Dielectrophoresis Apparatus with Concentration Gradient for Single-Test Separation
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Solution Overview
Problem
Conventional dielectrophoresis (DEP) separation methods require repeated tests to determine optimum conductance, voltage, and frequency conditions for separating target materials, making the process inefficient.
Innovation Solution
An apparatus with a concentration gradient generating unit and a material separating unit, featuring a microchannel network and electrodes, generates a spatially nonhomogeneous electric field to selectively separate target materials using a single test by inducing a fluidic flow and concentration gradient, allowing for the screening of optimum conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional DEP separation methods are used, then target material separation can be achieved, but multiple repeated tests are required to determine optimum conductance, voltage, and frequency conditions
Solution Approach 1:
The apparatus pre-establishes a concentration gradient of electrolyte in the microchannel network before the separation process. This preliminary preparation of the electrolyte gradient enables the system to automatically determine optimum separation conditions without requiring multiple repeated tests, as the gradient is already in place to facilitate single-test optimization.
Solution Approach 2:
The system incorporates detection means that provide feedback during the separation process, allowing real-time monitoring and adjustment of separation conditions. This feedback mechanism enables the apparatus to determine optimum conductance, voltage, and frequency conditions through a single test by observing the separation behavior and making necessary adjustments automatically.
2Reliability
If multiple repeated tests are performed to determine optimum conditions, then accurate separation parameters can be obtained, but the separation process becomes inefficient
Solution Approach 1:
The electrolyte concentration gradient is established in advance within the microchannel network, preparing the system for efficient single-test optimization. This preliminary gradient setup eliminates the need for multiple repeated tests to determine optimum conditions, thereby maintaining high reliability while significantly improving productivity.
Solution Approach 2:
The apparatus utilizes changes in electrolyte concentration parameters to create a gradient that facilitates automatic optimization of separation conditions. By varying the concentration parameter spatially across the microchannel network, the system enables single-test determination of optimum conductance, voltage, and frequency, thus improving both reliability and efficiency.
3Productivity
If a concentration gradient of electrolyte is generated in the microchannel network, then optimum separation conditions can be determined in a single test, but the device structure becomes more complex
Solution Approach 1:
The device is segmented into distinct functional units: injection channels for introducing electrolyte, distribution channels for spreading the electrolyte, flow channels for maintaining laminar flow, and mixing channels for creating the concentration gradient. This segmentation allows each component to perform its specific function efficiently while maintaining an organized, manageable structure that balances complexity with productivity.
Solution Approach 2:
The microchannel network structure serves multiple functions simultaneously: it distributes electrolyte from injection points, maintains controlled flow rates, creates concentration gradients, and facilitates mixing. This multi-functionality reduces the need for separate components, thereby managing device complexity while achieving single-test optimization capability.
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 separation of target materials by generating a conductance gradient that selectively delays the target material's flow, determining the optimal conductance and frequency conditions for separation in a single operation.
Implementation Method 1
generating a conductance gradient that selectively delays the target material's flow
Implementation Method 2
inducing a fluidic flow and concentration gradient
Implementation Method 3
separating a target material from the sample solution by dielectrophoresis
Implementation Method 4
electrodes generate a spatially nonhomogeneous electric field in the chamber when an alternating current is supplied between the electrodes
Data Source
AI summary
A dielectrophoresis (DEP) apparatus including a concentration gradient generating unit, a method of separating a target material in a sample solution using the DEP apparatus, and a method of screening the optimum condition for separating a target material are provided.