Reconfigurable 3D plasmonic metamolecules

Anton Kuzyk*, Robert Schreiber, Hui Zhang, Alexander O. Govorov, Tim Liedl, Na Liu

*Corresponding author for this work

Research output: Contribution to journalArticle

357 Citations (Scopus)

Abstract

A reconfigurable plasmonic nanosystem combines an active plasmonic structure with a regulated physical or chemical control input. There have been considerable efforts on integration of plasmonic nanostructures with active platforms using top-down techniques. The active media include phase-transition materials, graphene, liquid crystals and carrier-modulated semiconductors, which can respond to thermal1, electrical2 and optical stimuli3-5. However, these plasmonic nanostructures are often restricted to two-dimensional substrates, showing desired optical response only along specific excitation directions. Alternatively, bottom-up techniques offer a new pathway to impart reconfigurability and functionality to passive systems. In particular, DNA has proven to be one of the most versatile and robust building blocks6 for construction of complex three-dimensional architectures with high fidelity. Here we show the creation of reconfigurable three-dimensional plasmonic metamolecules, which execute DNA-regulated conformational changes at the nanoscale. DNA serves as both a construction material to organize plasmonic nanoparticles in three dimensions, as well as fuel for driving the metamolecules to distinct conformational states. Simultaneously, the three-dimensional plasmonic metamolecules can work as optical reporters, which transduce their conformational changes in situ into circular dichroism changes in the visible wavelength range.

Original languageEnglish
Pages (from-to)862-866
Number of pages5
JournalNature Materials
Volume13
Issue number9
DOIs
Publication statusPublished - 2014
MoE publication typeA1 Journal article-refereed

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