Porous Halide Perovskite–Polymer Nanocomposites for Explosive Detection with a High Sensitivity
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.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Dec 07, 2018
- Source ID
- 10.1002/admi.201801686
Entities
People
- Ayou Hao
- He Wang
- Melissa Davis
- Meng Zhou
- Songlin Zhang
- Thomas Geske
- Xin Shan
- Zhibin Yu
Organizations
- Air Force Office of Scientific Research
- Florida State University
- University of Miami