A facile strategy to integrate robust porous aluminum foil into microfluidic chip for sorting particles |
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Authors: | Yi-Shan Zeng Hua Fan Bing Xu Zhen Zhang Fei-Fei Ren Chen Zhou Si-Zhu Wu Yan-Lei Hu Wu-Lin Zhu Ya-Hui Su Jia-Ru Chu Jia-Wen Li Guo-Qiang Li Dong Wu |
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Affiliation: | 1.CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Precision Machinery and Precision Instrumentation,University of Science and Technology of China,Hefei,People’s Republic of China;2.Department of Mechanical and Electronic Engineering,Hefei University of Technology,Hefei,People’s Republic of China;3.School of Electrical Engineering and Automation,Anhui University,Hefei,People’s Republic of China;4.School of Instrument Science and Opto-Electronics Engineering,Hefei University of Technology,Hefei,People’s Republic of China |
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Abstract: | High efficiency integration of functional microdevices into microchips is crucial for broad microfluidic applications. Here, a device-insertion and pressure sealing method was proposed to integrate robust porous aluminum foil into a microchannel for microchip functionalization which demonstrate the advantage of high efficient foil microfabrication and facile integration into the microfluidic chip. The porous aluminum foil with large area (10 × 10 mm2) was realized by one-step femtosecond laser perforating technique within few minutes and its pores size could be precisely controlled from 3 μm to millimeter scale by adjusting the laser pulse energy and pulse number. To verify the versatility and flexibility of this method, two kinds of different microchips were designed and fabricated. The vertical-sieve 3D microfluidic chip can separate silicon dioxide (SiO2) microspheres of two different sizes (20 and 5 μm), whereas the complex stacking multilayered structures (sandwich-like) microfluidic chip can be used to sort three different kinds of SiO2 particles (20, 10 and 5 μm) with ultrahigh separation efficiency of more than 92%. Furthermore, these robust filters can be reused via cleaning by backflow (mild clogging) or disassembling (heavy clogging). |
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