Microfluidic Device With Embedded Temperature Control Module
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current microfluidic devices for PCR are not portable and lack rapid thermocycling capabilities, making them unsuitable for point-of-care or field use due to the need for large cooling systems and temperature baths.
Innovation Solution
A microfluidic device with a temperature control module featuring a temperature regulating flow channel between two layers in thermal contact with the reaction chamber, utilizing an embedded heater for rapid heating and fins for enhanced heat transfer, along with optically transparent layers for fluorescence measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If large cooling systems and temperature baths are used for PCR thermocycling, then temperature control capability is improved, but device portability deteriorates
Solution Approach 1:
The temperature control channels are nested within the microfluidic device structure itself, with cooling channels positioned between layers of the device. This integration eliminates the need for external cooling systems, enabling portability while maintaining temperature control capability for PCR thermocycling
Solution Approach 2:
A temperature regulating fluid acts as an intermediary medium, flowing through channels in thermal contact with the reaction chamber to transfer heat. This intermediary system enables rapid heating and cooling without requiring large external temperature baths
2Speed
If traditional temperature control methods are used for rapid thermocycling, then heating speed is improved, but device complexity increases
Solution Approach 1:
The temperature control function is segmented into separate heating and cooling channels integrated within the microfluidic device. The heating channel is positioned beneath the reaction chamber while cooling channels are positioned above, allowing independent optimization of each function and simplifying the overall system
Solution Approach 2:
Traditional mechanical temperature control systems are replaced with a microfluidic-based thermal management system using flowing temperature-regulating fluid. This substitution reduces mechanical complexity while enabling rapid thermocycling through controlled convection heat transfer
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 rapid and efficient thermocycling, making the device portable and suitable for point-of-care use by providing rapid heating and cooling while allowing for optical access for fluorescence measurement.
Implementation Method 1
a temperature control module overlaying the reaction chamber; wherein the temperature control module comprises a temperature regulating flow channel disposed between two layers and in thermal contact with the reaction chamber
Implementation Method 2
at least a portion of each layer comprises an optically transparent material
Data Source
AI summary
A microfluidic device is described. The microfluidic device comprises a reaction chamber and a temperature control module overlaying the reaction chamber. The temperature control module comprises a temperature regulating flow channel disposed between two layers and in thermal contact with the reaction chamber, and wherein at least a portion of each layer comprises an optically transparent material. Also described is a method of manufacturing a microfluidic device and a method of controlling temperature of a reaction in a microfluidic device.