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Dropwise condensation on superhydrophobic surfaces with two-tier roughness

Publication ,  Journal Article
Chen, CH; Cai, Q; Tsai, C; Chen, CL; Xiong, G; Yu, Y; Ren, Z
Published in: Applied Physics Letters
May 21, 2007

Dropwise condensation can enhance heat transfer by an order of magnitude compared to film condensation. Superhydrophobicity appears ideal to promote continued dropwise condensation which requires rapid removal of condensate drops; however, such promotion has not been reported on engineered surfaces. This letter reports continuous dropwise condensation on a superhydrophobic surface with short carbon nanotubes deposited on micromachined posts, a two-tier texture mimicking lotus leaves. On such micro-/nanostructured surfaces, the condensate drops prefer the Cassie state which is thermodynamically more stable than the Wenzel state. With a hexadecanethiol coating, superhydrophobicity is retained during and after condensation and rapid drop removal is enabled. © 2007 American Institute of Physics.

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Published In

Applied Physics Letters

DOI

ISSN

0003-6951

Publication Date

May 21, 2007

Volume

90

Issue

17

Related Subject Headings

  • Applied Physics
  • 51 Physical sciences
  • 40 Engineering
  • 10 Technology
  • 09 Engineering
  • 02 Physical Sciences
 

Citation

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Chen, C. H., Cai, Q., Tsai, C., Chen, C. L., Xiong, G., Yu, Y., & Ren, Z. (2007). Dropwise condensation on superhydrophobic surfaces with two-tier roughness. Applied Physics Letters, 90(17). https://doi.org/10.1063/1.2731434
Chen, C. H., Q. Cai, C. Tsai, C. L. Chen, G. Xiong, Y. Yu, and Z. Ren. “Dropwise condensation on superhydrophobic surfaces with two-tier roughness.” Applied Physics Letters 90, no. 17 (May 21, 2007). https://doi.org/10.1063/1.2731434.
Chen CH, Cai Q, Tsai C, Chen CL, Xiong G, Yu Y, et al. Dropwise condensation on superhydrophobic surfaces with two-tier roughness. Applied Physics Letters. 2007 May 21;90(17).
Chen, C. H., et al. “Dropwise condensation on superhydrophobic surfaces with two-tier roughness.” Applied Physics Letters, vol. 90, no. 17, May 2007. Scopus, doi:10.1063/1.2731434.
Chen CH, Cai Q, Tsai C, Chen CL, Xiong G, Yu Y, Ren Z. Dropwise condensation on superhydrophobic surfaces with two-tier roughness. Applied Physics Letters. 2007 May 21;90(17).

Published In

Applied Physics Letters

DOI

ISSN

0003-6951

Publication Date

May 21, 2007

Volume

90

Issue

17

Related Subject Headings

  • Applied Physics
  • 51 Physical sciences
  • 40 Engineering
  • 10 Technology
  • 09 Engineering
  • 02 Physical Sciences