Reaction products of Co catalysts in ethanol-chemical-vapor-deposition ambient at low-pressure studied by in situ X-ray photoelectron spectroscopy

被引：7

作者：

Maeda, Fumihiko

Suzuki, Satoru

Kobayashi, Yoshihiro

Takagi, Daisuke

Homma, Yoshikazu

机构：

[1] NTT Corp, NTT Basic Res Labs, Atsugi, Kanagawa 2430198, Japan

[2] JST, CREST, Atsugi, Kanagawa 2430198, Japan

[3] Tokyo Univ Sci, Dept Phys, Shinjuku Ku, Tokyo 1628601, Japan

[4] JST, CREST, Shinjuku Ku, Tokyo 1628601, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS | 2007年 / 46卷 / 4-7期

关键词：

carbon nanotubes; catalysts; chemical state; in situ analysis; X-ray photoelectron spectroscopy;

D O I：

10.1143/JJAP.46.L148

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We succeeded in growing carbon nanotubes in a photoelectron spectroscopy analysis system using thermal chemical vapor deposition and analyzed the chemical states of the Co catalysts by in situ X-ray photoelectron spectroscopy before and after the growth. The carbon nanotubes were grown in an ethanol ambient at about 4 x 10(-2) Torr, a relatively low pressure that was used because we needed to subsequently measure photoelectrons under ultrahigh vacuum. We found that almost all of the Co particles are metallic after the growth. This shows that the metallic state is stable for Co under low-pressure ethanol ambient in our growth condition for carbon nanotubes.

引用

收藏

页码：L148 / L150

页数：3

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