Microarray Incubation Chamber Hydrophilic Surface Filling
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Solution Overview
Problem
Microarray systems face challenges in ensuring complete filling of the incubation chamber due to surface tension of liquid samples, leading to potential air pockets and false negatives, and existing solutions with holes in the cover slip risk contamination and air bubble introduction.
Innovation Solution
A microarray system with a hydrophilic surface in the incubation chamber and a one-way dome valve for sample introduction, along with a waste chamber for liquid removal, ensures complete filling and prevents contamination, using hydrophilic materials and a dome valve to facilitate sample entry without air bubbles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the incubation chamber is filled to the rim of the gasket, then the chamber is completely filled with liquid sample, but the liquid sample may leak out of the side of the gasket and compromise the gasket/cover seal
Solution Approach 1:
The patent applies local quality by creating a hydrophilic region at the bottom surface of the cover slip where it contacts the liquid sample. This localized hydrophilic treatment allows the liquid to be attracted to and retained at the bottom surface, preventing leakage from the sides while maintaining complete chamber filling. The hydrophilic property is applied only where needed (at the liquid-gasket interface) rather than throughout the entire chamber.
2Ease of operation
If holes are provided in the cover slip for filling and venting, then the incubation chamber can be filled without leakage, but air bubbles or air pockets may be introduced into the chamber
Solution Approach 1:
The patent changes the surface energy parameter of the cover slip bottom surface by making it hydrophilic. This parameter change allows the liquid sample to be drawn into the chamber through capillary action and surface tension forces, eliminating the need for holes in the cover slip. The hydrophilic surface creates favorable wetting conditions that prevent air bubble formation while enabling complete chamber filling through the gasket interface.
3Quantity of substance
If surface tension of liquid sample is considered, then the liquid sample may not completely fill the incubation chamber, but providing holes for filling increases contamination risk
Solution Approach 1:
The patent converts the harmful effect of surface tension (which prevents complete filling) into a beneficial effect by using capillary action. The hydrophilic surface treatment creates capillary forces that actively draw the liquid sample into the chamber and ensure complete filling. The same surface tension that previously caused filling problems now becomes the driving force for complete, contamination-free filling through the gasket interface without requiring holes in the cover slip.
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 hydrophilic surface overcomes surface tension issues, allowing complete chamber filling and preventing air pockets, while the one-way valve and waste chamber system ensures contamination prevention and efficient liquid management, enhancing the reliability of microarray analysis.
Implementation Method 1
surface tension of a liquid sample or a reaction mixture may also prevent the liquid sample or reaction mixture from completely filling the incubation chamber
Implementation Method 2
At least one of the plurality of interior surfaces is a hydrophilic surface
Data Source
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AI summary
A microarray system, comprising a microarray formed on a planar substrate; an incubation chamber formed around or surrounding said microarray, said incubation chamber comprises a plurality of interior surfaces including a bottom surface on which said microarray is formed and a top surface that faces said microarray, and wherein at least one of said a plurality of interior surfaces is a hydrophilic surface; a one-way valve for loading a liquid sample into said incubation chamber; a first channel connecting said one-way valve to said incubation chamber; a waste chamber containing an absorbent; and a second channel connecting said waste chamber to said incubation chamber.