Fig. 4 Characterization and SERS spectra of tetrameric metamolecules.

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Presentation transcript:

Fig. 4 Characterization and SERS spectra of tetrameric metamolecules. Characterization and SERS spectra of tetrameric metamolecules. (A) Schematic of the tetrameric metamolecule that is incorporated with Raman dye. (B) Real-color photograph and the corresponding SEM images of the two individual tetramers (i and ii). Scale bars, 1 μm. (C) High-magnification SEM images reveal the difference between two tetramers. Scale bars, 100 nm. (D) FDTD calculations for two tetramer clusters. Scale bars, 50 nm. (E) Nonpolarized experimentally scattering spectra of the two individual tetramers. (F) Raman spectra of individual tetramers with intercalated SYBR Green I molecules (spectra i and ii) and the highly concentrated bulk solution (black curve) of SYBR Green I. All measurements were performed with a 633-nm excitation laser (10-s exposure). Weina Fang et al. Sci Adv 2019;5:eaau4506 Copyright © 2019 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).