Сибирский федеральный университет

Тип публикации: статья из журнала

Год издания: 2015

Идентификатор DOI: 10.1016/j.diamond.2015.06.010

Ключевые слова: Defect characterization, Diamond nanostructures, Impact synthesis, Light emission, Optical emission, Optical properties, Agglomeration, Carbon, Defects, Diamond films, Luminescence, Nitrogen, Broadband emission, Exponential components, High-temperature annealing, Luminescence decays, Nitrogen diffusion, Optical emissions, Thermoluminescence peaks, Diamonds

Аннотация: Impact diamonds (IDs) from the Popigai crater are aggregates of nanoparticulate graphite and cubic and hexagonal diamonds. IDs demonstrate broad-band emissions at 3.05, 2.8, 2.3 and 2.0 eV, which are associated with structural defects and are similar to those in detonation ultra-dispersed diamonds and CVD diamond films. A doublet with components at 1.7856 and 1.7892 eV in some ID samples is related to R<inf>1,2</inf> lines of Cr3 + ions in corundum inclusions. The presence of N3, H3, NV0 and NV- vibronic systems in some of the ID samples shows that (i) there is nitrogen impurity and (ii) samples underwent high temperature annealing that promoted vacancies and nitrogen diffusion and defect aggregation. The luminescence decay fits with a sum of two exponential components: lifetime of the fast one is in the 5 to 9 ns range. Parameters of the traps responsible for broad thermoluminescence peaks at 148, 180, 276 and 383 K were estimated. © 2015 Elsevier B.V. All rights reserved.

Журнал: Diamond and Related Materials

Выпуск журнала: Vol. 58

Номера страниц: 69-77

• Yelisseyev A. (V.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences, 3 Ac. Koptyug Ave., Novosibirsk, Russian Federation)
• Khrenov A. (V.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences, 3 Ac. Koptyug Ave., Novosibirsk, Russian Federation)
• Afanasiev V. (V.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences, 3 Ac. Koptyug Ave., Novosibirsk, Russian Federation)
• Pustovarov V. (Ural Federal University, 19 Mira Str., Ekaterinburg, Russian Federation)
• Gromilov S. (A.V. Nikolaev Institute of Inorganic Chemistry SB RAS, 3 Ac. Lavrentiev, Novosibirsk, Russian Federation)
• Panchenko A. (A.V. Nikolaev Institute of Inorganic Chemistry SB RAS, 3 Ac. Lavrentiev, Novosibirsk, Russian Federation)
• Pokhilenko N. (V.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences, 3 Ac. Koptyug Ave., Novosibirsk, Russian Federation)
• Litasov K. (V.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences, 3 Ac. Koptyug Ave., Novosibirsk, Russian Federation)

• Scopus