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Characteristics and Nomenclature of Copolymers

Characteristics and Nomenclature of Copolymers

Copolymers are the products obtained from the polymerization of multiple monomer species. So, in a polymer chain itself, there can be multiple repeating units that come from different monomers. The process of synthesizing a polymer from different monomer species is called copolymerization. When two monomers are involved, the polymer is known as a bipolymer. Polymers with three and four monomers are termed terpolymers and quaterpolymers, respectively. Figure 1 depicts the copolymerization of...

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Self-assembly of Complex Two-dimensional Shapes from Single-stranded DNA Tiles

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Published on: May 8, 2015

Design rules for self-assembled block copolymer patterns using tiled templates.

Jae-Byum Chang¹, Hong Kyoon Choi¹, Adam F Hannon¹

¹Department of Materials Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA.

Nature Communications

|February 18, 2014

Summary

This summary is machine-generated.

Researchers developed a new method using topographic template tiles to create complex nanoscale patterns with block copolymers. This advance enables the fabrication of intricate designs previously unattainable with sparse templates.

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Area of Science:

Materials Science
Nanotechnology
Polymer Chemistry

Background:

Directed self-assembly of block copolymers is a key technique for creating nanoscale patterns like lines and bends.
Achieving complex patterns, including dense bends and junctions, using sparse templates has been limited by a lack of systematic design methods.

Purpose of the Study:

To develop a systematic method for designing sparse topographic templates capable of directing complex block copolymer self-assembly.
To enable the fabrication of intricate nanoscale patterns, such as dense bends and junctions, in a single assembly.

Main Methods:

Development of a set of topographic template tiles based on square lattices of posts with restricted geometric features.
Systematic determination of block copolymer patterns resulting from various arrangements of these template tiles.
Utilizing combinatorial approaches to design simple templates that direct complex patterns.

Main Results:

Demonstrated that specific arrangements of template tiles predictably yield complex block copolymer patterns.
Established a method where the template encodes essential pattern information without being a direct replica.
Successfully directed the formation of non-trivial block copolymer patterns using designed sparse templates.

Conclusions:

A novel template design methodology has been established for creating complex nanoscale patterns via block copolymer self-assembly.
This approach overcomes previous limitations, allowing for the directed fabrication of intricate structures with sparse templates.