High Axial and Lateral Resolutions on Self-Assembled Gold Nanoparticle Metasurfaces for Live-Cell Imaging

Shihomi Masuda, Thasaneeya Kuboki, Satoru Kidoaki, Shi Ting Lee, Sou Ryuzaki, Koichi Okamoto, Yusuke Arima, Kaoru Tamada

Research output: Contribution to journalArticlepeer-review

Abstract

A plasmonic metasurface composed of homogeneously self-assembled gold nanoparticles can provide high-contrast fluorescence images confined to the nanointerface. In this study, we successfully demonstrated real-time, high-spatiotemporal-resolution imaging of adhered Venus-paxillin-3T3 live cells under a widefield microscope, where not only a high axial resolution but also a high lateral resolution down to the theoretical limit were confirmed through nascent cluster formation of paxillin. The improved lateral resolution on the sheet could be interpreted as the characteristic of localized surface plasmon resonance (LSPR)-mediated enhanced fluorescence and the metasurface acting as a nanothickness plane light emitter. We also found minimized photobleaching, owing to the increase in the emission efficiency via plasmon-exciton coupling. This simple nanomaterial-based technique will be a powerful tool to enhance interfacial signals and improve the quality of live-cell images, not only under widefield microscopes but also in combination with various super-resolution microscope systems in the future.

Original languageEnglish
Pages (from-to)11135-11142
Number of pages8
JournalACS Applied Nano Materials
Volume3
Issue number11
DOIs
Publication statusPublished - 2020 Nov 25

Keywords

  • gold nanoparticles
  • high resolution
  • live-cell imaging
  • plasmonic metasurface
  • self-assembly

ASJC Scopus subject areas

  • Materials Science(all)

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