Studies on the Dissociation Behavior of Carboxylic Groups at the Open End of Single-Walled Carbon Nanotubes by Tip Chemistry

Yan Lian Yang, Jin Zhang, Xiao Lin Nan, Zhong Fan Liu

Research output: Contribution to journalArticle

1 Scopus citations

Abstract

We have demonstrated here the dissociation behavior of carboxylic groups at the open end of Single-Walled Carbon Nanotubes(SWNTs) by tip chemistry. SWNTs were cut into short pipes by acid oxidation and thus carboxylic groups were produced at the end of the tubes. The SWNTs can be immobilized onto AFM tips by surface condensation between amino-terminated self-assembled monolayers (SAMs) on AFM tips and carboxylic groups at the end of SWNTs. The pK1/2 value of the SWNTs was then obtained from the force titration measurements of the SWNTs tips vs. hydroxyl-terminated SAMs. The results showed a different force titration behaviour and variable pK1/2 values among different SWNTs tips, indicating the variations in the chemistry from tube to tube.

Original languageEnglish (US)
Number of pages1
JournalKao Teng Hsueh Hsiao Hua Heush Hsueh Pao/ Chemical Journal of Chinese Universities
Volume23
Issue number3
StatePublished - Mar 1 2002

Keywords

  • Adhesion force
  • Force titration
  • Single-walled carbon nanotubes
  • Surface condensation
  • Tip chemistry

ASJC Scopus subject areas

  • Chemistry(all)

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