ナノダイナミクス国際シンポジウム 平成22年1月21日(木) 於長崎大学Nagasaki Symposium on Nano-Dynamics 2010 (NSND2010), January 21, 2010, Nagasaki University, Nagasaki, Japan, Invited Lectur

Hirana Yasuhiko

Nakashima Naotoshi

Niidome Yasurou

Tanaka Yasuhiko

Nagasaki University's Academic Output SITE: NAOSITE

20  Determination of Redox Potentials of Single-walled Carbon Nanotube by Using Spectroelectrochemistry  Yasuhiko Tanaka1, Yasuhiko Hirana1, Yasurou Niidome1, and Naotoshi Nakashima1,2,* 1Department of Applied Chemistry, Graduate School of Engineering, Kyushu University, 744 motooka, Fukuoka 819-0395, Japan 2JST-CREST, 5 Sanbancho, Chiyoda-ku, Tokyo 102-0075, Japan *Tel & Fax: +81-92-802-2840, E-mail: nakashima-tcm@mail.cstm.kyushu-u.ac.jp  Ever since the discovery of single-walled carbon nanotubes (SWCNTs), many groups have endeavored to understand the fundamental properties of the CNTs. The redox properties (i.e. electronic densities, the Fermi levels, redox potentials) of SWCNTs are related to the structures of SWCNTs that have a specified diameter and chirality angle uniquely related to a pair of integers (n,m); i.e., the so-called chiral indices.[1] Many attempts have been made to determine the electronic properties of SWCNTs [2-7] however, the achieved success in the determination of the redox properties as already reported has been low. Here we describe a simple method for the determination of the redox potentials of several individual (n,m)SWCNTs using near-IR PL spectroelectrochemistry. Strategic approaches toward the solubilization of SWCNTs are essential for many applications of SWCNTs[8] and numerous dispersants including carboxymethylcellulose sodium salt (CMC)[9] have been used to individually dissolve SWCNTs. In this study, we fabricated a non-fluorescent transparent indium tin oxide (ITO) electrode modified with a cast film of CMC/poly(diallyldimethylammonium chloride) (PDDA) that contained isolated SWCNTs.  We have discovered that we can determine the redox potentials of isolated SWNTs having their own chirality indices by in situ near-IR PL spectroelectrochemistry at the fabricated modified ITO electrode. This has been achieved by using this modifying film that retains the isolated SWNTs and the spectroelectrochemical results analyzed by regression analysis[10]. References (1) R. Saito et al. Physical Properties of Carbon Nanotubes, Imperial College Press, London, 1998. (2) M. J. O'Connell et al., Nature Mater. 2005, 4, 412. (2) L. Kavan et al., Chem. Phys. Lett. 2000, 328, 363. (3) S. Kazaoui et al., Appl. Phys. Lett. 2001, 78, 3433. (4) K.-i. Okazaki et al., Phys. Rev. B 2003, 68, 035434. (5) P. Corio et al., Chem. Phys. Lett. 2004, 392, 396. (6) D. Paolucci et al., J. Am. Chem. Soc. 2008, 130, 7393. (7) C. Ehli et al., Nature Chem. 2009, 1, 243. (8) N. Nakashima et al.,Soluble Carbon Nanotubes, American Scientific Publisher, California, 2008. (9) N. Minami et al., Appl. Phys. Lett. 2006, 88, 093123. (10) Y. Tanaka et al., Angew. Chem. Int. Ed. 2009, 48, 7655. Nagasaki Symposium on Nano-Dynamics 2010 P 04 

Determination of Redox Potentials of Single-walled Carbon Nanotube by Using Spectroelectrochemistry

https://nagasaki-u.repo.nii.ac.jp/?action=repository_action_common_download&item_id=16901&item_no=1&attribute_id=18&file_no=1

Determination of Redox Potentials of Single-walled Carbon Nanotube by Using Spectroelectrochemistry

Abstract

Similar works

Full text

Available Versions

Nagasaki University's Academic Output SITE: NAOSITE