|
1
|
Feng H, Yi Z, Yang R, Qin X, Shen S, Zeng W, Shui L, Zhou G, Zhang C. Designing Splicing Digital Microfluidics Chips Based on Polytetrafluoroethylene Membrane. Micromachines (Basel) 2020; 11:mi11121067. [PMID: 33266119 PMCID: PMC7760364 DOI: 10.3390/mi11121067] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Revised: 11/26/2020] [Accepted: 11/29/2020] [Indexed: 11/17/2022]
Abstract
As a laboratory-on-a-chip application tool, digital microfluidics (DMF) technology is widely used in DNA-based applications, clinical diagnosis, chemical synthesis, and other fields. Additional components (such as heaters, centrifuges, mixers, etc.) are required in practical applications on DMF devices. In this paper, a DMF chip interconnection method based on electrowetting-on-dielectric (EWOD) was proposed. An open modified slippery liquid-infused porous surface (SLIPS) membrane was used as the dielectric-hydrophobic layer material, which consisted of polytetrafluoroethylene (PTFE) membrane and silicone oil. Indium tin oxide (ITO) glass was used to manufacture the DMF chip. In order to test the relationship between the splicing gap and droplet moving, the effect of the different electrodes on/off time on the minimum driving voltage when the droplet crossed a splicing gap was investigated. Then, the effects of splicing gaps of different widths, splicing heights, and electrode misalignments were investigated, respectively. The experimental results showed that a driving voltage of 119 V was required for a droplet to cross a splicing gap width of 300 μm when the droplet volume was 10 μL and the electrode on/off time was 600 ms. At the same time, the droplet could climb a height difference of 150 μm with 145 V, and 141 V was required when the electrode misalignment was 1000 μm. Finally, the minimum voltage was not obviously changed, when the same volume droplet with different aqueous solutions crossed the splicing gap, and the droplet could cross different chip types. These splicing solutions show high potential for simultaneous detection of multiple components in human body fluids.
Collapse
Affiliation(s)
- Haoqiang Feng
- College of Electron and Information, University of Electronic Science and Technology of China, Zhongshan Institute, Zhongshan 528402, China; (H.F.); (W.Z.); (L.S.); (C.Z.)
- South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China; (R.Y.); (X.Q.); (S.S.); (G.Z.)
| | - Zichuan Yi
- College of Electron and Information, University of Electronic Science and Technology of China, Zhongshan Institute, Zhongshan 528402, China; (H.F.); (W.Z.); (L.S.); (C.Z.)
- Correspondence: ; Tel.: +86-0760-8831-4612
| | - Ruizhi Yang
- South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China; (R.Y.); (X.Q.); (S.S.); (G.Z.)
| | - Xiaofeng Qin
- South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China; (R.Y.); (X.Q.); (S.S.); (G.Z.)
| | - Shitao Shen
- South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China; (R.Y.); (X.Q.); (S.S.); (G.Z.)
| | - Wenjun Zeng
- College of Electron and Information, University of Electronic Science and Technology of China, Zhongshan Institute, Zhongshan 528402, China; (H.F.); (W.Z.); (L.S.); (C.Z.)
- South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China; (R.Y.); (X.Q.); (S.S.); (G.Z.)
| | - Lingling Shui
- College of Electron and Information, University of Electronic Science and Technology of China, Zhongshan Institute, Zhongshan 528402, China; (H.F.); (W.Z.); (L.S.); (C.Z.)
- South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China; (R.Y.); (X.Q.); (S.S.); (G.Z.)
| | - Guofu Zhou
- South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China; (R.Y.); (X.Q.); (S.S.); (G.Z.)
| | - Chongfu Zhang
- College of Electron and Information, University of Electronic Science and Technology of China, Zhongshan Institute, Zhongshan 528402, China; (H.F.); (W.Z.); (L.S.); (C.Z.)
| |
Collapse
|