Fig. 4: The photographs of Ln3+-manipulated RTP materials. | Nature Communications

Fig. 4: The photographs of Ln3+-manipulated RTP materials.

From: Finely manipulating room temperature phosphorescence by dynamic lanthanide coordination toward multi-level information security

Fig. 4

a The photographs of 4TPYBOH@PVA–Eu (left) and 4TPYBOH@PVA–Tb (right) RTP films that were prepared by being soaked in different Ln3+ concentrations (0.1–20 mg/mL) taken under and after removing the 254 nm UV irradiation. b The photographs of bimetallic Eu3+ and Tb3+-manipulated RTP materials with the increase of the ratio of Tb3+ taken under and after removing the 254 nm UV irradiation, the total Ln3+ concentration is 1 mg/mL.

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