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Metallic Nanomeshes Fabricated by Multimechanism Directed Self-Assembly
Runze Liu1, Hejin Huang1, Zehao Sun1
1Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States.
ACS Nano
|October 14, 2021
Summary
Directed self-assembly using a multimechanism approach creates precise nanoscale meshes. This method enables the fabrication of advanced conductive nanomeshes and multicomponent metallic structures for next-generation devices.
Area of Science:
- Materials Science
- Nanotechnology
- Polymer Chemistry
Background:
- Block copolymers (BCPs) are crucial for scaling nanoscale device features.
- Directed self-assembly (DSA) offers a pathway for precise nanostructure fabrication.
Purpose of the Study:
- To introduce and investigate a multimechanism directed self-assembly (MMDSA) method.
- To generate orthogonal nanomeshes from a specific BCP and metallize them with platinum.
- To enable the fabrication of complex 2D/3D metallic nanostructures.
Main Methods:
- Utilized a polystyrene-block-poly-2-vinylpyridine BCP.
- Employed MMDSA, integrating trench wall guidance, edge nucleation, and underlayer guidance.
- Conducted experiments and dissipative particle dynamics (DPD) simulations to study mechanisms.
Main Results:
- Achieved well-aligned conductive nanomeshes through MMDSA.
- Demonstrated the alignment of BCP self-assembly with substrate features.
- Successfully extended MMDSA for multicomponent metallic structures with hybrid morphologies.
Conclusions:
- MMDSA effectively controls BCP self-assembly for nanoscale fabrication.
- The integration of multiple guidance mechanisms enhances mesh alignment and precision.
- This technique advances the development of advanced nanodevices and metallic nanostructures.
