Fabricating complex three-dimensional nanostructures with high-resolution conformable phase masks

Seokwoo Jeon, Jang Ung Park, Ray Cirelli, Shu Yang, Carla E. Heitzman, Paul V. Braun, Paul J.A. Kenis, John A. Rogers

Research output: Contribution to journalArticlepeer-review


High-resolution, conformable phase masks provide a means to fabricate, in an experimentally simple manner, classes of 3D nanostructures that are technologically important but difficult to generate in other ways. In this approach, light passing through a phase mask that has features of relief comparable in dimension to the wavelength generates a 3D distribution of intensity that exposes a photopolymer film throughout its thickness. Developing this polymer yields a structure in the geometry of the intensity distribution, with feature sizes as small as 50 nm. Rigorous coupled-wave analysis reveals the fundamental aspects of the optics associated with this method; a broad-range 3D nanostructures patterned with it demonstrates its technical capabilities. A nanoporous filter element built inside a microfluidic channel represents one example of the many types of functional devices that can be constructed.

Original languageEnglish (US)
Pages (from-to)12428-12433
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Issue number34
StatePublished - Aug 24 2004

ASJC Scopus subject areas

  • General


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