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Wide-field imaging of single nanoparticle extinction with sub-nm2 sensitivity

Payne, Lukas, Langbein, Wolfgang ORCID: and Borri, Paola ORCID: 2018. Wide-field imaging of single nanoparticle extinction with sub-nm2 sensitivity. Physical Review Applied 9 , 034006. 10.1103/PhysRevApplied.9.034006

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We report a highly sensitive wide-�eld imaging technique for quantitative measurement of the optical extinction cross-section �ext of single nanoparticles. The technique is simple and high-speed, and enables simultaneous acquisition of hundreds of nanoparticles for statistical analysis. Using rapid referencing, fast acquisition, and a deconvolution analysis, a shot-noise limited sensitivity down to 0.4nm2 is achieved. Measurements on a set of individual gold nanoparticles of 5nm diameter using this method yield �ext = (10:0 � 3:1)nm2, consistent with theoretical expectations, and well above the background uctuations of 0.9nm2.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Biosciences
Physics and Astronomy
Publisher: American Physical Society
ISSN: 2331-7019
Date of First Compliant Deposit: 8 January 2018
Date of Acceptance: 29 December 2017
Last Modified: 06 Apr 2023 16:27

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