"Lock-and-Key" Geometry Effect of Patterned Surfaces: Wettability and Switching of Adhesive Force

被引：105

作者：

Huang, Xing-Jiu ^{[1
]}

Kim, Dong-Haan ^{[2
]}

Im, Maesoon ^{[1
]}

Lee, Joo-Hyung ^{[2
]}

Yoon, Jun-Bo ^{[2
]}

Choi, Yang-Kyu ^{[1
]}

机构：

[1] Korea Adv Inst Sci & Technol, Sch Elect Engn & Comp Sci, Nanooriented Bioelect Lab, Taejon 305701, South Korea

[2] Korea Adv Inst Sci & Technol, Sch Elect Engn & Comp Sci, Micronano Struct Lab 3D, Taejon 305701, South Korea

来源：

SMALL | 2009年 / 5卷 / 01期

关键词：

adhesive forces; geometry effects; superhydrophobicity; switches; SUPER-HYDROPHOBIC SURFACES; SUPERHYDROPHOBIC SURFACES; CONTACT ANGLES; POLYDIMETHYLSILOXANE; WATER; PDMS; POLY(DIMETHYLSILOXANE); HYSTERESIS; RECOVERY; PLASMA;

D O I：

10.1002/smll.200800649

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A strategy to create a superhydrophobic surface by employing microlens and microbowl arrays without a thin fluorinated carbon film coating was described. The wettability and switching of adhesive force was checked by fabricating PDMS microbowl arrays with imprinted inverse microlens structure following the lock-and-key domains. No distortion is observed on the array surface, suggesting that this approach eliminates significant drawbacks encountered with conventional bottom-up techniques. The variation of the contact angles measured at different sites imply that the PDMS microlens-arrayed surface has hydrophobity with a high adhesive force. The results also show that the 10×6 PDMS microbowl-arrayed surface exhibits perfect superhydrophobicity with a contact angle of approximately 164.6°, owing to the hollow structures in the surface.

引用

页码：90 / 94

页数：5

共 28 条

[1] CONTACT ANGLES AND WORK OF ADHESION [J].

ADAM, NK ;

LIVINGSTON, HK .

NATURE, 1958, 182 (4628) :128-128

[2] Self-cleaning surfaces - virtual realities [J].

Blossey, R .

NATURE MATERIALS, 2003, 2 (05) :301-306

[3] Hydrophilization and hydrophobic recovery of PDMS by oxygen plasma and chemical treatment - An SEM investigation [J].

Bodas, Dhananjay ;

Khan-Malek, Chantal .

SENSORS AND ACTUATORS B-CHEMICAL, 2007, 123 (01) :368-373

[4] Wettability of porous surfaces. [J].

Cassie, ABD ;

Baxter, S .

TRANSACTIONS OF THE FARADAY SOCIETY, 1944, 40 :0546-0550

[5] Creating long-lived superhydrophobic polymer surfaces through mechanically assembled monolayers [J].

Genzer, J ;

Efimenko, K .

SCIENCE, 2000, 290 (5499) :2130-2133

[6] Sticky superhydrophobic surface [J].

Guo, Zhi-Guang ;

Liu, Wei-Min .

APPLIED PHYSICS LETTERS, 2007, 90 (22)

[7] Multiple equilibrium droplet shapes and design criterion for rough hydrophobic surfaces [J].

He, B ;

Patankar, NA ;

Lee, J .

LANGMUIR, 2003, 19 (12) :4999-5003

[8] A one-step route to a perfectly ordered wafer-scale microbowl array for Sizedependent superhydrophobicity [J].

Nano-Oriented Bio-Electronic Lab., School of Electrical Engineering and Computer Science, Korea Advanced Institute of Science and Technology, Daejeon, 305-701, Korea, Republic of ;