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Velocity Map Imaging Photoelectron Spectroscopy of Silver Iodide Aerosol Particles
Danijela Danilović1, Laurent Nahon2, Gustavo A Garcia2
1Center of Excellence for Photoconversion, Vinča Institute of Nuclear Sciences - National Institute of Republic of Serbia, University of Belgrade, P.O. Box 522, 11001, Belgrade, Serbia.
Summary
This study investigated silver iodide nanoparticles
Area of Science:
- Materials Science
- Nanotechnology
- Physical Chemistry
Background:
- Silver iodide nanoparticles (AgI NP) are nanomaterials with potential applications in various fields.
- Understanding their electronic structure is crucial for optimizing their performance.
Purpose of the Study:
- To determine the valence band electronic structure of isolated silver iodide nanoparticles.
- To measure the ionization energy and band gap of AgI NPs.
Main Methods:
- Vacuum-ultraviolet aerosol photoelectron spectroscopy using the velocity map imaging technique (VUV VMI-PES).
- Density Functional Theory (DFT) calculations to analyze electronic states.
Main Results:
- The ionization energy of AgI NPs was determined to be 6.0±0.1 eV.
- DFT calculations indicated that I 5p orbitals significantly contribute to the valence band electronic states.
- The characteristic energy loss of excited photoelectrons was found to be 2.7 eV, matching the nanomaterial's band gap.
Conclusions:
- The valence band electronic structure of AgI NPs was successfully characterized.
- The experimental and computational results provide insights into the electronic properties of silver iodide nanoparticles.
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