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by D. S. Prokuratov, A. S. Davtian, O. S. Vereshchagin, N. S. Kurganov, A. A. Samokhvalov, D. V. Pankin, A. V. Povolotckaia, A. A. Shimko, A. A. Mikhailova, P. A. Somov, V. A. Parfenov

Optical and Quantum Electronics, 52(2), 113, 1-12

https://doi.org/10.1007/s11082-020-2231-z

Подробнее: 01.02.2020 Laser cleaning of archaeologically corroded iron objects with inlays

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Journal of Luminescence Volume 192, December 2017, Pages 40-46

I.E. Kolesnikov, A.A. Kalinichev, M.A. Kurochkin, D.V. Mamonova, E.Yu. Kolesnikov, A.V. Kurochkin, E. Lähderanta, M.D. Mikhailov

New strategy for thermal sensitivity enhancement of Nd3+-based ratiometric luminescence thermometers

Journal of Luminescence Volume 192, December 2017, Pages 40-46.

DOI: 10.1016/j.jlumin.2017.06.024

Accurate luminescence thermal sensing using nanophosphors that operate within biological windows is of great interest in bio- and nanomedicine. Here, we show that Nd³⁺-doped YVO₄ NPs can act as nanothermometers in the second biological window upon 808 nm excitation. Significant enhancement of thermal sensitivity andtemperature resolution was achieved by optimal choice of wavelengths for ratiometric thermal calibration. It was concluded that thermal calibration should be calculated using integral intensities. The obtained temperature uncertainty together with the emission and excitation lying in the biological windows open the venue to the possible application of Nd³⁺-doped YVO₄ NPs for real time sub-tissue luminescence thermal sensing with a subdegree resolution.

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Сотрудники ресурсного центра Поволоцкая Анастасия Валерьевна и Панькин Дмитрий Васильевич в начале декабря посетили центр реставрации и консервации музеев Франции (Centre de Recherche et de Restavration des Musées de France http://en.c2rmf.fr/).

Подробнее: 06.12.2017 Визит сотрудников ресурсного центра в лаборатории Лувра

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Journal of Molecular Structure Volume 1149, December 2017, Pages 323-331

Anton Nikolaev, Ilya Kolesnikov, Olga Frank-Kamenetskaya, Maria Kuzmina

Europium concentration effect on сhаracteristics and luminescent properties of hydroxyapatite nanocrystalline powders

Journal of Molecular Structure Volume 1149, December 2017, Pages 323-331

DOI: 10.1016/j.molstruc.2017.08.005

Series of Eu-apatites were synthesized by precipitation from aqueous solutions with the Eu/Ca atomic ratio from 0.5% to 5% at T = 90 ˚C. Resulting precipitates were studied using different experimental techniques including X-ray powder diffraction, infrared and raman spectroscopy, scanning elecrton microscopy, EDX and photoluminescent spectroscopy. Eu-doped Ca-deficit nanosized non-stoichiometric hydroxyapatite with high water content has been obtained throughout the experiment. Europium content in the synthesized apatites reaches 0.24 apfu (Eu/Ca = 2.5%). Relations between Eu content is the solution and precipitate have been established. It was shown that Eu-monacite starts to precipitate as secondary phase at Eu/Ca ratio in starting solution 1% or higher. Maximum luminescence is observed in apatite with ~2% Eu/Ca ratio (which equals to ~0.2 apfu and corresponds to 3% Eu/Ca ratio in the starting solution). As an important and brand-new result, apatite with 2% Eu/Ca ratio can be considered as the most appropriate material for the producing biolabels for luminescent research in medicine and biology.

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Семинар был проведен в рамках Международной научно-практической конференции АУИПИК – СПбГУ: «Наследие, наука и технологии»

В числе участников семинара:

Паскаль Лево (Pascal Liévaux) руководитель Департамента управления исследования и научной политики Генеральной Дирекции наследия Министерства культуры Франции

Мишель Меню (Michel Menu), директор Департамента исследований Лаборатории C2RMF Министерства культуры Франции, Париж

Ласка Татьяна Владимировна, старший преподаватель кафедры изобразительного искусства СПбГУ

Курганов Николай Сергеевич, старший преподаватель кафедры реставрации СПбГУ.