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Dual distributions for the metallic and semiconducting single-walled carbon nanotubes observed by Raman spectroscopy

Krishnendu Bhattacharyya (*, A), Yoshiyuki Suda (B), Atsushi Okita (B), Takeshi Saito (B), Atsushi Ozeki (B), Masayuki Maekawa (B), Junichi Takayama (B), Hirotake Sugawara (B), Yosuke Sakai (B)

(A)  Netaji Subhash Engineering College, Garia, Near Garia Railway Station, Kolkata, 700 152, India.
(B)   Graduate School of Information Science and Technology, Hokkaido University, North 14 West 9, Sapporo, 060-0814, Japan.

LETTER, Carbon – Science and Technology 1 (2008) 4 – 8.

© Applied Science Innovations Private Limited, India.

Full Text (OPEN ACCESS) : CST-2.pdf

Keywords: Single walled carbon nanotubes, Raman spectroscopy, SWCN, Metallic and semiconducting single walled carbon nanotubes
Abstract: The prospective applicability of single-walled carbon nanotubes (SWNT) is highly dependent on its controlled synthesis. Effects of few macroscopic growth-conditions (such as catalyst composition, temperature of deposition etc.) reflected on the distributions of SWNT (diameter, chiralities and semiconducting-metallic nature), are studied by Raman spectroscopic analysis. We report the presence of two different diameter distributions for as-grown metallic and semiconducting SWNT, the metallic tubes having larger average diameters than their semiconducting counterpart. We hope that, in future, it should be possible to selectively synthesize SWNT with pre-determined chirality, diameter and metallic/semiconducting nature.

 

 


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