Linear Microfluidic Array Layout for Stable Temperature Gradient Screening
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current technologies for studying macromolecule phase transitions are low-throughput, labor-intensive, and lack the ability to simultaneously measure thermodynamic and kinetic properties, and fail to provide stable temperature gradients and control moisture levels, leading to inaccurate protein droplet movement.
Innovation Solution
A temperature gradient device with independently controllable thermoelectric coolers creating a linear gradient, integrated with a climate control system and sample holders, allowing for high-throughput, low-volume measurements using a 96 well plate format and optical access for microscopy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional macroscopic sample holders are used for phase transition studies, then measurement capability is provided, but throughput is low and sample consumption is high
Solution Approach 1:
The invention divides the sample holder into multiple micro-channels, allowing parallel measurement of multiple samples simultaneously. This segmentation enables high-throughput analysis while using minimal sample volume in each channel, directly resolving the contradiction between throughput and sample consumption.
Solution Approach 2:
The invention transitions from macroscopic single-sample measurement to microscopic multi-sample parallel measurement by creating a two-dimensional array of micro-channels. This dimensional change enables simultaneous measurement of multiple samples, achieving both high throughput and low sample consumption.
2Reliability
If existing temperature gradient microfluidic devices are used, then temperature gradient measurement is enabled, but temperature gradient stability is insufficient
Solution Approach 1:
The invention incorporates temperature sensors along the micro-channel to monitor temperature distribution in real-time. This feedback mechanism allows for active control and stabilization of the temperature gradient, ensuring both gradient stability and measurement accuracy simultaneously.
Solution Approach 2:
The invention uses thermoelectric coolers (Peltier elements) that provide precise electronic control of temperature parameters. By changing temperature parameters through electrical control rather than mechanical means, the system achieves both stable temperature gradients and high measurement precision.
3Reliability
If existing temperature gradient microfluidic devices are used, then phase transition measurement is possible, but moisture control is inadequate
Solution Approach 1:
The invention encloses the micro-channel array in a sealed chamber that can be purged with inert gas or controlled atmosphere. This creates an environment free from moisture interference, protecting the samples and measurements from humidity-related errors while maintaining reliable environmental control.
4Measurement precision
If existing temperature gradient microfluidic devices are used, then temperature measurement is enabled, but protein droplet migration affects accuracy
Solution Approach 1:
The invention designs the micro-channel with specific surface properties and geometry that create equipotential conditions for protein droplets. By making the channel surfaces hydrophobic or using electrowetting, the system prevents droplet migration along the temperature gradient, eliminating the harmful rolling effect and improving measurement accuracy.
5Productivity
If multiple samples need to be transferred to TGM device simultaneously, then high throughput is required, but current methods lack efficient transfer mechanisms
Solution Approach 1:
The invention merges the sample loading and temperature gradient measurement functions into a single integrated microfluidic chip. Multiple samples are loaded into separate micro-channels on the same chip, eliminating the need for complex transfer mechanisms while achieving high-throughput simultaneous measurement.
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 simultaneous thermodynamic and kinetic measurements with high precision and accuracy by stabilizing temperature gradients and controlling moisture, facilitating rapid thermal equilibrium and minimizing sample volume.
Implementation Method 1
a first thermoelectric cooler (TEC) having a hot surface and a cold surface, the first TEC positioned on the base with the hot surface facing upwards; a second TEC having a hot surface and a cold surface, the second TEC positioned on the base a distance away from the first TEC with the cold surface facing upwards
Data Source
AI summary
A microfluidic chip includes multiple microfluidic channels each in fluid communication with a corresponding inlet. The inlets have a first spacing along a first linear path, wherein a central region of the microfluidic channels has a second spacing along a second linear path. The first spacing is greater than the second spacing. A microfluidic chip cassette is also disclosed.