In situ optical characterization of the alignment and density of carbon nanotubes

Do Hyung Kim; Hoon Sik Jang; Chang Duk Kim; Dong Soo Cho; Jong Gi Jee; Hyeong Rag Lee

doi:10.1088/0957-4484/14/1/311

In situ optical characterization of the alignment and density of carbon nanotubes

Do Hyung Kim, Hoon Sik Jang, Chang Duk Kim, Dong Soo Cho, Jong Gi Jee, Hyeong Rag Lee

Department of Physics

Kyungpook National University

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

6 Scopus citations

Abstract

Various characteristics of the growth of carbon nanotubes (CNTs) were examined by in situ optical interference patterns. A dc plasma chemical vapour deposition technique was used to grow the CNTs. The optical interference curves provided considerable in situ information such as the length, the alignment and related growth properties of CNTs. Curled CNTs have relatively small numbers of oscillations compared to well-aligned nanotubes during the same growth time. Sparse and short CNTs have shown a high reflectance with no interference oscillations. The alignment of the CNTs was strongly dependent on variations in the NH₃ pre-treatment current. The electric field has a large effect on the direction of growth of well-aligned CNTs with high packing density. However, curled CNTs do not appear to be affected by the presence of the electric field. This optical interference method provides an in situ and effective method for monitoring the growth characteristics of CNTs.

Original language	English
Pages (from-to)	46-49
Number of pages	4
Journal	Nanotechnology
Volume	14
Issue number	1
DOIs	https://doi.org/10.1088/0957-4484/14/1/311
State	Published - Jan 2003

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title = "In situ optical characterization of the alignment and density of carbon nanotubes",

abstract = "Various characteristics of the growth of carbon nanotubes (CNTs) were examined by in situ optical interference patterns. A dc plasma chemical vapour deposition technique was used to grow the CNTs. The optical interference curves provided considerable in situ information such as the length, the alignment and related growth properties of CNTs. Curled CNTs have relatively small numbers of oscillations compared to well-aligned nanotubes during the same growth time. Sparse and short CNTs have shown a high reflectance with no interference oscillations. The alignment of the CNTs was strongly dependent on variations in the NH3 pre-treatment current. The electric field has a large effect on the direction of growth of well-aligned CNTs with high packing density. However, curled CNTs do not appear to be affected by the presence of the electric field. This optical interference method provides an in situ and effective method for monitoring the growth characteristics of CNTs.",

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AU - Kim, Do Hyung

AU - Jang, Hoon Sik

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AU - Cho, Dong Soo

AU - Jee, Jong Gi

AU - Lee, Hyeong Rag

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AB - Various characteristics of the growth of carbon nanotubes (CNTs) were examined by in situ optical interference patterns. A dc plasma chemical vapour deposition technique was used to grow the CNTs. The optical interference curves provided considerable in situ information such as the length, the alignment and related growth properties of CNTs. Curled CNTs have relatively small numbers of oscillations compared to well-aligned nanotubes during the same growth time. Sparse and short CNTs have shown a high reflectance with no interference oscillations. The alignment of the CNTs was strongly dependent on variations in the NH3 pre-treatment current. The electric field has a large effect on the direction of growth of well-aligned CNTs with high packing density. However, curled CNTs do not appear to be affected by the presence of the electric field. This optical interference method provides an in situ and effective method for monitoring the growth characteristics of CNTs.

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In situ optical characterization of the alignment and density of carbon nanotubes

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