Coated Electrofluidic Electrodes for Selective Particle Isolation
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Solution Overview
Problem
Existing technologies face challenges in efficiently and selectively isolating particles from complex biological fluids, such as cells and extracellular vesicles, for applications in drug discovery and diagnostics, often resulting in low efficiency and high artifact contamination.
Innovation Solution
The use of an electro fluidic device with coated electrodes that manipulate particle permittivity through dielectric, alternating current, and hydrodynamic methods, enhancing particle isolation and capture efficiency by altering the permittivity of particles using coatings like agarose, polyacrylamide, and metal oxides, and employing electrostrictive hydrodynamic forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional particle isolation methods are used, then particle isolation can be achieved, but isolation efficiency is low and artifact contamination is high
Solution Approach 1:
The patent changes the permittivity parameter of particles by coating them with materials having specific permittivity values. This allows particles to be differentiated and isolated based on their electrical permittivity properties, enabling high-efficiency separation from complex biological fluids while maintaining high selectivity and reducing artifact contamination.
Solution Approach 2:
The patent replaces conventional mechanical isolation methods with an electrofluidic system that uses electric fields and hydrodynamic forces. The electrostrictive hydrodynamic forces generated by alternating current applied to coated electrodes enable gentle yet effective particle manipulation, improving both efficiency and selectivity without the artifacts associated with mechanical methods.
2Productivity
If electrode coating is applied to increase capture area, then particle isolation efficiency improves, but device complexity increases
Solution Approach 1:
The patent modifies the electrical parameters of the electrode system by applying coatings with specific permittivity values. This parameter change enhances the electrostrictive forces generated during operation, increasing particle capture efficiency without requiring complex electrode geometries or multiple electrode layers.
Solution Approach 2:
The patent uses composite electrode structures combining conductive electrode materials with dielectric coating materials. This composite approach leverages the electrical properties of the electrode and the permittivity enhancement of the coating material together, achieving high capture efficiency while keeping the overall device structure relatively simple.
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 device achieves high-efficiency and selective isolation of single or multiple particle types with minimal artifact contamination, improving the efficiency and selectivity of particle isolation from complex fluids.
Implementation Method 1
manipulate particle permittivity through dielectric, alternating current, and hydrodynamic methods
Implementation Method 2
employing electrostrictive hydrodynamic forces
Implementation Method 3
employing electrostrictive hydrodynamic forces
Data Source
AI summary
Provided herein are electrohydrodynamic devices, systems, and methods configured to isolate of one or more particles of varying size and dielectric properties.