Journal
NANO LETTERS
Volume 18, Issue 11, Pages 7395-7399Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.8b03807
Keywords
Plasmonics; DNA origami; thermal control; aptamer-target interactions; circular dichroism; chirality
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Funding
- Sofja Kovalevskaja grant from the Alexander von Humboldt-Foundation
- Volkswagen foundation
- European Research Council (ERC Dynamic Nano) Grant
- Carl-Zeiss-Stiftung
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The DNA origami technique has empowered a new paradigm in plasmonics for manipulating light and matter at the nanoscale. This interdisciplinary field has witnessed vigorous growth, outlining a viable route to construct advanced plasmonic architectures with tailored optical properties. However, so far plasmonic systems templated by DNA origami have been restricted to respond to only single stimuli. Despite broad interest and scientific importance, thermal and aptamer-target regulations have not yet been widely utilized to reconfigure three-dimensional plasmonic architectures. In this Letter, we demonstrate a chiral plasmonic nanosystem integrated with split aptamers, which can respond to both thermal and aptamer-target regulations. We show that our dual-responsive system can be noninvasively tuned in a wide range of temperatures, readily correlating thermal control with optical signal changes. Meanwhile, our system can detect specific targets including adenosine triphosphate and cocaine molecules, which further enhance the optical response modulations and in turn influence the thermal tunability.
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