Microfluidic Lab-on-a-CD Control via Centrifugal Force
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Solution Overview
Problem
Existing microfluidic systems face challenges in controlling fluid flow and temperature within lab-on-a-CD devices due to their rotary nature, making it difficult to perform biochemical procedures efficiently.
Innovation Solution
A microfluidic system utilizing centrifugal force, magnetic force, and indirect heat, with a control apparatus that includes a central control block, rotator control block, position control block, and energy source control block, to manage fluid flow and biochemical reactions in a disk-shaped rotary body with microfluidic structures, using electromagnetic waves and heat generating particles for precise control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a lab-on-a-CD uses a rotary body that is free to move, then the device can be compact and portable, but controlling fluid flow and temperature within the device becomes difficult
Solution Approach 1:
The patent replaces mechanical pumping systems with centrifugal force generated by rotation to control fluid flow. The rotary body itself becomes the pumping mechanism, eliminating the need for separate mechanical pumps and enabling compact design while maintaining flow control capability through rotational speed adjustment.
Solution Approach 2:
The rotary body serves multiple functions simultaneously: it provides structural support for the microfluidic chip, generates centrifugal force for fluid flow, enables temperature control through rotation-dependent heating/cooling, and facilitates sample processing. This multi-functionality reduces the number of separate components needed.
2Adaptability or versatility
If multiple biochemical procedures are performed on a single chip, then the system becomes more integrated and portable, but the complexity of controlling each procedure increases
Solution Approach 1:
The microfluidic chip is divided into multiple independent functional modules (mixing chamber, reaction chamber, separation chamber, detection chamber) that can operate semi-independently. Each module has dedicated control parameters, allowing complex biochemical procedures to be broken down into manageable segments that are controlled through the rotation profile.
Solution Approach 2:
The system uses periodic rotation at different speeds and directions to sequentially perform different biochemical operations. By varying the rotation profile over time, the same physical device can perform mixing, incubation, separation, and detection in a repeating cycle, simplifying the control architecture compared to having separate control mechanisms for each function.
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
Enables efficient control of fluid flow and biochemical reactions, simplifying procedures like nucleic acid extraction and PCR, reducing the number of steps required and improving analysis time, while allowing for miniaturized and portable operation of the microfluidic system.
Implementation Method 1
A microfluidic system utilizing centrifugal force, magnetic force, and indirect heat
Implementation Method 2
heat generating particles which emit heat upon application of energy
Data Source
AI summary
Provided are an apparatus and a method of controlling a microfluidic system, and the microfluidic system. The apparatus of controlling the microfluidic system includes a central control block controlling an operation of the microfluidic system, a rotator control block controlling a rotator, a position control block controlling the position of a moving unit, the moving unit moving to a position of the microfluidic structure, and a radiation energy source control block controlling energy of a radiation energy source, the radiation energy source using an electromagnetic wave to scan over a position of the microfluidic structure. Such a configuration allows effective control of a miniaturized portable microfluidic system.