Region-Specific Covalent Surfaces for Microfluidic Biomaterial Handling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing surfaces of apparatuses, devices, and materials that contact biomaterials such as biomolecules and biological micro-objects often have native properties that are not optimized for short and/or long-term contact, leading to undesired phenomena and limited handling, manipulation, or processing capabilities.
Innovation Solution
The development of microfluidic devices with covalently bound surface modifications, including different linking groups and moieties, achieved through the use of modifying reagents to form distinct covalently modified surfaces on inner surfaces of the device, allowing for regioselective modification within flow and isolation regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If native surfaces are used in microfluidic devices, then device simplicity is maintained, but performance in handling and manipulation of biomaterials deteriorates
Solution Approach 1:
The patent applies different surface modifications to different regions of the microfluidic device. Flow region surfaces are modified with first covalently bound surface modifications (e.g., hydrophobic moieties) to facilitate biomaterial flow, while isolation region surfaces are modified with second covalently bound surface modifications (e.g., hydrophilic moieties) to trap and isolate biomaterials. This local differentiation resolves the contradiction by optimizing each region's surface properties for its specific function without requiring complete device redesign.
Solution Approach 2:
The surface modifications are applied to the microfluidic device before introducing biomaterials into the system. The covalently bound surface modifications are pre-installed on the inner surfaces of the base, cover, and microfluidic circuit material, creating an optimized surface environment in advance. This preliminary preparation eliminates the need for complex in-situ modifications during operation, thereby improving handling performance while maintaining relatively simple device architecture.
2Reliability
If uniform surface modifications are applied throughout the device, then manufacturing simplicity is maintained, but functional performance deteriorates due to lack of region-specific optimization
Solution Approach 1:
The patent implements region-specific surface modifications where the flow region contains first covalently bound surface modifications with first moieties optimized for facilitating biomaterial flow, while the isolation region contains second covalently bound surface modifications with second moieties optimized for trapping and isolating biomaterials. This local quality differentiation enhances functional performance by ensuring each region's surface properties are tailored to its specific operational requirements.
Solution Approach 2:
The microfluidic device is segmented into distinct functional regions (flow region and isolation region), each with its own specific surface modification protocol. The flow region surfaces are modified with first covalently bound surface modifications, while the isolation region surfaces are modified with second covalently bound surface modifications. This segmentation allows for optimized functional performance in each region while maintaining manageable manufacturing complexity through region-specific processing.
3Adaptability or versatility
If covalent bonding is used for surface modifications, then surface stability is improved, but surface diversity and functional versatility are limited
Solution Approach 1:
The patent employs different covalent bonding configurations at different locations within the device. The flow region utilizes first covalently bound surface modifications with first moieties (e.g., hydrophobic groups) that stabilize the surface while facilitating biomaterial flow, whereas the isolation region utilizes second covalently bound surface modifications with second moieties (e.g., hydrophilic groups) that stabilize the surface while enabling biomaterial trapping. This local differentiation achieves both stability and versatility.
Solution Approach 2:
The patent creates composite surface structures by combining different covalently bound surface modifications on the same device. The inner surfaces comprise a composite of first covalently bound surface modifications and second covalently bound surface modifications, each with different chemical properties. This composite approach maintains the stability of covalent bonding while achieving functional versatility through the combination of different surface modification types in different regions.
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
Enhances the performance of microfluidic devices by improving surface properties for better handling and manipulation of biomaterials, reducing undesired interactions and broadening processing capabilities.
Implementation Method 1
reacting the first modifying reagent with a first nucleophilic moiety of the at least one inner surface; forming the at least one covalently modified surface including a first covalently bound surface modification
Implementation Method 2
reacting the second modifying reagent with a second nucleophilic moiety of the at least one inner surface; forming the at least one covalently modified surface including a second covalently bound surface modification
Data Source
AI summary
In biosciences and related fields, it can be useful to modify surfaces of apparatuses, devices, and materials that contact biomaterials such as biomolecules and biological micro-objects. Described herein are surface modifying and surface functionalizing reagents, preparation thereof, and methods for modifying surfaces to provide improved or altered performance with biomaterials.