Tilted Pillar Plate Microarray Tool for Bubble Escape
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Solution Overview
Problem
Microarray systems using inverted pillar plates often generate air bubbles when immersing in assay solutions, which hinder the full contact of probes with the solution, affecting the reliability and accuracy of biomolecular analysis.
Innovation Solution
The use of tools and tool assemblies that suspend the pillar plates at a non-zero tilt angle during immersion, reducing the surface area of the pillars in contact with the solution and allowing bubbles to percolate away, thereby minimizing bubble formation and trapping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If inverted pillar plates are used for microarray handling, then handling efficiency and assay throughput are improved, but air bubble generation increases which reduces analysis reliability
Solution Approach 1:
The pillar plate is tilted at a non-zero angle (e.g., 5-15 degrees) relative to the vertical direction during immersion, creating an asymmetric configuration. This asymmetric tilting prevents air bubbles from becoming trapped between the microarray surface and the solution, allowing bubbles to escape along the tilted surface while maintaining efficient handling and assay throughput.
Solution Approach 2:
The solution introduces a spatial dimension by tilting the pillar plate at an angle rather than immersing it vertically or horizontally. This angular dimension creates a gradient that facilitates bubble escape paths along the pillar surface, resolving the contradiction between maintaining handling efficiency and preventing bubble trapping.
2Ease of operation
If microarrays are immersed vertically in assay solution, then handling is simplified, but air bubbles are trapped which reduces measurement precision
Solution Approach 1:
By tilting the pillar plate at a non-zero angle during immersion, the system maintains relatively simple automated handling while preventing symmetric vertical bubble trapping. The asymmetric angular orientation allows bubbles to escape along the tilted surface, improving measurement precision without significantly complicating the handling operation.
3Reliability
If pillar plates are tilted at non-zero angle, then air bubble formation is reduced, but device complexity increases
Solution Approach 1:
The system dynamically adjusts the pillar plate orientation to a tilted angle only during the critical immersion phase where bubble trapping occurs. The tilting mechanism can be temporarily activated during solution contact and then returned to vertical for handling, providing the bubble-prevention benefit without permanently increasing device complexity.
Solution Approach 2:
The solution adds an angular dimension to the immersion process, tilting the pillar plate at a non-zero angle relative to the vertical. This dimensional change creates escape paths for air bubbles along the tilted surface, improving reliability while the tilting mechanism remains a simple mechanical adjustment that does not significantly increase overall system complexity.
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
This approach significantly reduces the likelihood of air bubbles forming, ensuring better contact between the microarrays and the assay solution, enhancing the reliability and accuracy of biomolecular analysis in microarray systems.
Implementation Method 1
allowing bubbles to percolate away
Data Source
Figure 1
Figure 2A~2B
Figure 3A
AI summary
Disclosed herein are methods, tools, pillar plates, and tool assemblies for biomolecular analysis using microarrays that reduces the likelihood of air bubbles being trapped by the microarrays. Embodiments of the tools include two clamps that have a tool mount portion and a grasping portion. The tool mount portion is configured to engage a lifting mechanism of a plate handling robot for moving a pillar plate that include microarrays. The grasping portion is configured to freely suspend the pillar plate at an inclination of a non-zero tilt angle relative to a plane normal to the tool mount portion. Embodiments of pillar plates include two protruding edges on opposite sides of the pillar plate and a plurality of pillars with one or more affixed microarrays. Embodiments of the tool assembly include the tool and the pillar plate, wherein the protruding edges are configured to engage with the grasping portions.