Redox properties of a single (7,5) single-walled carbon nanotube determined by an in situ photoluminescence spectroelectrochemical method

被引：8

作者：

Hong, Liu ^{[1
]}

Mouri, Shinichiro ^{[2
]}

Miyauchi, Yuhei ^{[2
,3
]}

Matsuda, Kazunari ^{[2
]}

Nakashima, Naotoshi ^{[1
,4
,5
]}

机构：

[1] Kyushu Univ, Grad Sch Engn, Dept Appl Chem, Nishi Ku, Fukuoka 8190395, Japan

[2] Kyoto Univ, Inst Adv Energy, Uji, Kyoto 6110011, Japan

[3] Japan Sci & Technol Agcy JST, Precursory Res Embryon Sci & Technol PRESTO, Kawaguchi, Saitama 3320012, Japan

[4] Kyushu Univ, I2CNER, World Premier Int WPI Res Ctr, Nishi Ku, Fukuoka 8190395, Japan

[5] Japan Sci & Technol Agcy JST, CREST, Chiyoda Ku, Tokyo 1020075, Japan

来源：

NANOSCALE | 2014年 / 6卷 / 21期

关键词：

ELECTRONIC POTENTIALS; FLUORESCENCE; SPECTROSCOPY; SPECTRA; TEMPERATURE; MICROSCOPY; DEPENDENCE; CHARGE; RAMAN; N; M;

D O I：

10.1039/c4nr03945a

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The determination of electronic states of single-walled carbon nanotubes (SWNTs) has been a central issue in science and nanotechnology of carbon nanotubes. We here describe the oxidation and reduction potentials of a single SWNT determined by in situ photoluminescence (PL) spectroelectrochemical measurements. By PL imaging and single SWNT PL spectroscopy, the stepwise quenching behavior of the PL from a single (7,5) SWNT was detected as the outer-applied potentials increased. Based on the analysis of the obtained potential-dependent PL plots using the Nernst equation, the oxidation and reduction potentials of the (7,5) tube are successfully determined as 0.41 V and -0.38 V vs. Ag/AgCl, respectively, which shift from those of the bulk (7,5) SWNTs. We further observed a PL blueshift and narrowing of the line width as the external-applied potential to the single SWNT increases. The present results are important for understanding the electronic properties of a single (n,m) SWNT and its applications.

引用

页码：12798 / 12804

页数：7

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