Density-Guided Flow Cell Immobilization Across Opposed Sequencing Surfaces
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Solution Overview
Problem
Existing methods for immobilizing target materials on opposed sequencing surfaces in flow cells result in uneven distribution and migration issues, leading to inefficiencies in sequencing processes.
Innovation Solution
A method involving the use of fluids with different densities or magnetic forces to immobilize target materials on both sequencing surfaces, ensuring balanced distribution by utilizing target materials with varying densities or applying magnetic forces to magnetically responsive materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional immobilization methods are used on opposed sequencing surfaces, then target materials can be immobilized on both surfaces, but uneven distribution and migration issues occur
Solution Approach 1:
The patent utilizes density as a physical parameter to differentiate target materials, introducing fluids with specific densities that interact differently with target materials of varying densities. This parameter-based separation enables controlled immobilization on opposed surfaces without migration, directly resolving the distribution uniformity and migration control contradiction
Solution Approach 2:
The patent applies magnetic forces as counteracting forces to balance the gravitational settling of magnetic beads. By using magnetic fields to counterweight the density-based separation, the system achieves uniform distribution of target materials on both opposed surfaces while preventing unwanted migration, addressing both distribution uniformity and migration control
2Manufacturing precision
If target materials with varying densities are used, then differential immobilization on opposed surfaces is achieved, but fluid selection and process complexity increase
Solution Approach 1:
The patent changes the density parameter of introduction fluids to match or differ from target material densities, enabling controlled buoyancy and sedimentation. By carefully selecting fluid densities, the system achieves precise immobilization control on opposed surfaces while managing fluid properties to minimize system complexity
Solution Approach 2:
The patent replaces complex mechanical positioning systems with density-based buoyancy and magnetic field-based positioning. This substitution simplifies the overall system by using fundamental physical properties (density, magnetism) rather than complex mechanical actuators to achieve precise immobilization control
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
Achieves a more uniform distribution of target materials across sequencing surfaces, improving sequencing metrics and reducing template strand migration during amplification.
Implementation Method 1
the first fluid has a density less than a density of the target material and the second fluid has a density greater than the density of the target material
Implementation Method 2
applying a magnetic force to another of the two opposed sequencing surfaces, thereby pulling some other of the target material to the other of the two opposed sequencing surfaces
Data Source
AI summary
In an example, a target material is immobilized on two opposed sequencing surfaces of a flow cell using first and second fluids. The first fluid has a density less than a target material density and the second fluid has a density greater than the target material density; or the second fluid has a density less than the target material density and the first fluid has a density greater than the target material density. The first fluid (including the target material) is introduced into the flow cell, whereby at least some of the target material becomes immobilized by capture sites on one of the sequencing surfaces. The first fluid and non-immobilized target material are removed. The second fluid (including target material) is introduced into the flow cell, whereby at least some of the target material becomes immobilized by capture sites on another of the sequencing surfaces.