期刊
LAB ON A CHIP
卷 9, 期 15, 页码 2169-2175出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/b904153b
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资金
- Korea government (MEST) [2008-05446]
- Seoul RBD program [NT070084]
- Ministry of Knowledge Economy
We demonstrate the microfluidic sorting of directionally oriented (anisotropic) microstructures by their orientational state in solution using the concept of railed microfluidics. After being injected into a microfluidic channel, the microstructures rotate and flip in various directions. In order to sort microstructures in an organized way, we designed the microstructures and the microchannel to allow for orientation-based control of microstructure movement. In order to sort microstructures based on their rotation, we used a wedge shaped fin on the microstructures and a Y-shaped railed microfluidic channel. For sorting flipped particles, we use a double-railed microfluidic channel that has grooves on both its top and bottom surfaces. By integrating the two sorting methods we demonstrated high throughput, autonomous sorting into four different orientational states: unrotated-unflipped, rotated-unflipped, unrotated-flipped, and rotated-flipped. Here we not only demonstrate orientational assembly of directionally dependent microstructures, but also present design considerations for future work.
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