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. 2022 Feb 25;8(8):eabl8392. doi: 10.1126/sciadv.abl8392

Fig. 4. Excitation wavelength–dependent RTP emission with stimulus-responsive property and corresponding applications.

Fig. 4.

(A) Schematic illustration of the synthetic process of BNP-BOH-PVA film and changes with different excitation wavelengths under heating or water stimulus. (B) Phosphorescence spectra of the desiccative BNP-BOH-PVA film at different excitation wavelengths. Phosphorescence spectra of the desiccative BNP-BOH-PVA film when the excitation wavelengths are (C) 254, (D) 312, and (E) 365 nm. Inset: The corresponding photographs of the desiccative BNP-BOH-PVA film at different excitation wavelengths when the UV lamp was turned off. The schematic illustration of application process for (F) information encryption with Morse code, (G) multicolor paper and ink, and (H) information encryption with silk screen printing.