Efficient surface neutralization and enhanced substrate adhesion through ketene mediated crosslinking and functionalization

Hyunjung Jung, Frank A. Leibfarth, Sanghoon Woo, Sumi Lee, Minhyuk Kang, Bongjin Moon, Craig J. Hawker, Joona Bang

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)


Balancing the interfacial interactions between a polymer and substrate is one of the most commonly employed methods to ensure the vertical orientation of nanodomains in block copolymer lithography. Although a number of technologies have been developed to meet this challenge, there remains a need for a universal solution for surface neutralization that combines simple synthesis, fast processing times, generality toward substrate, low density of film defects, and good surface adhesion. The chemistry of ketenes, which combines highly efficient polymer crosslinking through dimerization and surface adhesion through reaction with the substrate, is shown to be well suited to the challenge. The versatile chemistry of ketenes are accessed through the post-polymerization of Meldrum's acid, which can be easily incorporated into copolymers through controlled radical polymerization processes. Further, the Meldrum's acid monomer is synthesized on a large scale in one step without the need for chromatography. Processing times of seconds, low defect density, simple synthetic procedures, and good substrate adhesion make these materials attractive as robust block copolymer neutralization layers.

Original languageEnglish
Pages (from-to)1597-1602
Number of pages6
JournalAdvanced Functional Materials
Issue number12
Publication statusPublished - 2013 Mar 25


  • block copolymer lithography
  • ketene mediated crosslinking
  • surface neutralization

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • General Chemistry
  • Condensed Matter Physics
  • General Materials Science
  • Electrochemistry
  • Biomaterials


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