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https://hdl.handle.net/11147/8834
Title: | Colloidal bimetallic nanorings for strong plasmon exciton coupling | Authors: | Güvenç, Çetin Meriç Mert Balcı, Fadime Sarısözen, Sema Polat, Nahit Balcı, Sinan |
Publisher: | American Chemical Society | Abstract: | Nobel-metal nanostructures strongly localize and manipulate light at nanoscale dimension by supporting surface plasmon polaritons. In fact, the optical properties of the nobel-metal nanostructures strongly depend on their morphology and composition. Until now, various metal nanostructures such as nanocubes, nanoprisms, nanorods, and recently hollow nanostructures have been demonstrated. In addition, the plasmonic field can be further enhanced at nanoparticle dimers and aggregates because of highly localized and intense optical fields, which is known as "plasmonic hot spots". However, colloidally synthesized and circular-shaped nanoring nanostructures with plasmonic hot spots are still lacking. We, herein, show for the first time that colloidal bimetallic nanorings with plasmonic nanocavities and tunable plasmon resonance wavelengths can be synthesized via colloidal synthesis and galvanic replacement reactions. In addition, in the strong coupling regime, plasmons in nanorings and excitons in J-aggregates interact strongly and nanoring-shaped colloidal plexcitonic nanoparticles are demonstrated. The results reveal that the optical properties of the nanoring and the onset of strong coupling can be tamed by the galvanic replacement reaction. Further, the plasmonic nanocavity in the nanorings has immense potential for applications in sensing and spectroscopy because of the space, enclosed by the plasmonic nanocavity, is empty and accessible to a variety of molecules, ions, and quantum dots. | URI: | https://doi.org/10.1021/acs.jpcc.0c01011 https://hdl.handle.net/11147/8834 |
ISSN: | 1932-7447 1932-7455 |
Appears in Collections: | Chemistry / Kimya Materials Science and Engineering / Malzeme Bilimi ve Mühendisliği Photonics / Fotonik Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection |
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acs.jpcc.0c01011.pdf | 5.88 MB | Adobe PDF | View/Open |
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