Microfluidic Channel Surface Layout for Low-Residue Sample Introduction
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Solution Overview
Problem
Existing micro channel devices face issues with liquid remaining at the channel entrance and the entire channel surface receiving water-repellent treatment, which can interfere with analysis and increase costs.
Innovation Solution
A fluid handling device with a water-repellent introduction part and a non-water-repellent ejection part and channel, featuring a valve to control the water-repellent treatment, ensuring only the introduction part receives the treatment, minimizing liquid retention and organic solvent exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a water-repellent treatment is provided to the inner surface of the channel entrance to prevent liquid remaining, then liquid retention is reduced, but the water-repellent treatment is also provided to the entire inner surface of the micro channel, increasing organic solvent content and analysis cost
Solution Approach 1:
The patent applies water-repellent treatment selectively only to the inner surface of the channel entrance (introduction part) while leaving the rest of the channel inner surface untreated. This localized treatment prevents liquid retention at the critical introduction point without contaminating the entire channel with water-repellent agents, thus maintaining analysis accuracy and reducing costs.
2Reliability
If a water-repellent treatment is provided to the inner surface of the channel entrance to prevent liquid remaining, then liquid retention is reduced, but the cost of the water-repellent treatment increases
Solution Approach 1:
The patent applies water-repellent treatment selectively only to the inner surface of the channel entrance (introduction part) while leaving the rest of the channel inner surface untreated. This localized treatment prevents liquid retention at the critical introduction point without contaminating the entire channel with water-repellent agents, thus maintaining analysis accuracy and reducing costs.
3Reliability
If the entire inner surface of the micro channel receives water-repellent treatment, then liquid retention is prevented throughout, but the organic solvent included in the water-repellent agent remaining in the micro channel increases, preventing appropriate analysis
Solution Approach 1:
The patent applies water-repellent treatment selectively only to the inner surface of the channel entrance (introduction part) while leaving the rest of the channel inner surface untreated. This localized treatment prevents liquid retention at the critical introduction point without contaminating the entire channel with water-repellent agents, thus maintaining analysis accuracy and reducing costs.
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 design allows for accurate and efficient analysis of trace substances by preventing liquid retention and reducing the need for costly water-repellent treatments across the entire channel, maintaining analysis quality.
Implementation Method 1
An inner surface of the introduction part has water-repellency, and an inner surface of the ejection part and at least a part of an inner surface of the channel do not have water-repellency
Data Source
AI summary
A fluid handling device includes: an introduction part configured to introduce liquid; an ejection part configured to eject liquid; a channel including one end connected to the introduction part and another end connected to the ejection part; and a valve disposed at the channel. An inner surface of the introduction part has water-repellency, and an inner surface of the ejection part and at least a part of an inner surface of the channel do not have water-repellency.