Half-Coated Nanoparticles via DNA Hybridization
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Solution Overview
Problem
Conventional methods for manufacturing Janus nanoparticles require complex procedures such as chemical synthesis and self-assembly of block copolymers, limiting their practicality and efficiency.
Innovation Solution
A method involving the immobilization of nanoparticles on a substrate using DNA, where a first oligonucleotide is self-assembled on the substrate, hybridized with a complementary second oligonucleotide, and nanoparticles are conjugated to the oligonucleotide, followed by coating and treatment with DNA nuclease to achieve half-coated nanoparticles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If self-assembly based on block copolymer is used to manufacture Janus nanoparticles, then asymmetric structure with different surface materials can be achieved, but the manufacturing procedure becomes very complicated and requires understanding of all thermodynamic characteristics
Solution Approach 1:
The patent uses DNA oligonucleotides as intermediary molecules to mediate the assembly of nanoparticles into asymmetric Janus structures. The first oligonucleotide binds to one hemisphere of the nanoparticle while the second oligonucleotide binds to the other hemisphere, creating the asymmetric structure without requiring complex block copolymer self-assembly procedures. This intermediary approach simplifies the manufacturing process while achieving the desired asymmetric morphology.
Solution Approach 2:
The patent segments the nanoparticle manufacturing process into distinct steps: first binding oligonucleotide to one hemisphere, then binding a different oligonucleotide to the other hemisphere. This segmentation allows independent control of each hemisphere's surface properties without requiring simultaneous complex self-assembly, thereby reducing manufacturing complexity while maintaining asymmetric structure.
2Adaptability or versatility
If masking of different materials is used to manufacture Janus nanoparticles, then surface functionalization can be achieved, but several devices and complicated procedures are needed
Solution Approach 1:
The patent employs DNA oligonucleotides as versatile intermediary agents that can be conjugated to different materials and bound to nanoparticle surfaces. This single intermediary approach (DNA) replaces the need for multiple masking devices and procedures, achieving diverse surface functionalization through a unified, simplified protocol.
Solution Approach 2:
The patent demonstrates that DNA oligonucleotides serve multiple functions: they act as binding agents, surface modifiers, and functionalization vectors. This multi-functionality eliminates the need for separate devices and procedures for each functionalization step, as the same DNA-based approach can achieve various surface properties through different oligonucleotide sequences and conjugations.
3Manufacturing precision
If conventional chemical synthesis methods are used to manufacture Janus nanoparticles, then precise control over surface composition can be achieved, but the manufacturing process becomes time-consuming and less economical
Solution Approach 1:
The patent replaces conventional chemical synthesis mechanisms with biological DNA hybridization mechanisms. Instead of using complex chemical reactions to control surface composition, the patent uses specific base-pairing interactions between oligonucleotides and nanoparticle surfaces. This substitution maintains precise compositional control through sequence-specific binding while dramatically improving manufacturing efficiency through milder, faster, and more scalable biological processes.
Solution Approach 2:
The patent changes the fundamental parameter controlling surface composition from chemical reactivity to nucleic acid hybridization thermodynamics. By controlling temperature, salt concentration, and oligonucleotide sequence rather than chemical reaction conditions, the patent achieves precise surface composition control with simpler, more efficient procedures that are easier to scale up for production.
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 method simplifies the production of Janus nanoparticles by eliminating the need for complex chemical synthesis and enables the creation of half-coated nanoparticles through a more economical and straightforward process.
Implementation Method 1
self-assembling a first oligonucleotide on a substrate
Implementation Method 2
self-assembling a first oligonucleotide on a substrate
Implementation Method 3
hybridizing a second oligonucleotide, complementary to a terminal region of the first oligonucleotide, with the first oligonucleotide
Implementation Method 4
conjugating nanoparticles to the second oligonucleotide
Implementation Method 5
coating an exposed surface of the nanoparticles
Implementation Method 6
treating the product in step (d) with DNA nuclease to obtain half-coated nanoparticles
Data Source
AI summary
The present invention provides a method and a kit for half coating nanoparticles. According to the present invention, nanoparticles can be half coated in a relatively simple and economical process that can replace complicated processes, such as chemical synthesis, of a conventional Janus nanoparticle-preparing method.