12.06.2017 Публикация пользователей

Journal of Luminescence 192 (2017) 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 192 (2017) 40–46

DOI: 10.1016/j.jlumin.2017.06.024

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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 and temperature 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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02.06.2017 в РЦ ОЛМИВ состоялся визит делегации Харбинского политехнического университета

2 июня 2017 года в РЦ ОЛМИВ состоялся визит делегации Харбинского политехнического университета в сопровождении директора НП СПбГУ Микушева С.В.
Состав делегации:

-     Чжоу Юй (ректор Харбинского политехнического университета)

-    Чжао Хунжуй (начальник юридического института  Харбинского политехнического университета)

-     Мэй Вэньчжан (начальник департамента по работе с РФ и странами СНГ).

В заключении встречи проф. Туник С.П. рассказал гостям о работе своей научной группы.
Во встрече приняли участие  доц. Грачева Е.В. и доц. Маньшина А.А.

 
 

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17.05.2017 Публикация пользователей

Journal of Inorganic and General Chemistry

Igor D. Strelnik, Elvira I. Musina, Svetlana N. Ignatieva, Anna S. Balueva, Tatiana P. Gerasimova, Sergey A. Katsyuba, Dmitry B. Krivolapov, Alexey B. Dobrynin, Christoph Bannwarth, Stefan Grimme, Ilya E. Kolesnikov, Andrey A. Karasik, Oleg G. Sinyashin

«Pyridyl Containing 1,5-Diaza-3,7-diphosphacyclooctanes as Bridging Ligands for Dinuclear Copper(I) Complexes»

Journal of Inorganic and General Chemistry

DOI: 10.1002/zaac.201700049

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1,5-bis(R)-3,7-bis[2-(pyridine-2′-yl)ethyl)-1,5-diaza-3,7-diphosphacyclooctanes 1 and 2 and their copper(I) complexes 3 and 4 were developed. The butterfly-shaped copper-iodide core and unusual P,N-chelate and P,P-bridged coordination mode of the heterocyclic ligand in the dinuclear complexes 3 and 4 were revealed. Complexes 3 and 4 display emission in green range of spectra, with lifetimes in a microsecond domain and quantum yields of luminescence in solid-state up to 38 %. Thermochromic effects found for the phosphorescence of 4 in solutions are ascribed to rigidochromism.

 

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02.05.2017 экскурсия для группы студентов физического факультета

 

2 мая 2017 года состоялась экскурсия для группы студентов физического факультета под руководством доцента кафедры молекулярной биофизики и физики полимеров к.ф.- м.н. Пастон Софьи Владимировны.

 
 

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27.04.2017 Публикация пользователей

Applied Surface Science 416 (2017) 988–995

A.A. Ionin, S.I. Kudryashov, A.O. Levchenko, L.V. Nguyen, I.N. Saraeva, A.A. Rudenko, E.I. Ageev, D.V. Potorochin, V.P. Veiko, E.V. Borisov, D.V. Pankin, D.A. Kirilenko, P.N. Brunkov

«Correlated topographic and structural modification on Si surface during multi-shot femtosecond laser exposures: Si nanopolymorphs as potential local structural nanomarkers»

Applied Surface Science 416 (2017) 988–995

DOI: 10.1016/j.apsusc.2017.04.215

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High-pressure Si-XII and Si-III nanocrystalline polymorphs, as well as amorphous Si phase, appear consequently during multi-shot femtosecond-laser exposure of crystalline Si wafer surface above its spallation threshold along with permanently developing quasi-regular surface texture (ripples, microcones), residual hydrostatic stresses and subsurface damage, which are characterized by scanning and transmission electron microscopy, as well as by Raman micro-spectroscopy. The consequent yields of these structural Si phases indicate not only their spatially different appearance, but also potentially enable to track nanoscale, transient laser-induced high-pressure, high-temperature physical processes – local variation of ablation mechanism and rate, pressurization/pressure release, melting/resolidification, amorphization, annealing – versus cumulative laser exposure and the related development of the surface topography.

 

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