On the Influence of Ion Incorporation in Thin Films of Block Copolymers


  • This work was supported by the U.S. Department of Energy (DOE), the NSF-supported MRSEC at the University of Massachusetts Amherst, and the Army Research Office. The use of the APS is supported by the DOE. We also thank Prof. Edward Kramer (University of California at Santa Barbara), Prof. Rachel Segalman (University of California at Berkley), Prof. Ryan Hayward (University of Massachusetts Amherst), and Dr. Gila Stein (NIST) for their help in the quantitative characterization of long-range order in 2D systems. Supporting Information is available online from Wiley InterScience or from the author.


The incorporation of a small amount of salt in a block copolymer leads to strong modifications of the interfacial interactions, causing the microdomains to orient perpendicular to the surface during solvent evaporation. This approach can be used to prepare hexagonally ordered cylindrical arrays with high aspect ratios over large areas.

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