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

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 journal › Article › peer-review

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 pK_1/2 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 pK_1/2 values among different SWNTs tips, indicating the variations in the chemistry from tube to tube.

Original language	English (US)
Pages (from-to)	471
Number of pages	1
Journal	Kao Teng Hsueh Hsiao Hua Heush Hsueh Pao/ Chemical Journal of Chinese Universities
Volume	23
Issue number	3
State	Published - Mar 2002
Externally published	Yes

Keywords

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

ASJC Scopus subject areas

General Chemistry

Cite this

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

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.",

keywords = "Adhesion force, Force titration, Single-walled carbon nanotubes, Surface condensation, Tip chemistry",

author = "Yang, {Yan Lian} and Jin Zhang and Nan, {Xiao Lin} and Liu, {Zhong Fan}",

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T1 - Studies on the Dissociation Behavior of Carboxylic Groups at the Open End of Single-Walled Carbon Nanotubes by Tip Chemistry

AU - Yang, Yan Lian

AU - Zhang, Jin

AU - Nan, Xiao Lin

AU - Liu, Zhong Fan

PY - 2002/3

Y1 - 2002/3

N2 - 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.

AB - 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.

KW - Adhesion force

KW - Force titration

KW - Single-walled carbon nanotubes

KW - Surface condensation

KW - Tip chemistry

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

Abstract

Keywords

ASJC Scopus subject areas

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