Figure 4.

¹O₂ production under X-ray irradiation using LGO:Cr nanoparticles as nanotransducers. a) Absorption spectrum of NC (black) and XEOL spectrum of LGO:Cr (red). Both spectra peaked at ~720 nm. b) ¹O₂ production, measured by SOSG assay. NC-LGO:Cr@mSiO₂ efficiently produces ¹O₂ under X-ray irradiation, manifested as increased 525-nm fluorescence. As a comparison, there was almost no ¹O₂ produced in the controls. c) In vitro SOSG assay with H1299 cells. Efficient ¹O₂ was produced within cells when X-ray was applied following cell incubation with NC-LGO:Cr@mSiO₂ nanoparticles. Scale bars, 100 μm.