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Reversible Growth of Halide Perovskites via Lead Oxide Hydroxide Nitrates Anchored Zeolitic Imidazolate Frameworks for Information Encryption and Decryption. | LitMetric

AI Article Synopsis

  • Metal halide perovskites show promise as luminescent materials for secure information encryption and decryption, but integrating them into stable carrier materials has been challenging.
  • The study introduces a strategy that combines perovskites with lead oxide hydroxide nitrates anchored in ZIF-8 composites, enhancing stability and enabling them to withstand common solvents.
  • The resulting Pb-ZIF-8 films allow for efficient reversible encryption and decryption using blade-coating and laser etching, demonstrating flexibility, large-scale applications, and high resolution for practical use in security technologies.

Article Abstract

The low formation energies of metal halide perovskites endow them with potential luminescent materials for applications in information encryption and decryption. However, reversible encryption and decryption are greatly hindered by the difficulty in robustly integrating perovskite ingredients into carrier materials. Here, we report an effective strategy to realize information encryption and decryption by reversible synthesis of halide perovskites, on the lead oxide hydroxide nitrates (PbO(OH)(NO)) anchored zeolitic imidazolate framework composites. Benefiting from the superior stability of ZIF-8 in combination with the strong bond between Pb and N evidenced by X-ray absorption spectroscopy and X-ray photoelectron spectroscopy, the as-prepared PbO(OH)(NO)-ZIF-8 nanocomposites (Pb-ZIF-8) can withstand common polar solvent attack. Taking advantage of blade-coating and laser etching, the Pb-ZIF-8 confidential films can be readily encrypted and subsequently decrypted through reaction with halide ammonium salt. Consequently, multiple cycles of encryption and decryption are realized by quenching and recovery of the luminescent MAPbBr-ZIF-8 films with polar solvents vapor and MABr reaction, respectively. These results provide a viable approach to integrate the state-of-the-art materials perovskites and ZIF for applications in information encryption and decryption films with large scale (up to 6 × 6 cm), flexibility, and high resolution (approximate 5 μm line width).

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Source
http://dx.doi.org/10.1021/acsnano.2c10170DOI Listing

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