Effect of degassing on the aggregation of carbon nanotubes dispersed in water

C. J. Chen; J. R. Huang; I. S. Hwang; H. J. Choi; P. Y. Lai; C. K. Chan

doi:10.1209/0295-5075/120/16004

Effect of degassing on the aggregation of carbon nanotubes dispersed in water

C. J. Chen, J. R. Huang^*, I. S. Hwang, H. J. Choi, P. Y. Lai, C. K. Chan

^*Corresponding author for this work

Department of Physics

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

Dynamic light scattering (DLS) along with centrifugation and shaking tests reveal that dissolved gases can significantly affect the aggregation behavior of carbon nanotubes (CNTs) dispersed in water. The CNTs in non-degassed samples form loose, stable networks having the DLS result reminiscent of semidilute polymer solutions, whereas the CNTs in degassed samples aggregate to form Brownian colloids that sediment quickly. Interestingly, the CNTs dispersed in acetone, with or without degassing, also behave like semidilute polymers in DLS experiments. We propose a surface nanobubble-assisted mechanism to explain the observed aggregation behaviors. Our work signifies that dissolved gases may play an important role in determining hydrophobicity and biomolecular functions in aqueous environments.

Original language	English
Article number	16004
Journal	Europhysics Letters
Volume	120
Issue number	1
DOIs	https://doi.org/10.1209/0295-5075/120/16004
Publication status	Published - 2017 Oct

ASJC Scopus subject areas

General Physics and Astronomy

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title = "Effect of degassing on the aggregation of carbon nanotubes dispersed in water",

abstract = "Dynamic light scattering (DLS) along with centrifugation and shaking tests reveal that dissolved gases can significantly affect the aggregation behavior of carbon nanotubes (CNTs) dispersed in water. The CNTs in non-degassed samples form loose, stable networks having the DLS result reminiscent of semidilute polymer solutions, whereas the CNTs in degassed samples aggregate to form Brownian colloids that sediment quickly. Interestingly, the CNTs dispersed in acetone, with or without degassing, also behave like semidilute polymers in DLS experiments. We propose a surface nanobubble-assisted mechanism to explain the observed aggregation behaviors. Our work signifies that dissolved gases may play an important role in determining hydrophobicity and biomolecular functions in aqueous environments.",

author = "Chen, {C. J.} and Huang, {J. R.} and Hwang, {I. S.} and Choi, {H. J.} and Lai, {P. Y.} and Chan, {C. K.}",

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T1 - Effect of degassing on the aggregation of carbon nanotubes dispersed in water

AU - Chen, C. J.

AU - Huang, J. R.

AU - Hwang, I. S.

AU - Choi, H. J.

AU - Lai, P. Y.

AU - Chan, C. K.

PY - 2017/10

Y1 - 2017/10

N2 - Dynamic light scattering (DLS) along with centrifugation and shaking tests reveal that dissolved gases can significantly affect the aggregation behavior of carbon nanotubes (CNTs) dispersed in water. The CNTs in non-degassed samples form loose, stable networks having the DLS result reminiscent of semidilute polymer solutions, whereas the CNTs in degassed samples aggregate to form Brownian colloids that sediment quickly. Interestingly, the CNTs dispersed in acetone, with or without degassing, also behave like semidilute polymers in DLS experiments. We propose a surface nanobubble-assisted mechanism to explain the observed aggregation behaviors. Our work signifies that dissolved gases may play an important role in determining hydrophobicity and biomolecular functions in aqueous environments.

AB - Dynamic light scattering (DLS) along with centrifugation and shaking tests reveal that dissolved gases can significantly affect the aggregation behavior of carbon nanotubes (CNTs) dispersed in water. The CNTs in non-degassed samples form loose, stable networks having the DLS result reminiscent of semidilute polymer solutions, whereas the CNTs in degassed samples aggregate to form Brownian colloids that sediment quickly. Interestingly, the CNTs dispersed in acetone, with or without degassing, also behave like semidilute polymers in DLS experiments. We propose a surface nanobubble-assisted mechanism to explain the observed aggregation behaviors. Our work signifies that dissolved gases may play an important role in determining hydrophobicity and biomolecular functions in aqueous environments.

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Effect of degassing on the aggregation of carbon nanotubes dispersed in water

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