Fig. 3From: Perovskite quantum dots modulating upconversion nanomaterials for cancer early detectionsPreparation and characterization of UCNP@SiO2 nanomaterials. A Fluorescence spectrogram of UCNPs and UCNP@SiO2, the excitation light wavelength is 980 nm. B XRD patterns of UCNPs@SiO2 and UCNP@SiO2 + QDs materials. C TEM image of UCNP. D TEM image of UCNP@SiO2Back to article page