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http://dx.doi.org/10.5370/KIEE.2014.63.5.671

Fabrication of Hydrophilic Poly(dimethylsiloxane)with Periodic Wrinkling Surface and Its Application  

Lee, Dong-Guk (Dept. of Mechanical Engineering, Inje University)
Oh, Chang-Kyu (Dept. of Mechanical Engineering, Inje University)
Yang, Sung-Ho (Inje University)
Han, Seung-Jin (Inje University)
Jeong, Ok-Chan (Dept. of Mechanical Engineering, Inje University)
Publication Information
The Transactions of The Korean Institute of Electrical Engineers / v.63, no.5, 2014 , pp. 671-675 More about this Journal
Abstract
This paper presents a fabrication of hydrophilic Poly(dimethylsiloxane) (PDMS) with periodic wrinkling surface. The proposed periodic wrinkling surface was fabricated using the sequential processes of typical curing process of PDMS, cutting process, platinum deposition process, and wrinkling transfer process. The surface morphology of the fabricated wrinkling surface was observed by using optical and dynamic atomic force microscopy and discussed. The measured period and amplitude of wrinkling was about $2.2{\mu}m$ and $0.31{\mu}m$, respectively. And, the contact angles of water droplets on the wrinkled surface were measured in order to understand effect of the wrinkling surface on surface modification of hydrophobic PDMS. Our new finding was that the proposed wrinkling surface was hydrophilic and the measured contact angle was about $62^{\circ}$. Moreover, it was found out from the simple cell culture test that the fabricated wrinkling surface was more effective for cell spreading and adhesion than the case of native PDMS substrate.
Keywords
Hydrophilic; Cell spreading; Cell adhesion; PDMS; Wrinkling;
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