Electrical potential induced switchable wettability of super-aligned carbon nanotube films

Electrical potential induced switchable wettability of super-aligned carbon nanotube films Article history: Controlling of the wettability of micro-nano scale surfaces not only plays important roles in basic sci- Received 2 June 2017 ence but also presents some significant applications in interference shielding materials, microfluidics Received in revised form 19 July 2017 and phase-change heat transfer enhancement, etc. Here, the superhydrophobic super-aligned carbon Accepted 10 August 2017 nanotube (SACNT) films are firstly obtained by the chemical vapor deposition method and the anneal- Available online 15 August 2017 ing process. Then their wettabilities are in-situ switched by the electrowetting strategy. Specifically, the fascinating transformation of superhydrophobicity to the superhydrophilicity is achieved by exerting Keywords: external DC voltages across the CNT-liquid interfaces, and the transitions of Cassie-to-Wenzel states are Carbon nanotube films observed on the multilayer SACNT films. In addition, the electrowetting induced salt absorption of the Superhydrophobicity porous SACNT is also reported here. Finally, the threshold voltages of the electrowetting behaviors for Superhydrophilicity different liquids on the SACNT films and unit capacitances across the CNT-liquid interfaces are obtained, Electrowetting Switchable wettability which reveal that the SACNT films have much more outstanding electrowetting properties than the previ- ously reported works. Our approach reported here demonstrates that the wettability of SACNT films could http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Applied Surface Science Elsevier

Electrical potential induced switchable wettability of super-aligned carbon nanotube films

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Publisher
Elsevier
Copyright
Copyright © 2017 Elsevier B.V.
ISSN
0169-4332
eISSN
1873-5584
D.O.I.
10.1016/j.apsusc.2017.08.082
Publisher site
See Article on Publisher Site

Abstract

Article history: Controlling of the wettability of micro-nano scale surfaces not only plays important roles in basic sci- Received 2 June 2017 ence but also presents some significant applications in interference shielding materials, microfluidics Received in revised form 19 July 2017 and phase-change heat transfer enhancement, etc. Here, the superhydrophobic super-aligned carbon Accepted 10 August 2017 nanotube (SACNT) films are firstly obtained by the chemical vapor deposition method and the anneal- Available online 15 August 2017 ing process. Then their wettabilities are in-situ switched by the electrowetting strategy. Specifically, the fascinating transformation of superhydrophobicity to the superhydrophilicity is achieved by exerting Keywords: external DC voltages across the CNT-liquid interfaces, and the transitions of Cassie-to-Wenzel states are Carbon nanotube films observed on the multilayer SACNT films. In addition, the electrowetting induced salt absorption of the Superhydrophobicity porous SACNT is also reported here. Finally, the threshold voltages of the electrowetting behaviors for Superhydrophilicity different liquids on the SACNT films and unit capacitances across the CNT-liquid interfaces are obtained, Electrowetting Switchable wettability which reveal that the SACNT films have much more outstanding electrowetting properties than the previ- ously reported works. Our approach reported here demonstrates that the wettability of SACNT films could

Journal

Applied Surface ScienceElsevier

Published: Jan 1, 2018

References

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