Chemistrode Microfluidic Device for High-Resolution Chemical Sampling
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Solution Overview
Problem
Current methods for delivering and capturing chemical signals in biological systems lack the spatial and temporal resolution needed to understand complex chemical processes, leading to challenges in manipulating and observing chemical signals with high precision.
Innovation Solution
The development of a plug-based microfluidic device, known as the chemistrode, which enables the delivery and recording of chemical signals with high spatial and temporal resolution by using a carrier fluid and plug fluid that are immiscible, allowing for precise mass transport and analysis of chemical signals in microchannels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional methods are used for delivering and capturing chemical signals, then the process is simpler and requires less specialized equipment, but the spatial and temporal resolution is insufficient to understand complex chemical processes
Solution Approach 1:
The device segments chemical signals into discrete plugs within a continuous carrier fluid flow. Each plug represents a distinct chemical signal or sample that can be individually delivered and captured, enabling high spatial and temporal resolution without requiring complex equipment for each individual measurement
Solution Approach 2:
The patent introduces a carrier fluid as an intermediary medium that transports discrete plugs containing chemical signals. This intermediary system allows for precise control and resolution of chemical signal delivery while maintaining relative simplicity in the overall device architecture
2Manufacturing precision
If a carrier fluid and plug fluid system is used for precise mass transport, then spatial and temporal resolution is improved, but the device complexity and operational requirements increase
Solution Approach 1:
The immiscible carrier fluid and plug fluid system self-organizes into discrete plugs through interfacial tension effects. The system automatically segments and transports chemical signals without requiring complex external control mechanisms, maintaining ease of operation while achieving precise mass transport
Solution Approach 2:
The patent utilizes changes in fluid properties (immiscibility, interfacial tension) to control the formation and transport of discrete plugs. By adjusting these physical parameters, precise mass transport is achieved while the system remains relatively simple to operate
3Loss of time
If discrete plugs are used for chemical signal delivery, then temporal resolution is improved, but the complexity of forming and managing plug arrays increases
Solution Approach 1:
The system generates periodic arrays of discrete plugs through continuous flow of carrier fluid with intermittent introduction of plug fluid. This periodic action creates temporally resolved chemical signal delivery while utilizing simple, repeating patterns rather than complex variable control
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 the direct sampling and analysis of chemical signals with high temporal and spatial resolution, decoupling the stimulating and recording process from equipment and expertise requirements, and allows for the identification of new molecules and monitoring of multiple molecular species simultaneously.
Implementation Method 1
using a carrier fluid and plug fluid that are immiscible, allowing for precise mass transport and analysis of chemical signals in microchannels
Implementation Method 2
as carrier fluid and plug fluid enter into the second channel, the second array of plugs is formed due to the surface tension and immiscibility of the two fluids
Implementation Method 3
into an exchange region of the device in which mass exchange between the environment and the plug fluid of at least one plug in the first array of plugs occurs
Data Source
AI summary
A method for sampling and/or introducing a matter to an environment comprises introducing a first array of plugs through a first microchannel of a device into an exchange region of the device in which mass transport between the environment and the plug fluid of at least one plug in the first array of plugs occurs and a second array of plugs is formed. The exchange region is in fluid communication with the first microchannel. The method further comprises directing the second array of plugs into a second microchannel downstream of and in fluid communication with the exchange region.