Microfluidic Mixing Chip Using AC Electric Field for Rapid Reagent Blending
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Solution Overview
Problem
Microfluidic systems face challenges in rapidly and uniformly mixing reagents with low diffusion coefficients, such as DNA hybridization, where the mixing time required can exceed reaction time, hindering efficient analysis.
Innovation Solution
A microfluidic mixing chip with a mixing cavity connected by microchannels, containing a light emitting compound and a redox reagent or catalyst, utilizes a high frequency alternating current electric field to generate chemiluminescence or bioluminescence signals, which are detected using a photon sensitive detector, enhancing mixing efficiency and reproducibility through electro-osmotic flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional passive diffusion mixing is used in microfluidic systems, then the system structure remains simple, but the mixing time becomes excessively long and exceeds the reaction time for reagents with low diffusion coefficients
Solution Approach 1:
The patent applies high frequency alternating current electric field to induce electro-osmotic flow and mixing in the microfluidic channel. The AC electric field causes periodic movement of ions and fluid, creating enhanced mixing effects that dramatically reduce mixing time while maintaining a simple channel structure without mechanical moving parts.
Solution Approach 2:
The patent replaces conventional mechanical mixing methods (such as rotating mixers or pumps) with an electric field-based electro-osmotic mixing mechanism. This substitution eliminates the need for complex mechanical components while achieving rapid and uniform mixing of reagents with low diffusion coefficients.
2Ease of operation
If the microfluidic system is minimized for portability and cost reduction, then ease of operation and manufacturing improve, but the ability to achieve rapid mixing of reagents with low diffusion coefficients deteriorates
Solution Approach 1:
The patent replaces complex mechanical mixing systems with an electric field-based solution that is easily integrated into miniaturized microfluidic devices. The electro-osmotic mixing mechanism requires only electrode placement and AC power supply, significantly simplifying the system while enabling rapid mixing in portable devices.
Solution Approach 2:
The patent utilizes changes in electric field parameters (frequency, amplitude, waveform) to control and optimize mixing performance. By adjusting these electrical parameters, the system can achieve rapid mixing of various reagent types without requiring complex mechanical adjustments or reconfiguration of the device structure.
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
The system enables continuous detection of optical signals in short time, improving the reproducibility and efficiency of mixing, allowing for rapid and uniform sample mixing, thereby addressing the limitations of prior art in microfluidic analysis.
Implementation Method 1
utilizing a power source with high frequency alternating current electric field... the light emitting compound, the redox reagent and the catalyst are mixed in the mixing cavity
Implementation Method 2
generate the chemiluminescence optical signals or the bioluminescence optical signals
Implementation Method 3
generate the chemiluminescence optical signals or the bioluminescence optical signals
Implementation Method 4
the chemiluminescence optical signals or the bioluminescence optical signals are detected by a photon sensitive detector
Data Source
AI summary
A method for detecting optical signals, a microfluidic mixing chip having light emitting compound and a system thereof are provided. The microfluidic mixing system comprises the microfluidic mixing chip, an electrode pairs and a power supplier. The microfluidic mixing chip comprises a first side cavity, a second side cavity and a mixing cavity. The mixing cavity is disposed between the first side cavity and the second side cavity. The mixing cavity further contains the light emitting compound, a catalyst and a redox reagent. The electrode pair is respectively disposed to the first side cavity and the second cavity. The power supplier supplies a power source with high frequency alternating current electric field. By utilizing the power source with alternating current electric field, the light emitting compound, the redox reagent and the catalyst are mixed in the mixing cavity to generate a chemiluminescence or bioluminescence optical signal to detect.