Chirality specific and spatially uniform synthesis of single-walled carbon nanotubes from a sputtered Co-W bimetallic catalyst

被引：58

作者：

An, Hua ^{[1
]}

Kumamoto, Akihito ^{[2
]}

Takezaki, Hiroki ^{[1
]}

Ohyama, Shinnosuke ^{[1
]}

Qian, Yang ^{[1
]}

Inoue, Taiki ^{[1
]}

Ikuhara, Yuichi ^{[2
]}

Chiashi, Shohei ^{[1
]}

Xiang, Rong ^{[1
]}

Maruyama, Shigeo ^{[1
,3
]}

机构：

[1] Univ Tokyo, Dept Mech Engn, Tokyo 1138656, Japan

[2] Univ Tokyo, Inst Engn Innovat, Tokyo 1138656, Japan

[3] Natl Inst Adv Ind Sci & Technol, Energy NanoEngn Lab, Tsukuba, Ibaraki 3058564, Japan

来源：

NANOSCALE | 2016年 / 8卷 / 30期

关键词：

SELECTIVE SYNTHESIS; GROWTH; SPECTROSCOPY; ALCOHOL;

D O I：

10.1039/c6nr02749k

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Synthesis of single-walled carbon nanotubes (SWNTs) with well-defined atomic arrangements has been widely recognized in the past few decades as the biggest challenge in the SWNT community, and has become a bottleneck for the application of SWNTs in nano-electronics. Here, we report a selective synthesis of (12, 6) SWNTs with an enrichment of 50%-70% by chemical vapor deposition (CVD) using sputtered Co-W as a catalyst. This is achieved under much milder reduction and growth conditions than those in the previous report using transition-metal molecule clusters as catalyst precursors (Nature, 2014, 510, 522). Meanwhile, in-plane transmission electron microscopy unambiguously identified an intermediate structure of Co6W6C, which is strongly associated with selective growth. However, most of the W atoms disappear after a 5 min CVD growth, which implies that anchoring W may be important in this puzzling Co-W system.

引用

页码：14523 / 14529

页数：7

共 31 条

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