CNTs are presumed to form via gas phase nucleation process and thus obtained CNTs are multi-wall, approximately 30-70 nm in diameter.",

author = "Hsieh, {Yun Shuo} and Chen, {Yi Chun} and Cheng, {Hsiu Fung} and Lin, {I. Nan}",

note = "Funding Information: Financial supports of National Science Council, R.O.C. through the projects NSC 91-2622-E-007-027, NSC 91-2120-E-003-001 and NSC 92-2622-E-007-016, NSC 92-2210-E-003-001 are gratefully acknowledged by the authors. ",

year = "2004",

month = apr,

doi = "10.1016/j.diamond.2003.12.025",

language = "English",

volume = "13",

pages = "999--1003",

journal = "Diamond and Related Materials",

issn = "0925-9635",

publisher = "Elsevier BV",

number = "4-8",

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TY - JOUR

T1 - Study of CNT synthesis mechanism by in-situ spectroscopy

AU - Hsieh, Yun Shuo

AU - Chen, Yi Chun

AU - Cheng, Hsiu Fung

AU - Lin, I. Nan

N1 - Funding Information: Financial supports of National Science Council, R.O.C. through the projects NSC 91-2622-E-007-027, NSC 91-2120-E-003-001 and NSC 92-2622-E-007-016, NSC 92-2210-E-003-001 are gratefully acknowledged by the authors.

PY - 2004/4

Y1 - 2004/4

N2 - Optical emission spectra (OES) of the plasma during synthesis of carbon nanotubes (CNTs) were in-situ examined for the purpose of understanding the formation mechanism of CNTs. It is observed that simultaneous presence of abundant amount of neutral Fe-atoms and the neutral (or singly-ionized) carbon-atoms in the plasma, but without the induction of carbon clusters, is necessary for growing CNTs. The optimum chamber pressure required is 400 Torr in 100 W microwave powers, which corresponds to 5000 K plasma temperature. The CNTs are presumed to form via gas phase nucleation process and thus obtained CNTs are multi-wall, approximately 30-70 nm in diameter.

AB - Optical emission spectra (OES) of the plasma during synthesis of carbon nanotubes (CNTs) were in-situ examined for the purpose of understanding the formation mechanism of CNTs. It is observed that simultaneous presence of abundant amount of neutral Fe-atoms and the neutral (or singly-ionized) carbon-atoms in the plasma, but without the induction of carbon clusters, is necessary for growing CNTs. The optimum chamber pressure required is 400 Torr in 100 W microwave powers, which corresponds to 5000 K plasma temperature. The CNTs are presumed to form via gas phase nucleation process and thus obtained CNTs are multi-wall, approximately 30-70 nm in diameter.

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U2 - 10.1016/j.diamond.2003.12.025

DO - 10.1016/j.diamond.2003.12.025

M3 - Article

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SN - 0925-9635

VL - 13

SP - 999

EP - 1003

JO - Diamond and Related Materials

JF - Diamond and Related Materials

IS - 4-8

ER -

Study of CNT synthesis mechanism by in-situ spectroscopy

Abstract

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