Observation of water confined in nanometer channels of closed carbon nanotubes

Date

2004-11-01

Author

Naguib, N
Ye, HH
Gogotsi, Y
Güvenç Yazıcıoğlu, Almıla
Megaridis, CM
Yoshimura, M

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We present a method to fill 2-5-nm-diameter channels of closed multiwalled carbon nanotubes (MWNT) with an aqueous fluid and perform in situ high-resolution observations of fluid dynamic behaviour in this confined system. Transmission electron microscope (TEM) observations confirm the successful filling of two types of MWNTs and reveal disordered gas/liquid interfaces contrasting the smooth curved menisci visualized previously in MWNT with diameter above 10 nm. Electron energy loss spectroscopy (EELS) and energy dispersive spectrometry (EDS) analyses, along with TEM simulation, indicate the presence of water in MWNT. A wet-dry transition on the nanometer scale is also demonstrated by means of external heating. The results suggest that when ultrathin channels such as carbon nanotubes contain water, fluid mobility is greatly retarded compared to that on the macroscale. The present findings pose new challenges for modeling and device development work in this area.

URI

https://hdl.handle.net/11511/93855

Journal

NANO LETTERS

DOI

https://doi.org/10.1021/nl0484907

Collections

Department of Mechanical Engineering, Article

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Citation Formats

N. Naguib, H. Ye, Y. Gogotsi, A. Güvenç Yazıcıoğlu, C. Megaridis, and M. Yoshimura, “Observation of water confined in nanometer channels of closed carbon nanotubes,” NANO LETTERS, vol. 4, no. 11, pp. 2237–2243, 2004, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/93855.