Point-plane electrode system and method for micro-fluid drive by using the system

A point-surface electrode and surface electrode technology, applied in the field of microfluidic chips, can solve the problem that AC electrodynamics cannot explain the microfluidic flow phenomenon, and achieve the effects of obvious fluid driving speed, simple overall structure and low cost.

Inactive Publication Date: 2011-10-26
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a point-surface electrode system and a method for microfluidic driving using the system, so as to solve the problem that AC electroosmotic microfluidic driving can only rely on the electric double layer theory, while AC electrodynamics cannot explain The problem of microfluidic flow phenomena

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  • Point-plane electrode system and method for micro-fluid drive by using the system
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  • Point-plane electrode system and method for micro-fluid drive by using the system

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specific Embodiment approach 1

[0010] Specific implementation mode one: combine Figure 1-Figure 3 To illustrate this embodiment, the point-surface electrode system of this embodiment is composed of a spiral micrometer, a breadboard 2, a cylindrical metal rod 3, a polydimethylsiloxane plate 5, a surface electrode 7 and two glass slides 6 The screw micrometer is made up of a screw feeding device 1 and a micro-displacement platform 10, and one end of the cylindrical metal rod 3 is processed with a top 11, and the base 12 of the micro-displacement platform 10 and the upper end surface of the breadboard 2 Fixed connection, the lead screw 13 of the screw feed device 1 is in contact with one side end surface of the micro-displacement platform 10, and the polydimethylsiloxane plate 5 is fixed on the breadboard 2 and positioned on the side of the micro-displacement platform 10 Directly ahead, a glass slide 6 is arranged on the left side and the right side of the polydimethylsiloxane plate 5, and two slides 6 are at...

specific Embodiment approach 2

[0012] Specific implementation mode two: combination figure 1 and figure 2 To illustrate this embodiment, the two injection holes 4 of this embodiment are arranged symmetrically with respect to the central axis of the groove 15 , and the two microchannels 14 are arranged symmetrically with respect to the central axis of the groove 15 . It has good microfluidic flow effect and is convenient for testing. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0013] Specific implementation mode three: combination figure 1 To describe this embodiment, the adjustment distance between the tip 11 of the cylindrical metal rod 3 and the surface electrode 7 of this embodiment is 0-5000 μm. Adjust different distances according to experimental conditions. Others are the same as in the first embodiment.

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Abstract

A point-plane electrode system and a method for micro-fluid drive by using the system relate to an electrode system and a method for micro-airflow drive by using the system. Alternating current micro-airflow driving exists only depending on theory of electric double layer, alternating current electrodynamics can not explain the problem of micro-fluid flowing in full frequency range. The system isas follows: a metal bar is provided with a core clamper, a helix feed device is contacted with a micrometric displacement platform, the left and the right sides of a dimethyl silicone polymer board are provided with glass slides, the dimethyl silicone polymer board is fixedly connected with a plane electrode, the metal bar is fixedly connected with the micrometric displacement platform, and the core clamper is contacted with the plane electrode when a spiral micrometer is adjusted at a zero position. The method comprises the following steps: injecting prepared neutral microspherical solution into a micro-channel, applying an alternating current signal on the core clamper and the plane electrode, and calculating the fluid driving speed, efficiency and flow rate. The system and the method can carry out micro-fluid experiment within relatively big frequency range, provide typical non-uniform electric field and explain the micro-fluid flowing in full frequency range.

Description

technical field [0001] The invention relates to an electrode system and a microfluidic driving method using the system, belonging to the technical field of microfluidic chips. Background technique [0002] Lab-On-a-Chip (LOC) is a new type of experimental research mode based on the rapid development of MEMS technology, and has broad development prospects. Microfluidic manipulation technology is one of the key technologies of the lab-on-a-chip system. It is based on analytical chemistry and analytical biochemistry, and relies on micro-electromechanical processing technology, and is characterized by micro-pipeline network. It is the development of the current micro-total analysis system. a key topic. Compared with traditional biochemical detection methods, the detection system based on microfluidic chips has the advantages of high efficiency, rapidity, low reagent consumption and automation. [0003] Research based on AC electroosmosis is a core topic of microfluidic drive t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B81B7/02B81C5/00
Inventor 姜洪源任玉坤敖宏瑞闫辉于东安东尼奥·罗马斯霍彦婷
Owner HARBIN INST OF TECH
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