Evaluation of enhanced darkfield microscopy and hyperspectral imaging for rapid screening of TiO₂ and SiO₂ nanoscale particles captured on filter media.

ABSTRACT: Here we report on initial efforts to evaluate enhanced darkfield microscopy (EDFM) and light scattering Vis-NIR hyperspectral imaging (HSI) as a rapid screening tool for the offline analysis of mixed cellulose ester (MCE) filter media used to collect airborne nanoparticulate from work environments. For this study, the materials of interest were nanoscale titanium dioxide (TiO₂ ) and silicon dioxide (SiO₂ ; silica), chosen for their frequent use in consumer products. TiO₂ and SiO₂ nanoscale particles (NPs) were collected on MCE filter media and were imaged and analyzed via EDFM-HSI. When visualized by EDFM, TiO₂ and SiO₂ NPs were readily apparent as bright spherical structures against a dark background. Moreover, TiO₂

SUBMITTER: Neu-Baker NM 

PROVIDER: S-EPMC10542856 | biostudies-literature | 2021 Dec

REPOSITORIES: biostudies-literature