2024-03-29T10:15:39Z
https://nagoya.repo.nii.ac.jp/oai
oai:nagoya.repo.nii.ac.jp:00027914
2023-01-16T04:45:41Z
673:674:675
Analysis of evolution of electron-radiation-induced defects in white-luminescent, carbonized, mesoporous silica nanocomposite using transmission electron microscopy/cathodoluminescence
Oguni, Kazuki
90880
Sato, Koji
90881
Ishii, Yosuke
90882
Ishikawa, Yukari
90883
Kawasaki, Shinji
90884
Vasin, Andrii
90885
Muto, Shunsuke
90886
Carbonized mesoporous silica
White-light emission
Cathodoluminescence
Photoluminescence
Scanning transmission electron microscopy
Electron energy-loss spectroscopy
We examined the evolution of electron-radiation-induced defects in a white-luminescent, carbonized, mesoporous silica nanocomposite using cathodoluminescence (CL) and electron energy-loss spectroscopy associated with scanning transmission electron microscopy, in order to elucidate the microscopic origins of light emissions in the visible spectral range. The effects of electron irradiation on CL were analyzed based on the differential equations for kinetics of irradiation defects. The nanometric honeycomb silica framework was found to play essentially no role in the electron-excited light emission processes, in contrast to the case for photon-excited processes. The broad and continuous visible emission band in CL consisted of several luminescence components, that have been assigned to optically active point defects such as oxygen-deficient centers, and surface nonbridging oxygen hole centers (NBOHCs) in silica glass.
ファイル公開:2021-01-15
journal article
Elsevier
2019-01-15
application/pdf
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
439
22
33
0168-583X
https://nagoya.repo.nii.ac.jp/record/27914/files/MPSC_Oguni_final.pdf
eng
https://doi.org/10.1016/j.nimb.2018.11.007
© 2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/