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Indirect Interactions between Raman Probes Encapsulated within Cucurbit[7]urils and Gold Nanorods to Enhance Long-term Stability and Signal

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Abstract

Surface-enhanced Raman scattering (SERS) is a powerful technique that enhances Raman signals by adsorbing probe molecules on rough metal surfaces. However, SERS is limited because target molecules must strongly interact with metal to enhance a stable Raman signal. In this study, to improve long-term SERS stability, we use cucurbit[7]urils (CB[7]) as bridge molecules and sample containers to probe Rhodamine 6G (R6G) molecules. We observed interactions between gold nanorods (AuNRs) and CB[7] via aggregate formation, which enhanced the Raman signal and improved long-term R6G probe stability by up to 20 days when encapsulated within CB[7] during SERS analysis.

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Acknowledgments

J. W. H is grateful for the National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIP) (No. 2018R1C1B3001154). We thank Prof. Kimoon Kim at Pohang University of Science and Technology for donating CB[7] and helpful discussions.

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Authors and Affiliations

  1. Advanced Nano Bio Imaging and Spectroscopy Laboratory, Department of Chemistry, University of Ulsan, 93 Daehak-Ro, Nam-Gu, Ulsan, 44610, Korea

    Min Jung Seo, Kangkyun Baek & Ji Won Ha

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  1. Min Jung Seo
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  2. Kangkyun Baek
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  3. Ji Won Ha
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Correspondence to Ji Won Ha.

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Seo, M.J., Baek, K. & Ha, J.W. Indirect Interactions between Raman Probes Encapsulated within Cucurbit[7]urils and Gold Nanorods to Enhance Long-term Stability and Signal. ANAL. SCI. 35, 1009–1013 (2019). https://doi.org/10.2116/analsci.19P144

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  • DOI: https://doi.org/10.2116/analsci.19P144

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