General rules for selective growth of enriched semiconducting single walled carbon nanotubes with water vapor as in situ etchant.

Journal Article (Journal Article)

The presence of metallic nanotubes in as-grown single walled carbon nanotubes (SWNTs) is the major bottleneck for their applications in field-effect transistors. Herein, we present a method to synthesize enriched, semiconducting nanotube arrays on quartz substrate. It was discovered that introducing appropriate amounts of water could effectively remove the metallic nanotubes and significantly enhance the density of SWNT arrays. More importantly, we proposed and confirmed that the high growth selectivity originates from the etching effect of water and the difference in the chemical reactivities of metallic and semiconducting nanotubes. Three important rules were summarized for achieving a high selectivity in growing semiconducting nanotubes by systematically investigating the relationship among water concentration, carbon feeding rate, and the percentage of semiconducting nanotubes in the produced SWNT arrays. Furthermore, these three rules can be applied to the growth of random SWNT networks on silicon wafers.

Full Text

Duke Authors

Cited Authors

  • Zhou, W; Zhan, S; Ding, L; Liu, J

Published Date

  • August 16, 2012

Published In

Volume / Issue

  • 134 / 34

Start / End Page

  • 14019 - 14026

PubMed ID

  • 22873685

Pubmed Central ID

  • 22873685

Electronic International Standard Serial Number (EISSN)

  • 1520-5126

International Standard Serial Number (ISSN)

  • 0002-7863

Digital Object Identifier (DOI)

  • 10.1021/ja3038992


  • eng