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Porous Halide Perovskite–Polymer Nanocomposites for Explosive Detection with a High Sensitivity
Author(s) -
Shan Xin,
Zhang Songlin,
Zhou Meng,
Geske Thomas,
Davis Melissa,
Hao Ayou,
Wang He,
Yu Zhibin
Publication year - 2019
Publication title -
advanced materials interfaces
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.671
H-Index - 65
ISSN - 2196-7350
DOI - 10.1002/admi.201801686
Subject(s) - materials science , perovskite (structure) , explosive material , halide , polymer , composite number , nanocomposite , quenching (fluorescence) , chemical engineering , absorption (acoustics) , fluorescence , solvent , inorganic chemistry , photochemistry , composite material , organic chemistry , chemistry , quantum mechanics , physics , engineering
Abstract A porous halide perovskite–polymer nanocomposite is developed using a freeze‐drying process. Such a composite shows strong fluorescence quenching after exposure to explosive nitroaromatics, nitroamines, and nitrate esters with a sensitivity of a few nanograms. In addition, this composite is robust against moisture and solvents, showing negligible change in fluorescence intensities after submersion in water, alcohol, and acid, base, and salt solutions. Transient absorption spectroscopy studies further disclose that the explosive chemical introduces more trap states into the perovskite that contributes to fluorescence quenching of the perovskite.