Fig. 6: Time-resolved anti-counterfeiting application of CDs@SiO2. | Nature Communications

Fig. 6: Time-resolved anti-counterfeiting application of CDs@SiO2.

From: Ultralong lifetime and efficient room temperature phosphorescent carbon dots through multi-confinement structure design

Fig. 6

a Digital photographs of information encryption made from CDs/n-SiO2, CDs@SiO2-500, CDs@SiO2-600, and CDs@SiO2-550. b Digital photographs of phosphorescence from CDs@SiO2-600 in different environmental liquids. c Digital photographs of information encryption made from CDs@SiO2-600 and CDs@SiO2-550. The white area was overlaid with CDs@SiO2-600, and the black part of the corner is covered with CDs@SiO2-550.

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