Plasmonic toroidal metamolecules assembled by DNA origami

• Verfasst von: Urban, Maximilian J. [VerfasserIn]
• Verfasst von: Dutta, Palash K. [VerfasserIn]
• Verfasst von: Wang, Pengfei [VerfasserIn]
• Verfasst von: Duan, Xiaoyang [VerfasserIn]
• Verfasst von: Shen, Xibo [VerfasserIn]
• Verfasst von: Ding, Baoquan [VerfasserIn]
• Verfasst von: Ke, Yonggang [VerfasserIn]
• Verfasst von: Liu, Na [VerfasserIn]
• Titel: Plasmonic toroidal metamolecules assembled by DNA origami
• Verf.angabe: Maximilian J. Urban, Palash K. Dutta, Pengfei Wang, Xiaoyang Duan, Xibo Shen, Baoquan Ding, Yonggang Ke, Na Liu
• E-Jahr: 2016
• Jahr: April 15, 2016
• Umfang: 4 S.
• Illustrationen: Illustrationen
• Fussnoten: Gesehen am 29.05.2020
• Titel Quelle: Enthalten in: American Chemical SocietyJournal of the American Chemical Society
• Ort Quelle: Washington, DC : American Chemical Society, 1879
• Jahr Quelle: 2016
• Band/Heft Quelle: 138(2016), 17, Seite 5495-5498
• ISSN Quelle: 1520-5126
• DOI: doi:10.1021/jacs.6b00958
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1699048479

Abstract

We show hierarchical assembly of plasmonic toroidal metamolecules that exhibit tailored optical activity in the visible spectral range. Each metamolecule consists of four identical origami-templated helical building blocks. Such toroidal metamolecules show a stronger chiroptical response than monomers and dimers of the helical building blocks. Enantiomers of the plasmonic structures yield opposite circular dichroism spectra. Experimental results agree well with the theoretical simulations. We also show that given the circular symmetry of the structures s distinct chiroptical response along their axial orientation can be uncovered via simple spin-coating of the metamolecules on substrates. Our work provides a new strategy to create plasmonic chiral platforms with sophisticated nanoscale architectures for potential applications such as chiral sensing using chemically based assembly systems.