Strongly Phase-Segregating Block Copolymers with Sub-20 nm Features
Abstract
The modular synthesis and lithographic potential of diblock copolymers based on polystyrene-block-poly(2-ethyl-2- oxazoline) (PS-b-PEtOx) are highlighted herein. Controlled radical and living cationic polymerization techniques were utilized to synthesize hydrophobic PS and hydrophilic PEtOx building block of varying molar mass. Subsequently, click chemistry was used to couple the blocks and obtain a family of PS-b-PEtOx polymers. The influence of molar mass, composition, and thin-film thickness on the microphase-segregated morphology and orientation were investigated with atomic force microscopy (AFM) and grazing incidence small-angle X-ray scattering (GISAXS). Dense hexagonal arrays of cylindrical nanodomains normal to the substrate, having a periodicity of less than 20 nm were obtained.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 19, 2013
- Accession Number
- ADA616609
Entities
People
- Craig Hawker
- Helen Tran
- Hyunjung Jung
- Joona Bang
- Justin E. Poelma
- Kato L. Killops
- Kristian Kempe
- Luis M Campos
- Richard Hoogenboom
- Ulrich S. Schubert
Organizations
- University of California, Santa Barbara