Microelectromechanical Systems (MEMS)

Hydrophobic marking line used to eliminate the edge effect in a microfluidic point-of-care testing device

[+] Author Affiliations
Li Jingmin, Li Xia, Liu Ziyang, Liang Chao

Dalian University of Technology, Key Laboratory for Micro/Nano Technology and System of Liaoning Province, No. 2, Linggong Road, Ganjingzi District, Dalian, Liaoning, China

Liu Chong

Dalian University of Technology, Key Laboratory for Micro/Nano Technology and System of Liaoning Province, No. 2, Linggong Road, Ganjingzi District, Dalian, Liaoning, China

Dalian University of Technology, Key Laboratory for Precision and Non-Traditional Machining Technology of Ministry of Education, No. 2, Linggong Road, Ganjingzi District, Dalian, Liaoning, China

J. Micro/Nanolith. MEMS MOEMS. 16(1), 015001 (Jan 02, 2017). doi:10.1117/1.JMM.16.1.015001
History: Received July 17, 2016; Accepted November 30, 2016
Text Size: A A A

Abstract.  The traversal rate for the liquid medium near a point-of-care testing (POCT) device microfluidic channel edge is faster than that through the body of the channel, which makes the fluid front meniscus becomes concave rather than convex or flat. The concave front is unwished due to its influences on quantitative analysis accuracy and the possibility to generate air bubbles. Here, a unique method, named hydrophobic marking line, is demonstrated. This method used a soft pen with hydrophobic ink to draw two lines along the edges of the channel of a POCT device. Results have shown that the marking lines will eliminate the edge effects and generate convex liquid front. The curvature of the liquid front can be changed by adjusting the marking line width or ink solutions.

Figures in this Article
© 2016 Society of Photo-Optical Instrumentation Engineers

Topics

Laser marking

Citation

Li Jingmin ; Li Xia ; Liu Ziyang ; Liang Chao and Liu Chong
"Hydrophobic marking line used to eliminate the edge effect in a microfluidic point-of-care testing device", J. Micro/Nanolith. MEMS MOEMS. 16(1), 015001 (Jan 02, 2017). ; http://dx.doi.org/10.1117/1.JMM.16.1.015001


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