Lab-on-a-chip Electronic Actuation for Fluid Mixing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current microfluidic devices face challenges such as expensive non-polymeric material joining processes, insufficient biocompatibility for biological reagents, complex and contaminating valve systems, and non-robust fluid driving mechanisms that require external machinery, limiting their efficiency and portability.
Innovation Solution
A lab-on-a-chip device with biocompatible materials and electronic actuation of moving pistons within a sealed system, allowing precise control of fluid movement and mixing in microfluidic channels, using sensors and an external actuator platform to manage fluid flow and prevent contamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional valve systems are incorporated to control fluid flow, then fluid direction control is improved, but device complexity and manufacturing cost increase due to complicated valve structures and potential contamination
Solution Approach 1:
The patent removes traditional valve components from the microfluidic device entirely. Instead of incorporating complex valve structures within the device, the invention uses external electronic control systems to actuate pumps that control fluid flow direction, thereby simplifying the device structure while maintaining operational control
Solution Approach 2:
The invention replaces mechanical valve systems with an electronic control system. Electronic actuators control pumps to direct fluid flow, substituting the need for mechanical valves and reducing device complexity while improving ease of operation through electronic programming and control
2Power
If external pressure sources and machinery are used to drive fluids, then fluid driving capability is improved, but portability and device robustness deteriorate due to heavy external equipment requirements
Solution Approach 1:
The patent integrates the fluid driving system directly into the microfluidic device structure. Pumps and actuators are incorporated within the device housing, merging previously separate external machinery with the device itself, thereby maintaining fluid driving capability while significantly improving portability
Solution Approach 2:
The invention creates a self-contained device that performs multiple functions including fluid pumping, mixing, heating, and detection within a single integrated platform. This multi-functional design eliminates the need for separate external equipment, enhancing both portability and robustness while maintaining full fluid driving capability
3Manufacturing precision
If non-polymeric materials are used for device manufacturing, then manufacturing precision is improved, but biocompatibility deteriorates preventing incorporation of biological reagents
Solution Approach 1:
The patent employs biocompatible polymeric materials such as PDMS (polydimethylsiloxane) or cyclic olefin copolymer (COC) for device fabrication. These materials provide sufficient manufacturing precision for microfluidic structures while ensuring biocompatibility for incorporating biological reagents, resolving the contradiction between precision and biocompatibility
4Reliability
If polymeric materials are used for device manufacturing, then biocompatibility is improved, but manufacturing precision deteriorates due to challenges in joining polymeric portions
Solution Approach 1:
The patent incorporates alignment features and pre-designed joining structures during the device fabrication process. Microfeatures such as alignment pins, interlocking geometries, and pre-formed bonding surfaces are created in advance, enabling precise joining of polymeric components without requiring high-precision post-fabrication alignment operations
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables efficient, precise, and portable fluid mixing and handling with reduced reagent costs, improved biocompatibility, and reduced contamination, facilitating simultaneous processes within the same device.
Implementation Method 1
The plunger exerts pressure on a closing plug (2) into the fluid inlet hole (4), allowing the fluid to pass through the communication channel (7)
Data Source
Figure 1A~1B
Figure 2A~2E
Figure 3A~3H
AI summary
Lab-on-a-chip comprising an upper fluid driving area (3) and another lower area (5) with microfluidic mixing channels (19), wherein the driving area is provided with at least two fluid inlet holes (4) and respective moving plungers (12), each attached to a piston (15) and a driver (14), wherein the drivers (14) are connected to an actuator platform (23) provided with a processor and a motor for actuating the drivers (14) and plungers, and the fluid inlet holes (4) are provided with a closing plug (2) inside. Thus, it is possible to perform several fluid mixing processes while controlling the direction of the movement of the fluid within the microchannels in order to carry out mixtures in less time and space.