Bistable nature of the hydrophobic contact angle on rough surfaces

Bo He; Neelesh A. Patankar; Junghoon Lee

doi:10.1115/imece2003-41536

Bistable nature of the hydrophobic contact angle on rough surfaces

Bo He^*, Neelesh A. Patankar, Junghoon Lee

^*Corresponding author for this work

Mechanical Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

1 Scopus citations

Abstract

This paper studies the bistable nature of the hydrophobic contact angle on the rough surfaces. It was experimentally shown that a droplet of liquid can form two different contact angles on a surface that has roughness patterns. External disturbances can cause a transition between the two different energy states. This paper verifies the theoretical prediction by matching experiments and establishes a design criterion for a robust hydrophobic rough surface on which the contact angle will not change due to external disturbances. This fact is critical in microfluidic applications, where a rough surface is used for applications based on wettability amplification.

Original language	English (US)
Title of host publication	Micro-Electro-Mechanical Systems (MEMS) - 2003
Publisher	American Society of Mechanical Engineers
Pages	673-677
Number of pages	5
ISBN (Print)	0791837211, 9780791837214
DOIs	https://doi.org/10.1115/imece2003-41536
State	Published - 2003
Event	2003 ASME International Mechanical Engineering Congress - Washington, DC, United States Duration: Nov 15 2003 → Nov 21 2003

Publication series

Name	American Society of Mechanical Engineers, Micro-Electromechanical Systems Division Publication (MEMS)
Volume	5

Other

Other	2003 ASME International Mechanical Engineering Congress
Country/Territory	United States
City	Washington, DC
Period	11/15/03 → 11/21/03

Keywords

Hydrophobic contact angle
Rough surface

ASJC Scopus subject areas

Engineering(all)

Access to Document

10.1115/imece2003-41536

Cite this

He, B., Patankar, N. A., & Lee, J. (2003). Bistable nature of the hydrophobic contact angle on rough surfaces. In Micro-Electro-Mechanical Systems (MEMS) - 2003 (pp. 673-677). (American Society of Mechanical Engineers, Micro-Electromechanical Systems Division Publication (MEMS); Vol. 5). American Society of Mechanical Engineers. https://doi.org/10.1115/imece2003-41536

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title = "Bistable nature of the hydrophobic contact angle on rough surfaces",

abstract = "This paper studies the bistable nature of the hydrophobic contact angle on the rough surfaces. It was experimentally shown that a droplet of liquid can form two different contact angles on a surface that has roughness patterns. External disturbances can cause a transition between the two different energy states. This paper verifies the theoretical prediction by matching experiments and establishes a design criterion for a robust hydrophobic rough surface on which the contact angle will not change due to external disturbances. This fact is critical in microfluidic applications, where a rough surface is used for applications based on wettability amplification.",

keywords = "Hydrophobic contact angle, Rough surface",

author = "Bo He and Patankar, {Neelesh A.} and Junghoon Lee",

year = "2003",

doi = "10.1115/imece2003-41536",

language = "English (US)",

isbn = "0791837211",

series = "American Society of Mechanical Engineers, Micro-Electromechanical Systems Division Publication (MEMS)",

publisher = "American Society of Mechanical Engineers",

pages = "673--677",

booktitle = "Micro-Electro-Mechanical Systems (MEMS) - 2003",

note = "2003 ASME International Mechanical Engineering Congress ; Conference date: 15-11-2003 Through 21-11-2003",

}

He, B, Patankar, NA & Lee, J 2003, Bistable nature of the hydrophobic contact angle on rough surfaces. in Micro-Electro-Mechanical Systems (MEMS) - 2003. American Society of Mechanical Engineers, Micro-Electromechanical Systems Division Publication (MEMS), vol. 5, American Society of Mechanical Engineers, pp. 673-677, 2003 ASME International Mechanical Engineering Congress, Washington, DC, United States, 11/15/03. https://doi.org/10.1115/imece2003-41536

Bistable nature of the hydrophobic contact angle on rough surfaces. / He, Bo; Patankar, Neelesh A.; Lee, Junghoon.
Micro-Electro-Mechanical Systems (MEMS) - 2003. American Society of Mechanical Engineers, 2003. p. 673-677 (American Society of Mechanical Engineers, Micro-Electromechanical Systems Division Publication (MEMS); Vol. 5).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

TY - GEN

T1 - Bistable nature of the hydrophobic contact angle on rough surfaces

AU - He, Bo

AU - Patankar, Neelesh A.

AU - Lee, Junghoon

PY - 2003

Y1 - 2003

N2 - This paper studies the bistable nature of the hydrophobic contact angle on the rough surfaces. It was experimentally shown that a droplet of liquid can form two different contact angles on a surface that has roughness patterns. External disturbances can cause a transition between the two different energy states. This paper verifies the theoretical prediction by matching experiments and establishes a design criterion for a robust hydrophobic rough surface on which the contact angle will not change due to external disturbances. This fact is critical in microfluidic applications, where a rough surface is used for applications based on wettability amplification.

AB - This paper studies the bistable nature of the hydrophobic contact angle on the rough surfaces. It was experimentally shown that a droplet of liquid can form two different contact angles on a surface that has roughness patterns. External disturbances can cause a transition between the two different energy states. This paper verifies the theoretical prediction by matching experiments and establishes a design criterion for a robust hydrophobic rough surface on which the contact angle will not change due to external disturbances. This fact is critical in microfluidic applications, where a rough surface is used for applications based on wettability amplification.

KW - Hydrophobic contact angle

KW - Rough surface

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SN - 9780791837214

T3 - American Society of Mechanical Engineers, Micro-Electromechanical Systems Division Publication (MEMS)

SP - 673

EP - 677

BT - Micro-Electro-Mechanical Systems (MEMS) - 2003

PB - American Society of Mechanical Engineers

T2 - 2003 ASME International Mechanical Engineering Congress

Y2 - 15 November 2003 through 21 November 2003

ER -

Bistable nature of the hydrophobic contact angle on rough surfaces

Abstract

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Keywords

ASJC Scopus subject areas

Access to Document

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