Optical study of oriented double-Se₈-ring clusters and luminescent Se₂⁻ anions in LTA at extremely high selenium loading density |
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Author: | Poborchii, Vladimir V.1; Petranovskii, Vitalii P.2; Glukhov, Igor A.3,4; |
Organizations: |
1National Institute of Advanced Industrial Science and Technology, Tsukuba, 305-8565, Japan 2Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, Ensenada, Baja California, Mexico 3Lab-STICC (UMR CNRS 6285), École Nationale d'Ingénieurs de Brest, France
4Ulyanovsk State University, 42 Leo Tolstoy Street, Ulyanovsk, 432970, Russia
5Optoelectronics and Measurement Techniques unit, University of Oulu, Oulu, Finland |
Format: | article |
Version: | published version |
Access: | open |
Online Access: | PDF Full Text (PDF, 5.3 MB) |
Persistent link: | http://urn.fi/urn:nbn:fi-fe2023020826356 |
Language: | English |
Published: |
Elsevier,
2022
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Publish Date: | 2023-02-08 |
Description: |
AbstractRecently, LTA-Se(1–8) samples with 1–8 Se atoms per cavity (simplified unit cell, large cavity + sodalite cage) obtained via adsorption at the temperature of ∼450 °C were reported. It was shown that single Se8 or single Se₁₂ ring are formed in the large LTA cavities, Se₈/Se₁₂ ring concentration ratio decreasing with an increase in the Se loading density. Contrary, in the present work, using Se vapour adsorption at ∼550 °C, we succeeded in encapsulation of ∼17 Se atoms per cavity (LTA-Se(17)) with a significant increase in the Se₈/Se₁₂ concentration ratio manifesting double Se₈-ring cluster formation in the most of the LTA large cavities, which is a step towards cluster crystal fabrication. According to our polarization/orientation Raman spectroscopic study of LTA-Se(17) single crystals, the orientations of the Se₈ and Se₁₂ appeared to be similar to those in previously investigated LTA-Se(1–8). Importantly, luminescent Se₂⁻ anions, oriented along the LTA 4-fold axes and located in the sodalite cages, are detected via Raman polarization/orientation dependencies of LTA-Se(17). Bright Se₂⁻ light emission with a maximum at ∼1.56 eV and vibronic structure is observed in the 1.3–1.8 eV spectral range. We show that the anions experience a compression in LTA which is slightly relaxing with a decrease in temperature producing an anomalous Raman band downshift. The compression of Se₂⁻ in LTA is weaker/stronger than that in sodalite/cancrinite, luminescence band photon energy depending on its strength. High concentration of regularly arranged Se₂⁻ in LTA suggests considering LTA-Se(17) as an important novel light-emitting material. see all
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Series: |
Microporous and mesoporous materials |
ISSN: | 1387-1811 |
ISSN-E: | 1873-3093 |
ISSN-L: | 1387-1811 |
Volume: | 348 |
Pages: | 1 - 7 |
Article number: | 112395 |
DOI: | 10.1016/j.micromeso.2022.112395 |
OADOI: | https://oadoi.org/10.1016/j.micromeso.2022.112395 |
Type of Publication: |
A1 Journal article – refereed |
Field of Science: |
216 Materials engineering 114 Physical sciences 221 Nanotechnology 213 Electronic, automation and communications engineering, electronics |
Subjects: | |
Funding: |
I.A.G. kindly acknowledges for the support from Ministry of Science and Higher Education of the Russian Federation (075-15-2021-581). A.A.F. is supported by the European Union's Horizon 2020 research and innovation programme (H2020-MSCA–IF–2020, #101028712). |
EU Grant Number: |
(101028712) HiFi Brilliancy - HIgh-speed FIbre-based BRILLouIn ANalyzer for endosCopY |
Copyright information: |
© 2023 The Authors. Published by Elsevier Inc. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). |
https://creativecommons.org/licenses/by/4.0/ |