Publication

Nanoparticle discrimination based on wavelength and lifetime-multiplexed cathodoluminescence microscopy

Garming, M. W. H., Weppelman, I. G. C., de Boer, P., Martínez, F. P., Schirhagl, R., Hoogenboom, J. P. & Moerland, R. J. 14-Sep-2017 In : Nanoscale. 9, 34, p. 12727-12734 8 p.

Research output: Scientific - peer-reviewArticle

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DOI

Nanomaterials can be identified in high-resolution electron microscopy images using spectrally-selective cathodoluminescence. Capabilities for multiplex detection can however be limited, e.g., due to spectral overlap or availability of filters. Also, the available photon flux may be limited due to degradation under electron irradiation. Here, we demonstrate single-pass cathodoluminescence-lifetime based discrimination of different nanoparticles, using a pulsed electron beam. We also show that cathodoluminescence lifetime is a robust parameter even when the nanoparticle cathodoluminescence intensity decays over an order of magnitude. We create lifetime maps, where the lifetime of the cathodoluminescence emission is correlated with the emission intensity and secondary-electron images. The consistency of lifetime-based discrimination is verified by also correlating the emission wavelength and the lifetime of nanoparticles. Our results show how cathodoluminescence lifetime provides an additional channel of information in electron microscopy.

Original languageEnglish
Pages (from-to)12727-12734
Number of pages8
JournalNanoscale
Volume9
Issue number34
Early online date22-Aug-2017
StatePublished - 14-Sep-2017

    Keywords

  • SCANNING-ELECTRON-MICROSCOPE, NITROGEN-VACANCY CENTERS, FLUORESCENT NANODIAMONDS, HIGH-RESOLUTION, BEAM EXCITATION, PHOTOLUMINESCENCE, IDENTIFICATION, MOLECULES, DENSITY, DIAMOND

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