Recombinant Microorganism Quantum Dot Biosynthesis
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Solution Overview
Problem
Current methods for producing quantum dots are costly and inefficient, and existing biological treatment methods for heavy metals lack effectiveness in producing stable and permeable nanomaterials for in vivo applications.
Innovation Solution
A method involving the use of a recombinant microorganism transformed with a gene encoding a heavy metal-binding protein, such as phytochelatin synthase or metallothionein, is cultured in a heavy metal ion-containing medium to produce nanoparticles, which are then collected and can be further modified for improved properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If chemical synthesis methods are used to produce quantum dots, then production cost and efficiency are improved, but optical stability and in vivo permeability deteriorate
Solution Approach 1:
The patent uses biological systems (microorganisms expressing metal-binding proteins) as an intermediary between chemical synthesis and biological applications. The microorganisms produce quantum dots with inherent biocompatibility while maintaining production efficiency, serving as a mediator that bridges the gap between chemical production methods and biological application requirements.
Solution Approach 2:
The invention changes the production parameters from purely chemical synthesis to a biological production system using recombinant microorganisms. This parameter change enables simultaneous achievement of high production efficiency and excellent optical stability, as the biological system naturally produces quantum dots with stable optical properties suitable for in vivo applications.
2Ease of manufacture
If conventional quantum dot production methods are used, then manufacturing simplicity is improved, but in vivo permeability and stability deteriorate
Solution Approach 1:
The patent replaces conventional chemical synthesis mechanisms with biological production mechanisms. By using microorganisms that naturally synthesize and secrete quantum dots, the method achieves both manufacturing simplicity and enhanced in vivo permeability, as the biological system inherently produces biocompatible nanomaterials without requiring complex surface modification protocols.
3Reliability
If quantum dots are produced for in vivo applications, then optical stability is improved, but production cost and complexity increase
Solution Approach 1:
The patent employs self-service principles by utilizing the microorganism's own metabolic pathways and protein expression systems to produce quantum dots. The recombinant microorganisms automatically synthesize metal-binding proteins that facilitate quantum dot formation and secretion, eliminating the need for complex external synthesis equipment and procedures while maintaining high optical stability for in vivo applications.
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 allows for the economical production of quantum dots with enhanced optical stability and in vivo permeability, enabling their use in biosensors and optical imaging applications.
Implementation Method 1
a method for preparing heavy metal nanoparticles using a heavy metal-binding protein
Implementation Method 2
culturing a microorganism, which is transformed with a gene encoding a heavy metal-binding protein, in a heavy metal ion-containing medium, to produce heavy metal structures in the microorganism
Data Source
AI summary
The present invention relates to a method of preparing heavy metal nanoparticles using a heavy metal-binding protein. More specifically, relates to a method for preparing heavy metal structures, comprising the steps of: culturing a microorganism transformed with a gene encoding a heavy metal-binding protein, in a heavy metal ion-containing medium, to produce heavy metal structures in the microorganism; and collecting the produced heavy metal structures, as well as nanoparticles of heavy metal structures prepared according to said method. Unlike prior methods of preparing quantum dots by physically binding metal materials, the quantum dots disclosed herein can be efficiently produced by expressing the heavy metal-binding protein in cells. In addition, the quantum dots are useful because they can solve an optical stability problem that is the shortcoming of organic fluorophores.