LUMINESCENT COMPOSITE DIAMONDS WITH CORE-SHELL AND FILM ARCHITECTURE BASED ON DIAMOND WITH NANOPARTICLES FOR PHOTONICS
S.V. Kuznetsov, V.S. Sedov, A.K. Martyanov, I.A. Tiazhelov, R.V. Romashchenko,
S.Ch. Batygov, A.A. Alexandrov, D.S. Yasyrkina, A.S. Zaharova, V.V. Voronov
Prokhorov General Physics Institute of the Russian Academy of Sciences
Abstract
The new photo- and X-ray luminescence diamond composite with core-shell and film architectures based on poly- and single-crystal diamond with embedded nanoparticles of oxides and fluorides are developed [1-4].
The diamond composite materials are synthesized by embedding oxide and fluoride nanoparticles into diamond using chemical vapour deposition technique in hydrogen-methane gas mixtures microwave plasma reactor ARDIS-100. Process scheme for producing composite diamond materials by incorporating particles into diamond is presented in [2]. The powder luminophores based on EuF3, SrF2:REE, β-NaGdF4:REE, Y3Al5O12:REE, KGd2F7:REE (REE – rare-earth elements) are synthesized by co-precipitation from aqueous technique with following high temperature annealing. The compositions with highest intensity values of photo- and X-ray luminescence bands have been determined.
The plasma-chemical reactions occur during particle embedding into diamond and cause changes in the luminescence spectra of the diamond composites compared to those of the initial powders were revealed by X-ray powder diffraction, X-ray Absorption Near Edge Structure (XANES), and spectral-luminescent analysis [1-3]. The formation of hydrides has been reliably confirmed using fluoride powders as overgrowing particles. A key factor is the interaction of the particles with hydrogen plasma in initials stage of diamond growth process, leading to the formation of hydrides on the particle surface and changes in the local environment of luminescent rare-earth cations. The proposed technique for producing diamond composites is flexible and customizable for practical applications.
The developed diamond composites demonstrate efficient photo- and X-ray luminescence, which is promising for use as radiation-resistant visualizers, including high-brightness synchrotron radiation sources [4].
Acknowledgment: This study was funded by the Russian Science Foundation Grant 22-13-00401-P,
https://rscf.ru/en/project/22-13-00401/
References:
1. S.V. Kuznetsov et al Diam. Rel. Mater., 160, (2025) 113062
2. V. Sedov et al Functional Diamond. 2:1, 53 (2022)
3. I.A. Tiazhelov et al Dalton Trans. 53, 15059 (2024)
4. D. V. Karpov et al Sensors@Systems #1 (2026) p.44
Speaker
Sergey Kuznetsov
Prokhorov General Physics Institute of the Russian Academy of Sciences
Russia
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