Label-free detection and size estimation of combustion-derived carbonaceous particles in a microfluidic approach.
Journal
Nanoscale advances
ISSN: 2516-0230
Titre abrégé: Nanoscale Adv
Pays: England
ID NLM: 101738708
Informations de publication
Date de publication:
29 Jul 2022
29 Jul 2022
Historique:
received:
27
04
2022
accepted:
17
06
2022
entrez:
22
9
2022
pubmed:
23
9
2022
medline:
23
9
2022
Statut:
epublish
Résumé
Detection and size estimation of combustion-derived carbonaceous particles (CDCPs) are important to understand their toxicity. Size determination of individual nano- and microparticles (NMPs) based on scattered light is a straightforward method. However, detection and sizing of CDCPs in biological samples based on scattering alone are not possible due to the compositional heterogeneity of NMPs present in biological samples. Label-free identification of CDCPs based on unique white light (WL) emission, using femtosecond (fs) pulsed near-infrared (NIR) lasers, has emerged as a reliable method even in complex biological samples. However, size estimation of CDCPs in biological samples using label-free techniques is still lacking. Here we report the development of a dual-channel multiphoton flow cytometry (DCMPFC) setup for label-free identification and size-determination of CDCPs in suspensions. Scattering intensity calibration with reference polystyrene (PS) nanoparticles (NPs) and Mie Theory allow us to determine the sizes of CDCPs in aqueous suspensions. Further, the relationship between particle sizes and WL emission intensity was determined, and the sizes of CDCPs in urine samples could also be estimated. This approach is believed to open new opportunities for the quantification and size determination of CDCPs, originating from exposure to air pollution, in liquid biopsies. This is an important step in determining the CDCP exposure of individual persons.
Identifiants
pubmed: 36132818
doi: 10.1039/d2na00262k
pii: d2na00262k
pmc: PMC9419628
doi:
Types de publication
Journal Article
Langues
eng
Pagination
3272-3281Informations de copyright
This journal is © The Royal Society of Chemistry.
Déclaration de conflit d'intérêts
The authors declare no conflicts of interest.
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