Magnetic Nanoparticle Color Encoding via Structural Photonic Crystals
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Solution Overview
Problem
Current multiplex analysis methods for biomolecule screening and diagnostics face limitations in generating a large number of distinct codes for microparticles, which hinders throughput and efficiency.
Innovation Solution
A color encoding method using magnetic nanoparticles dispersed in a liquid medium, aligned by a magnetic field and solidified with patterned energy sources to create multilevel color codes, enabling structural colors determined by inter-particle distance, and forming photonic crystals for encoding and decoding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If spectral encoding methods using coloring materials such as quantum dots or fluorescent dyes are used to increase the number of distinct codes, then the coding capacity is improved, but the device complexity and manufacturing complexity increase due to the need for multiple coloring materials
Solution Approach 1:
The patent changes the encoding parameter from material composition (multiple coloring materials) to structural parameter (inter-particle distance). By varying the distance between magnetic nanoparticles in chains, different structural colors are generated, enabling billions of distinct codes without requiring multiple types of coloring materials.
Solution Approach 2:
The patent replaces the chemical/material-based encoding system (spectral encoding with quantum dots or fluorescent dyes) with a physical/structural encoding system (structural color from magnetic nanoparticle chains). This substitution eliminates the need for multiple coloring materials while achieving high coding capacity.
2Quantity of substance
If spectral encoding methods using multiple coloring materials are used to increase throughput, then the coding capacity is improved, but the ease of manufacture deteriorates due to the need to embed or attach multiple coloring materials
Solution Approach 1:
The patent simplifies manufacturing by changing from material-based encoding to structure-based encoding. The inter-particle distance parameter can be precisely controlled during the chain formation process, enabling high coding capacity without the complex steps of embedding or attaching multiple coloring materials.
Solution Approach 2:
The patent uses a single type of magnetic nanoparticle that can be repeatedly used to generate different codes by controlling the chain structure. This eliminates the need to manufacture and handle multiple different coloring materials, significantly simplifying the manufacturing process.
3Quantity of substance
If graphical encoding methods based on patterning of optically detectable elements are used to increase distinct codes, then the coding capacity is improved, but the device complexity and manufacturing precision requirements increase
Solution Approach 1:
The patent achieves high coding capacity by controlling the inter-particle distance parameter in magnetic nanoparticle chains rather than creating complex graphical patterns. This approach requires less manufacturing precision compared to graphical encoding methods that need to pattern multiple optically detectable elements.
Solution Approach 2:
The patent replaces the graphical/patterning-based encoding system with a magnetic field-controlled structural encoding system. The magnetic field naturally organizes particles into chains with controlled spacing, eliminating the need for precise graphical patterning processes.
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
This approach significantly increases coding capacity, allowing for billions of unique codes, enhancing multiplex analysis throughput and efficiency in biomolecule screening and diagnostics, while eliminating the need for multiple coloring materials.
Implementation Method 1
applying a magnetic field to the composition to align the magnetic nanoparticles
Implementation Method 2
applying patterned UV rays to the composition to form a free-floating particle with fixed 1D chain structures
Implementation Method 3
The color encoded magnetic structure includes: a solid medium; and a code region present in the solid medium and including magnetic nanoparticles aligned in a chain structure. The color encoded magnetic structure is encoded in multilevel by generating structural colors determined by inter-particle distance between the aligned magnetic nanoparticles.
Data Source
AI summary
Provided is a color encoding method including providing a composition including a liquid medium and magnetic nanoparticles dispersed in the liquid medium; applying a magnetic field to the composition to align the magnetic nanoparticles; and applying a patterned energy source to the composition to solidify the composition, wherein more than one region of the composition are sequentially solidified with varying magnetic field strength to fix a plurality of color codes.