Fig. 1
From: Near-infrared light triggered in situ release of CO for enhanced therapy of glioblastoma
Fabrication and characterization of photon transducer. The structure a and energy transfer process b of UCNPs. TEM images c–g and XRD patterns h of C, C-S1, C-S1-S2, C-S1-S2-S3 and C-S1-S2-S3-S4 structured UCNPs. Scale bar: 100 nm. i HAADF image and corresponding elemental mapping of the obtained UCNPs with C-S1-S2-S3-S4 structure. Scale bar: 100 nm. j Absorption spectra of 3HBQ and Ce6, and emission spectrum of PC-UCNPs under excitation at 808 nm