Figure 2 | Scientific Reports

Figure 2

From: Titanium dioxide particles frequently present in face masks intended for general use require regulatory control

Figure 2

STEM-EDX analysis of particles (a) in a polyester fiber, (b) at the edge of a polyester fiber, (c) in a bi-component microfiber and (d) in a non-woven fabric. (first column) The low magnification HAADF-STEM images show the cross sections of the fibers containing the analyzed particles (white arrows) shown in the (second column) higher magnification HAADF-STEM images. (third column) The spectral images of Ti (green) obtained by EDX show that the measured Ti signal coincides with the position of the particles shown in the STEM image, and (fourth column) the EDX spectra of the area’s indicated on the STEM image show the Ti signal.

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