Correlative light-electron microscopy using small gold nanoparticles as single probes

Pope, Iestyn ORCID: https://orcid.org/0000-0002-4104-0389, Tanner, Hugh, Masia, Francesco ORCID: https://orcid.org/0000-0003-4958-410X, Payne, Lukas, Arkill, Kenton Paul, Mantell, Judith, Langbein, Wolfgang ORCID: https://orcid.org/0000-0001-9786-1023, Borri, Paola ORCID: https://orcid.org/0000-0002-7873-3314 and Verkade, Paul 2023. Correlative light-electron microscopy using small gold nanoparticles as single probes. Light: Science & Applications 12 , 80. 10.1038/s41377-023-01115-4

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Abstract

Correlative light-electron microscopy (CLEM) requires the availability of robust probes which are visible both in light and electron microscopy. Here we demonstrate a CLEM approach using small gold nanoparticles as a single probe. Individual gold nanoparticles bound to the epidermal growth factor protein were located with nanometric precision background-free in human cancer cells by light microscopy using resonant four-wave mixing (FWM), and were correlatively mapped with high accuracy to the corresponding transmission electron microscopy images. We used nanoparticles of 10 nm and 5 nm radius, and show a correlation accuracy below 60 nm over an area larger than 10 µm size, without the need for additional fiducial markers. Correlation accuracy was improved to below 40 nm by reducing systematic errors, while the localisation precision is below 10 nm. Polarisation-resolved FWM correlates with nanoparticle shapes, promising for multiplexing by shape recognition in future applications. Owing to the photostability of gold nanoparticles and the applicability of FWM microscopy to living cells, FWM-CLEM opens up a powerful alternative to fluorescence-based methods.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy Biosciences
Additional Information:	License information from Publisher: LICENSE 1: URL: http://creativecommons.org/licenses/by/4.0/, Type: open-access
Publisher:	Springer Nature [academic journals on nature.com]
Funders:	EPSRC, BBSRC
Date of First Compliant Deposit:	30 March 2023
Date of Acceptance:	21 February 2023
Last Modified:	12 Oct 2023 03:56
URI:	https://orca.cardiff.ac.uk/id/eprint/158192

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