Hybrid nanocolloids with programmed three-dimensional shape and material composition

Andrew G. Mark, John G. Gibbs, Tung Chun Lee, Peer Fischer

Research output: Contribution to journalArticlepeer-review

364 Scopus citations

Abstract

Tuning the optical, electromagnetic and mechanical properties of a material requires simultaneous control over its composition and shape. This is particularly challenging for complex structures at the nanoscale because surface-energy minimization generally causes small structures to be highly symmetric. Here we combine low-temperature shadow deposition with nanoscale patterning to realize nanocolloids with anisotropic three-dimensional shapes, feature sizes down to 20 nm and a wide choice of materials. We demonstrate the versatility of the fabrication scheme by growing three-dimensional hybrid nanostructures that contain several functional materials with the lowest possible symmetry, and by fabricating hundreds of billions of plasmonic nanohelices, which we use as chiral metafluids with record circular dichroism and tunable chiroptical properties.

Original languageEnglish (US)
Pages (from-to)802-807
Number of pages6
JournalNature Materials
Volume12
Issue number9
DOIs
StatePublished - Sep 2013
Externally publishedYes

ASJC Scopus subject areas

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

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