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Related Concept Videos

Characteristics and Nomenclature of Copolymers01:24

Characteristics and Nomenclature of Copolymers

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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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Assembly of Cytoskeletal Filaments01:18

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Cytoskeletal filaments are polymeric forms of smaller protein subunits. However, individual cytoskeletal filaments may easily disassemble or associate with other similar filaments to form rigid structures. Microfilaments, made of actin monomers, rely on actin-binding proteins to form bundles and create networks of individual actin filaments. Microtubules rely on microtubule-associated proteins (MAPs) to form sturdy cylindrical structures. However, the proteins involved in forming complex...
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Related Experiment Video

Updated: Aug 23, 2025

Synthesis of Monodisperse Cylindrical Nanoparticles via Crystallization-driven Self-assembly of Biodegradable Block Copolymers
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Atomically Flat, 2D Edge-Directed Self-Assembly of Block Copolymers.

Jang Hwan Kim1,2, Hyeon U Jeong3, Hye-In Yeom4

  • 1National Creative Research Initiative (CRI) Center for Multi-Dimensional Directed Nanoscale Assembly, Department of Materials Science and Engineering, KAIST, Daejeon, 34141, Republic of Korea.

Advanced Materials (Deerfield Beach, Fla.)
|October 27, 2022
PubMed
Summary

This study demonstrates sub-10-nm nanopatterning of 2D materials using block copolymer self-assembly. This technique reliably creates graphene nanoribbons with excellent electronic properties for future devices.

Keywords:
2D materialsblock copolymersdirected self-assemblygraphene nanoribbons

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Solid-phase Submonomer Synthesis of Peptoid Polymers and their Self-Assembly into Highly-Ordered Nanosheets
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Area of Science:

  • Materials Science
  • Nanotechnology
  • Condensed Matter Physics

Background:

  • Precise nanoscale shape engineering is crucial for optimizing 2D materials' properties.
  • Existing nanopatterning methods face challenges in achieving high resolution and uniformity.

Purpose of the Study:

  • To develop a reliable method for nanopatterning 2D materials at the sub-10-nm scale.
  • To investigate the mechanism of block copolymer self-assembly alignment on 2D material edges.
  • To fabricate and characterize graphene nanoribbons with controlled dimensions and electronic properties.

Main Methods:

  • Utilized sub-10-nm block copolymer (BCP) self-assembly.
  • Aligned BCP nanopatterns along the atomic edges of 2D flakes (graphene, MoS2, h-BN).
  • Investigated the wetting layer alternation mechanism governing BCP alignment.

Main Results:

  • Achieved highly aligned nanocylinder templates with low line edge roughness (LER) and line-width roughness (LWR).
  • Fabricated sub-10-nm-wide graphene nanoribbon (GNR) arrays.
  • Demonstrated noticeable switching characteristics in GNRs with an on-to-off ratio up to ~6 × 10^4.

Conclusions:

  • BCP self-assembly provides a robust approach for high-resolution nanopatterning of 2D materials.
  • The elucidated alignment mechanism enables precise control over nanostructure formation.
  • The resulting GNRs exhibit promising electronic performance for nanoelectronic applications.