Enhanced photoluminescence from very thin double-wall carbon nanotubes synthesized by the zeolite-CCVD method

Naoki Kishi; Satoshi Kikuchi; Palanisamy Ramesh; Toshiki Sugai; Yasuyuki Watanabe; Hisanori Shinohara

doi:10.1021/jp062709j

Enhanced photoluminescence from very thin double-wall carbon nanotubes synthesized by the zeolite-CCVD method

J Phys Chem B. 2006 Dec 14;110(49):24816-21. doi: 10.1021/jp062709j.

Authors

Naoki Kishi¹, Satoshi Kikuchi, Palanisamy Ramesh, Toshiki Sugai, Yasuyuki Watanabe, Hisanori Shinohara

Affiliation

¹ Department of Chemistry and Institute for Advanced Research, Nagoya University, Nagoya 464-8602, Japan.

PMID: 17149899
DOI: 10.1021/jp062709j

Abstract

Photoluminescence (PL) from purified (>90%) double-wall carbon nanotubes (DWNTs), which have been synthesized by zeolite catalyst-supported chemical vapor deposition (zeolite-CCVD), of very small diameters (0.8-nm average inner tube) is reported. The PL contour mappings for various ratios (1-90%) of double- versus single-wall carbon nanotubes by thermal oxidation have enabled us to unambiguously identify the chirality of inner tubes for the DWNTs synthesized. After the extensive high-temperature oxidation at 700 degrees C, high-purity (>90%) DWNTs of approximately 0.8 nm inner diameter are obtained, and most of these correspond to the DWNTs having inner tubes with chiralities of (7,5), (7,6), and (9,4).