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Synthesis of Monodisperse Cylindrical Nanoparticles via Crystallization-driven Self-assembly of Biodegradable Block Copolymers
Published on: June 20, 2019
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Thin Films with Perpendicular Tetragonally Packed Rectangular Rods Obtained from Blends of Linear ABC Block
Aynur Guliyeva1, Marylène Vayer1, Fabienne Warmont1
1Interfaces, Confinement, Matériaux et Nanostructures (ICMN) UMR 7374, CNRS-Université d'Orléans, CS 40059, F-45071 Orléans, France.
ACS Macro Letters
|June 2, 2022
Summary
Researchers created ordered nanostructures using a blend of poly(isoprene-block-styrene-block-(2-vinylpyridine)) terpolymers. These self-assembled films serve as templates for nanopatterning applications.
Area of Science:
- Materials Science
- Polymer Science
- Nanotechnology
Background:
- Block copolymers self-assemble into ordered nanostructures.
- Poly(isoprene-block-styrene-block-(2-vinylpyridine)) (ISP) terpolymers offer tunable morphologies.
- Ordered nanostructures are crucial for advanced materials and devices.
Purpose of the Study:
- To investigate the self-assembly of a binary blend of ISP terpolymers with varying compositions.
- To achieve ordered nanostructures with 4-fold symmetry for nanopatterning.
- To characterize the morphology and orientation of the self-assembled domains.
Main Methods:
- Preparation of thin films via spin coating.
- Solvent vapor annealing for morphological reorganization.
- Characterization using atomic force microscopy (AFM), transmission electron microscopy (TEM), and grazing-incidence small-angle X-ray scattering (GISAXS).
Main Results:
- An ordered lattice with 4-fold symmetry of poly(isoprene) (I) and poly(2-vinylpyridine) (P) rods was achieved.
- The I and P domains were oriented perpendicularly to the substrate.
- A novel electronic contrast enhancement technique was developed for GISAXS analysis.
Conclusions:
- The binary blend of ISP terpolymers successfully forms ordered nanostructures.
- These self-assembled structures are suitable templates for nanopatterning.
- Advanced characterization techniques enable precise structural assignment.
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