Fig. 4: Key factors to consider in single-particle characterization. | Nature Communications

Fig. 4: Key factors to consider in single-particle characterization.

From: Understanding shell coating effects to overcome quenching in single anisotropic upconversion nanoparticles

Fig. 4

a Selection of emission bands for calculating the temperature of samples based on the Boltzmann distribution formula. The deep pink refers to Band 1 covering 512−535 nm, and the light pink refers to Band 2 covering 535−545 nm. b Temperature results of soft-coated AR3 samples calculated based on the selected emission bands. c Intensity versus laser power curves obtained with both increasing and decreasing power densities for soft-coated AR3 samples. The deep and light pink refers to the heating cycles 1 and 2, respectively; the deep and light blue refers to the cooling cycles 1 and 2, respectively. d Power-dependent single particle intensity of soft-coated AR3 samples without ambient moisture (in vacuum). e Power-dependent enhancement factors of upconversion intensity, comparing vacuum AR3 samples to the corresponding air samples. The error bars in (b, d, e) represent the SD calculated from measurements of 20 individual nanoparticles for each sample. Source data are provided as a Source data file.

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