Imaging Photon-Induced Near-Field Distributions of a Plasmonic, Self-Assembled 
Vesicle by a Laser-Integrated Electron Microscope

He, Wanting; Chen, Chuanshuang; Liu, Yannan; Tomasino, Alessandro; Masouleh, S. Shayan Mousavi; Valdez, Jesus; Guner, Tugrul; Morandotti, Roberto; Moores, Audrey; Botton, Gianluigi A.; Zhou, Yongfeng; Yurtsever, Aycan; Ma, Dongling

doi:10.1021/acs.nanolett.2c05096

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Imaging Photon-Induced Near-Field Distributions of a Plasmonic, Self-Assembled Vesicle by a Laser-Integrated Electron Microscope

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Liu, Yannan
Department of Synthetic Materials and Functional Devices (SMFD), Max Planck Institute of Microstructure Physics, Max Planck Society;

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https://doi.org/10.1021/acs.nanolett.2c05096
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Citation

He, W., Chen, C., Liu, Y., Tomasino, A., Masouleh, S. S. M., Valdez, J., et al. (2023). Imaging Photon-Induced Near-Field Distributions of a Plasmonic, Self-Assembled Vesicle by a Laser-Integrated Electron Microscope. Nano Letters, 23(12), 5842-5850. doi:10.1021/acs.nanolett.2c05096.

Cite as: https://hdl.handle.net/21.11116/0000-000D-4809-9

Abstract

Plasmonic polymeric nanoassemblies offer valuable opportunities in photoconversion applications. Localized surface plasmon mechanisms behind such nanoassemblies govern their functionalities under light illumination. However, an in-depth investigation at the single nanoparticle (NP) level is still challenging, especially when the buried interface is involved, due to the availability of suitable techniques. Here, we synthesized an anisotropic heterodimer composed of a self-assembled polymer vesicle (THPG) capped with a single gold NP, enabling an 8-fold enhancement in hydrogen generation compared to the nonplasmonic THPG vesicle. We explored the anisotropic heterodimer at the single particle level by employing advanced transmission electron microscopes, including one equipped with a femtosecond pulsed laser, which allows us to visualize the polarization- and frequency-dependent distribution of the enhanced electric near fields at the vicinity of Au cap and Au–polymer interface. These elaborated fundamental findings may guide designing new hybrid nanostructures tailored for plasmon-related applications.