Block Copolymer Self-Assembly via Segmentation and Parameter Control
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Solution Overview
Problem
Current block copolymers lack efficient self-assembly properties and versatile functionalization for applications in nanostructured materials and pattern formation, limiting their use in advanced technologies such as next-generation magnetic recording media and electronic devices.
Innovation Solution
Development of a novel block copolymer with specific monomer structures and polymerization methods, including living radical polymerization, to create blocks with enhanced self-assembly capabilities and tunable properties, allowing for the formation of periodic structures like spheres, cylinders, and lamellae, and enabling the formation of nano-scale patterns through selective etching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional block copolymers are used, then basic polymer structure is achieved, but self-assembly properties are insufficient for advanced nanostructured applications
Solution Approach 1:
The patent divides the polymer structure into distinct blocks with different functionalities - one block provides self-assembly capability while another block provides functionalization sites. This segmentation allows each block to independently contribute its specific property, resolving the contradiction between reliable self-assembly and versatile adaptability
Solution Approach 2:
The invention creates a composite block copolymer structure combining different polymer segments with complementary properties. One segment contains groups for self-assembly (such as surfactant-like structures) while another segment provides functional groups for specific applications, achieving both reliable self-assembly and versatile functionalization
2Adaptability or versatility
If block copolymers form periodic structures through phase separation, then various shapes (spheres, cylinders, lamellae) can be created, but manufacturing precision and control over domain sizes are challenging
Solution Approach 1:
The patent utilizes changes in physical and chemical parameters (temperature, solvent composition, molecular weight ratios) to precisely control the self-assembly process and domain sizes. By systematically varying these parameters, the invention achieves both diverse shapes and precise dimensional control
Solution Approach 2:
The invention employs preliminary structuring of the block copolymer chains before final self-assembly, using controlled polymerization methods to pre-establish block lengths and compositions that will subsequently form the desired periodic structures with precise domain sizes
3Reliability
If living radical polymerization is used to create blocks with enhanced self-assembly capabilities, then self-assembly properties are improved, but device complexity and synthesis difficulty increase
Solution Approach 1:
The patent uses living radical polymerization as an intermediary process that enables precise control over block copolymer architecture. This intermediary step, while complex, creates well-defined structures with controlled molecular weights and compositions that dramatically improve self-assembly capabilities in the final product
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 novel block copolymers exhibit excellent self-assembly properties and phase separation, enabling the creation of nano-scale patterns with high aspect ratios, suitable for advanced applications in magnetic recording media and electronic devices.
Implementation Method 1
Block copolymers are capable of forming periodically aligned structure such as the sphere, the cylinder or the lamella through phase separations
Implementation Method 2
Block copolymers are capable of forming periodically aligned structure such as the sphere, the cylinder or the lamella through phase separations
Data Source
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AI summary
The present application provides the block copolymers and their application. The block copolymer has an excellent self assembling property and phase separation and various required functions can be freely applied thereto as necessary.