Figure 2 | Scientific Reports

Figure 2

From: Rewritable Painting Realized from Ambient-Sensitive Fluorescence of ZnO Nanoparticles

Figure 2

(a) The fluorescence spectra of the ZnO NP solution with concentrations ranging from 0.05 to 0.3 mol/L; (b) Absorption spectra of the ZnO NPs with different concentrations, and the inset shows the fluorescence image of solid NPs evaporated from the NP solution; (c) The images of the NPs and the written words using NP solution as ink under indoor lighting conditions and (d) UV lighting conditions. (The photographs of hand was taken by Ruo-Qiu Wang).

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