Ordered surface crack patterns in situ formed under confinement on fluidic microchannel boundaries in polydimethylsiloxane

Yang Bu; Sheng Ni; Levent Yobas

doi:10.1039/D0LC01131B

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Ordered surface crack patterns in situ formed under confinement on fluidic microchannel boundaries in polydimethylsiloxane†

Yang Bu,^a Sheng Ni^a and Levent Yobas

*^ab

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* Corresponding authors

^a Department of Electronic and Computer Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong SAR, China
E-mail: eelyobas@ust.hk

^b Division of Biomedical Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong SAR, China

Abstract

We present ordered surface crack patterns discovered in microfluidic channels/chambers in polydimethylsiloxane (PDMS). The cracks are formed in situ under confinement due to compression applied following an oxygen plasma step in a soft lithography process. The crack patterns are noticeable only after fluorescent labeling and vary with fluidic layout as well as material compliance.

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Article information

DOI: https://doi.org/10.1039/D0LC01131B
Article type: Communication
Submitted: 09 Nov 2020
Accepted: 21 Jan 2021
First published: 22 Jan 2021

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Lab Chip, 2021,21, 668-673

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Ordered surface crack patterns in situ formed under confinement on fluidic microchannel boundaries in polydimethylsiloxane

Y. Bu, S. Ni and L. Yobas, Lab Chip, 2021, 21, 668 DOI: 10.1039/D0LC01131B

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Ordered surface crack patterns in situ formed under confinement on fluidic microchannel boundaries in polydimethylsiloxane†

Abstract

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Ordered surface crack patterns in situ formed under confinement on fluidic microchannel boundaries in polydimethylsiloxane

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