Functionalized Graphene Oxide for Rare Cell Detection
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Solution Overview
Problem
Current methods for detecting and isolating rare cells, such as circulating tumor cells, are limited by low yield and low purity due to complex and inefficient analytic approaches, often involving expensive devices that obstruct blood flow and lack sensitivity.
Innovation Solution
A system utilizing a substrate with functionalized graphene oxide extensions, such as gold nanoposts, that interact with bodily fluids to immobilize rare cells, enhancing capture efficiency through specific binding agents and markers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If large three-dimensional structures are used for capturing rare cells, then the device can provide capture functionality, but the device becomes expensive to produce, obstructs blood flow, and lacks sensitivity resulting in low cell capture efficiency
Solution Approach 1:
The patent segments the capture surface into numerous small two-dimensional patterns (e.g., dots, squares, lines) arranged in arrays across the substrate. This segmentation increases the total surface area available for cell capture while maintaining a flat profile that does not obstruct blood flow. The segmented approach allows blood to flow smoothly over the substrate without encountering large three-dimensional obstacles, thereby improving capture efficiency without increasing device complexity.
Solution Approach 2:
The patent transitions from three-dimensional capture structures to two-dimensional patterns on a flat substrate surface. By spreading the capture functionality across the two-dimensional plane rather than using vertical three-dimensional structures, the device increases the effective capture area while maintaining a low profile that allows uninterrupted blood flow. This dimensional change eliminates the obstruction problem associated with tall three-dimensional structures while preserving capture functionality.
2Measurement precision
If complex analytic approaches are used for isolating rare cells, then detection capability is provided, but the yield and purity remain low
Solution Approach 1:
The patent applies local quality by functionalizing specific regions of the two-dimensional patterns with particular antibodies or binding agents tailored to target specific rare cell types. Different areas of the substrate can be functionalized with different markers, allowing simultaneous detection and isolation of multiple cell types with high specificity. This localized functionalization improves detection precision while the overall two-dimensional array structure maintains high productivity by processing large numbers of cells efficiently.
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
The system significantly improves the detection and isolation of rare cells by increasing capture efficiency and purity, allowing for precise and cost-effective analysis of small bodily fluid samples.
Implementation Method 1
a functionalized graphene oxide disposed on the extension
Data Source
AI summary
This disclosure provides a system for detecting rare cells. The system includes a substrate, an extension coupled to the substrate and extending outwardly from the substrate, and a functionalized graphene oxide disposed on the extension. This disclosure also provides a method for detecting rare cells using the system of this disclosure. The method includes the steps of providing the system and introducing a sample of bodily fluid to the system such that the sample interacts with the functionalized graphene oxide.