TY - JOUR
T1 - Nanoparticle discrimination based on wavelength and lifetime-multiplexed cathodoluminescence microscopy
AU - Garming, Mathijs W.H.
AU - Weppelman, I. Gerward C.
AU - De Boer, Pascal
AU - Martínez, Felipe Perona
AU - Schirhagl, Romana
AU - Hoogenboom, Jacob P.
AU - Moerland, Robert J.
PY - 2017/9/14
Y1 - 2017/9/14
N2 - 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.
AB - 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.
UR - http://resolver.tudelft.nl/uuid:686d9383-458b-4fed-969d-73844495cd43
UR - http://www.scopus.com/inward/record.url?scp=85028878751&partnerID=8YFLogxK
U2 - 10.1039/c7nr00927e
DO - 10.1039/c7nr00927e
M3 - Article
SN - 2040-3364
VL - 9
SP - 12727
EP - 12734
JO - Nanoscale
JF - Nanoscale
IS - 34
ER -