Encoded Microparticles with Spatial Codes and Glass Shells
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Solution Overview
Problem
Existing methods for producing encoded microparticles face limitations such as insufficient codespace, high cost, inadequate precision, poor performance, and complicated manufacturing and detection processes, particularly in applications like multiplexed bioassays and combinatorial chemistry.
Innovation Solution
The development of encoded microparticles with a spatial code that can be read using optical magnification, featuring a longest dimension less than 50 μm and an outer surface of glass, along with the use of ferromagnetic nanobeads for superparamagnetic properties, and advanced fabrication methods like spin-on-glass techniques, enabling accurate and reliable detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If traditional encoded microparticle methods are used, then codespace is limited, but manufacturing cost increases and manufacturing precision decreases
Solution Approach 1:
The microparticle is segmented into distinct functional regions: a core region containing the spatial code pattern and a shell region providing biochemical functionality. This segmentation allows independent optimization of code density and manufacturing processes, enabling high codespace without proportionally increasing manufacturing complexity
Solution Approach 2:
The spatial code pattern is nested within the microparticle core, while the shell encapsulates this core. This nested structure allows the code information to be contained within a compact volume, significantly increasing the codespace without requiring larger particle sizes or more complex external structures
2Quantity of substance
If microparticle size is reduced to increase codespace, then codespace increases, but detection precision deteriorates
Solution Approach 1:
The microparticle exhibits local quality differentiation between the core and shell regions. The core region is optimized for information density with high-contrast spatial codes, while the shell region is optimized for detection with specific optical, magnetic, or biochemical properties. This allows the particle to maintain small size for high codespace while ensuring detectability through the specialized shell properties
3Quantity of substance
If complex encoding schemes are used to increase codespace, then codespace increases, but device complexity increases
Solution Approach 1:
The patent replaces complex mechanical or optical detection systems with simpler detection methods. For example, magnetic-encoded particles can be detected using simple magnetic sensors rather than complex optical systems, and fluorescent-coded particles can be detected using standard fluorescence microscopy. This substitution maintains high codespace capability while significantly reducing detection system complexity
4Adaptability or versatility
If traditional microparticle materials are used, then material compatibility is limited, but manufacturing precision decreases
Solution Approach 1:
The microparticle employs a composite structure with a core made of one material (e.g., polymer, glass, or silica) and a shell made of a different material (e.g., silica, polymer, or metal oxide). This composite approach allows each material to be optimized for its specific function: the core for stable code embedding and the shell for biochemical compatibility and detection. The standardized shell materials can be produced with high precision using established manufacturing techniques
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 solution provides fast, precise, and cost-effective detection of encoded microparticles with high codespace, ensuring reliable identification and flexible use in various applications, including bioassays and biochemical analyses.
Implementation Method 1
encoded microparticles having superparamagnetic properties through the use of ferromagnetic nanobeads imbedded into the encoded microparticles
Implementation Method 2
a spatial code that can be read with optical magnification
Data Source
AI summary
An encoded microparticle having a spatial code is provided; and a set of encoded microparticles possessing subsets each provided with a distinguishable spatial code, wherein the codes comply with a pre-determined coding scheme. Presented are also methods of using the encoded microparticles in various biological assays, such as various multiplex assays and visualizing them by creating a digital image of the encoded microparticles and determining whether false positives are present. Further are provided methods of manufacture of the encoded microparticles which employ ferromagnetic nanoparticles applied using spin-on-glass techniques.