Fabrication of polydimethylsiloxane microlens arrays by surface tension induced liquid separation

Lee, Kyounggun; Jang, Yun Ho; Jin, Jong-Sik; Ji, Chang-Hyeon; Kim, Yong Kweon

doi:10.1049/mnl.2011.0377

Cited by 5 publications

(1 citation statement)

References 19 publications

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“…Also polydimethylsiloxane (PDMS) microlens arrays can be fabricated by surface tension induced liquid separation [27] .This method starts with dipping and withdrawing of cylindrical post arrays in PDMS prepolymer mixture to create a liquid PDMS on the post array. Then a lens shape is automatically formed by surface tension.…”

Section: Microlens Systemmentioning

confidence: 99%

Integrated on-chip lens applied to microfluidic chips

Zhao

et al. 2012

SPIE Proceedings

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The optical signal on microfluidic chip is hard to be collected. To improve the excitation power and collection efficiency, we introduced a simple, inexpensive fabrication method to increase the couple rate of optical fiber. This small element is a polymer and air integrated microlens that can improve the optical signal detection. Compared to other established protocols, this procedure allows a simple, miniaturizing and inexpensive microlens fabrication with high reproducibility.The air microlens was produced by using direct lithograph of SU-8 resist to reduce the beam divergence of optical fiber.Owing to its ability to achieve customized microlens for specific applications, this technique can be used in a variety of applications, such as a blood cell counting system based on microfluidic chip.

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Section: Microlens Systemmentioning

confidence: 99%

Integrated on-chip lens applied to microfluidic chips

Zhao

et al. 2012

SPIE Proceedings

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Influence of surface roughness on wet adhesion of biomimetic adhesive pads with planar microstructures

Wang

2012

Micro Nano Lett.

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Controlled volume transfer and lens shape formation by liquid bridge disconnection

Jang

Lee

Kim

2012

Applied Physics Letters

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A liquid bridge was created and disconnected to transfer a controlled volume of mixture to a cylindrical post for the formation of parabolic lens shapes. We investigated a transferred volume and the focal length of the lens shape in terms of four parameters: post radius, withdrawal speed, dipping depth, and mixture thickness. The presented method is simple and flexible to transfer a pre-analyzed volume and subsequently to fabricate a lens shape on post structures, which can be beneficial to implementing self-aligned and smooth lenses integrated in micro structures.

show abstract

Fabrication of polydimethylsiloxane microlens arrays by surface tension induced liquid separation

Cited by 5 publications

References 19 publications

Integrated on-chip lens applied to microfluidic chips

Integrated on-chip lens applied to microfluidic chips

Influence of surface roughness on wet adhesion of biomimetic adhesive pads with planar microstructures

Controlled volume transfer and lens shape formation by liquid bridge disconnection

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