Importance of diameter control on selective synthesis of semiconducting single-walled carbon nanotubes.

Li, Jinghua

Ke, Chung-Ting

Liu, Kaihui

Li, Pan

Liang, Sihang

Finkelstein, Gleb

Wang, Feng

Liu, Jie

2019-12-22T00:34:49Z

2019-12-22T00:34:49Z

2014-08-11

2019-12-22T00:34:45Z

The coexistence of semiconducting and metallic single-walled carbon nanotubes (SWNTs) during synthesis is one of the major bottlenecks that prevent their broad application for the next-generation nanoelectronics. Herein, we present more understanding and demonstration of the growth of highly enriched semiconducting SWNTs (s-SWNTs) with a narrow diameter distribution. An important fact discovered in our experiments is that the selective elimination of metallic SWNTs (m-SWNTs) from the mixed arrays grown on quartz is diameter-dependent. Our method emphasizes controlling the diameter distribution of SWNTs in a narrow range where m-SWNTs can be effectively and selectively etched during growth. In order to achieve narrow diameter distribution, uniform and stable Fe-W nanoclusters were used as the catalyst precursors. About 90% of as-prepared SWNTs fall into the diameter range 2.0-3.2 nm. Electrical measurement results on individual SWNTs confirm that the selectivity of s-SWNTs is ∼95%. The present study provides an effective strategy for increasing the purity of s-SWNTs via controlling the diameter distribution of SWNTs and adjusting the etchant concentration. Furthermore, by carefully comparing the chirality distributions of Fe-W-catalyzed and Fe-catalyzed SWNTs under different water vapor concentrations, the relationship between the diameter-dependent and electronic-type-dependent etching mechanisms was investigated.

1936-0851

1936-086X

https://hdl.handle.net/10161/19616

eng

American Chemical Society (ACS)

ACS nano

10.1021/nn503265g

Science & Technology

Physical Sciences

Technology

Chemistry, Multidisciplinary

Chemistry, Physical

Nanoscience & Nanotechnology

Materials Science, Multidisciplinary

Chemistry

Science & Technology - Other Topics

Materials Science

single-walled carbon nanotubes

semiconducting

diameter control

selective etching

Fe-W nanoclusters

FIELD-EFFECT TRANSISTORS

GROWTH

CATALYST

ARRAYS

REACTIVITY

DENSITY

VAPOR

CHEMISTRY

DEVICES

STRAIN

Importance of diameter control on selective synthesis of semiconducting single-walled carbon nanotubes.

Journal article

Finkelstein, Gleb|0000-0002-0883-0741

Liu, Jie|0000-0003-0451-6111

8564

8572

8

Trinity College of Arts & Sciences

Duke

Physics

Duke Institute for Brain Sciences

University Institutes and Centers

Institutes and Provost's Academic Units

Chemistry

Published

8