Molecular-scale soft imprint lithography for alignment layers in liquid crystal devices

Rongsheng Lin, John A. Rogers*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

60 Scopus citations

Abstract

We describe molecular-scale soft nanoimprint lithographic replication of rubbed polyimide substrates to form alignment layers for liquid crystal devices. Systematic studies of the surface relief morphology of the polyimide and molded structures in three different polymers illustrate good lithographic fidelity down to relief heights of several nanometers, and with some capabilities at the level of -1 nm. Collective results of experiments with several polymer formulations for molds and molded materials and process conditions indicate that this molecularscale fidelity in replication can be used to produce surfaces that will effectively align liquid crystal molecules. Good electro-optical responses from liquid crystal light modulators that are formed in this manner suggest utility for fundamental studies and potential practical application.

Original languageEnglish (US)
Pages (from-to)1613-1621
Number of pages9
JournalNano letters
Volume7
Issue number6
DOIs
StatePublished - Jun 1 2007

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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