Fluidic Constriction Channel for Nanoparticle Size Control
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Solution Overview
Problem
Existing microfluidic systems for producing nanoparticles and precipitating proteins face challenges such as inconsistent results, difficulty in controlling particle size, limited productivity, and the need for specialized personnel, along with risks associated with process changes and damage to proteins during precipitation.
Innovation Solution
The development of fluidic devices with specific configurations, including a reaction well, fluidic constriction channels, and overflow channels, which enable efficient mixing and control of particle size, allowing for consistent production of nanoparticles and protein precipitates without the need for incubation periods, and facilitating easy scale-up from micro to larger volumes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional fluidic systems are used for nanoparticle production, then manufacturing capability is provided, but manufacturing precision and consistency are poor
Solution Approach 1:
The device divides the fluidic system into distinct functional segments: a reaction well for mixing, overflow channels for fluid diversion, and constriction channels for size control. This segmentation allows each component to optimize its function, resulting in consistent nanoparticle production while enabling scalable parallel configurations.
Solution Approach 2:
The constriction channel dimensions are specifically designed to control nanoparticle size through geometric parameters. By adjusting the constriction width and length, the system precisely controls the maximum size of nanoparticles formed during the precipitation process, achieving both consistency and scalability.
2Productivity
If protein precipitation is performed using conventional methods, then protein production is achieved, but protein damage occurs especially at high concentrations
Solution Approach 1:
The system extracts the harmful effect of high-concentration protein aggregation by using the overflow channel to continuously remove excess fluid and prevent overcrowding in the reaction well. This maintains optimal precipitation conditions even at high productivity levels, preventing protein damage.
Solution Approach 2:
The constriction channel acts as an intermediary element that controls the flow and mixing of precipitating agents with protein solutions. This gradual mixing approach prevents sudden high-concentration shocks that could damage proteins, while still achieving efficient precipitation.
3Manufacturing precision
If conventional precipitation methods are used, then protein precipitation is achieved, but incubation periods are required and scaling is difficult
Solution Approach 1:
The overflow channel enables continuous operation by constantly removing precipitated material and replacing it with fresh solution. This continuous flow eliminates the need for static incubation periods, reducing time loss while maintaining consistent precipitation results through steady-state conditions.
4Productivity
If traditional manufacturing systems are used, then production capability is provided, but specialized personnel are required and process changes carry significant risk
Solution Approach 1:
The device is designed to be self-regulating through its passive fluidic elements. The overflow and constriction channels automatically control flow rates and mixing without requiring active control systems or specialized operator intervention. This reduces the expertise barrier while maintaining high productivity through inherent flow dynamics.
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
These devices provide consistent and controlled production of nanoparticles and protein precipitates, reducing the risk of protein damage and enabling straightforward scale-up, while being user-friendly and reducing the dependency on specialized personnel.
Implementation Method 1
the capillary pressure in the fluidic constriction channel is greater than the capillary pressure in the overflow channel
Implementation Method 2
the capillary pressure in the fluidic constriction channel is greater than the capillary pressure in the overflow channel
Data Source
AI summary
The present disclosure provides fluidic devices and fluidic device assemblies, including microfluidic devices and cartridges comprising the same, that in illustrative embodiments, can be used to make particles or protein precipitates, or to monitor precipitate formation. The fluidic devices typically include channels that connect a reaction well to an inlet port and an outlet port, and a fluidic constriction channel that is configured to help retain fluids in the reaction well and/or promote mixing within the reaction well. In some aspect, fluidic devices are interconnected into fluidic assemblies that can be used in continuous process methods.