Centrifugal Microfluidic Device with Temperature Detection Chamber
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Solution Overview
Problem
Current microfluidic devices using centrifugal force face challenges in efficiently analyzing samples due to limitations in sample handling, reagent distribution, and temperature control, which affect the accuracy and reliability of component detection.
Innovation Solution
A microfluidic device with multiple layers bonded using an adhesive, featuring various chambers for sample handling, reagent distribution, and temperature detection, utilizing centrifugal force for sample separation and reaction, and light absorption measurement for component analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If multiple layers are bonded using adhesive in microfluidic device manufacturing, then device complexity is reduced and ease of manufacture is improved, but manufacturing precision may deteriorate due to potential misalignment or incomplete bonding
Solution Approach 1:
The microfluidic device is divided into multiple layers (first substrate, second substrate, adhesive layer) that can be manufactured separately and then bonded together. This segmentation allows each layer to be optimized for its specific function while simplifying the overall manufacturing process compared to creating a single integrated structure.
Solution Approach 2:
An adhesive layer is introduced as an intermediary between the first and second substrates. This adhesive layer facilitates bonding between layers while allowing for alignment features (such as alignment marks or guide structures) that ensure precise positioning, thus resolving the contradiction between ease of bonding and manufacturing precision.
2Productivity
If centrifugal force is used for sample separation in microfluidic device, then sample handling efficiency is improved, but temperature control difficulty increases due to thermal effects generated during rotation
Solution Approach 1:
Temperature sensors are incorporated into the microfluidic device to monitor thermal conditions during centrifugal separation. The system uses feedback control to adjust rotation speed or activate cooling/heating elements to maintain temperature within acceptable ranges, thereby enabling efficient centrifugal sample handling while controlling thermal effects.
Solution Approach 2:
The device allows dynamic adjustment of rotation speed parameters to optimize both separation efficiency and temperature generation. By changing rotational parameters, the system can achieve effective sample separation while minimizing thermal effects, or can activate temperature compensation mechanisms when necessary.
3Measurement precision
If light absorption measurement is used for component detection, then measurement precision is improved, but device complexity increases due to additional optical components and detection systems
Solution Approach 1:
The optical detection system is designed to perform multiple functions using the same basic components. The light source and detector can measure light absorption for component detection, and the same system can be used for other optical measurements such as fluorescence or scattering, thereby reducing overall device complexity while maintaining high measurement precision for component analysis.
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 enables efficient sample analysis by ensuring accurate sample handling, uniform reagent distribution, and appropriate temperature control, enhancing the detection of components and reliability of test results.
Implementation Method 1
bonding multiple layers using an adhesive
Implementation Method 2
separating supernatant from the sample
Implementation Method 3
measuring light absorption of the reactant material
Implementation Method 4
measuring light absorption of the usage detection chamber
Implementation Method 5
measuring light absorption of the excess sample chamber
Implementation Method 6
measuring light absorption of the supernatant detection chamber
Data Source
AI summary
Provided is a microfluidic device including: a sample chamber; at least one analyzing unit receiving a sample from the sample chamber and detecting components contained in the sample according to a reaction of the sample and a reagent; and a denaturation detection chamber determining the storage condition of the microfluidic device, wherein the denaturation detection chamber accommodates a material whose light absorption changes according to the temperature and the water thereof.