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Sensors and Actuators B: Chemical Volume 243, May 2017, Pages 338-345

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

Nd³⁺ single doped YVO4 nanoparticles for sub-tissue heating and thermal sensing in the second biological window

Sensors and Actuators B: Chemical Volume 243, May 2017, Pages 338-345

DOI: 10.1016/j.snb.2016.12.005

The real controlled photothermal therapies demand designing multifunction systems capable of simultaneous heating and local thermal sensing. In this work, we report on neodymium doped yttrium vanadate nanoparticles acting as nanoheaters and nanothermometers at the same time under 808 nm single beam excitation. Heating is produced due to the nonradiative processes, whereas thermal sensing is obtained by luminescence intensity ratio between Stark sublevels lying in the second biological window. The influence of Nd³⁺ content on both heating and sensing abilities was studied. The potential application of YVO₄:Nd³⁺ nanoparticles for deep tissue fluorescence bioimaging and controlled photothermal therapies is demonstrated.

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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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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

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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24 апреля состоялся совместный семинар РЦ ОЛМИВ, Кафедры лазерной химии и лазерного материаловедения и представителей ИХС РАН им. Гребенщикова.

На семинаре выступили:

О.А.Шилова, д.х.н., Институт химии силикатов  им. Гребенщикова и  В.Н.Щелушкин, рук. технологической группы, группа компаний Солэкс, г. Рязань.

Обсуждались вопросы выполнения совместных научно-исследовательских работ в области исследования новых материалов, в частности, для солнечной энергетики.

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Polyhedron Volume 130, Pages 176-183

Y. Kondratenko, V. Fundamenskya, I. Ignatyev, A. Zolotarev, T. Kochina, V. Ugolkov

Synthesis and crystal structure of two zinc-containing complexes of triethanolamine

Polyhedron Volume 130, Pages 176-183

DOI: 10.1016/j.poly.2017.04.022

Two new zinc-containing complexes [Zn₂(TEA)(C₆H₅COO)₃] (1) and ([Zn(TEA)(H₂O)₂]SO₄)·H₂O (2) were synthesized and characterized by IR spectroscopy, elemental analysis, DSC and TG analysis. Their structure was determined by single-crystal X-ray diffraction. In the binuclear, mixed-ligand [Zn₂(TEA)(C₆H₅COO)₃] complex, one zinc atom is six-coordinated by nitrogen and three oxygen atoms of tetradentate triethanolamine (TEA) and two oxygen atoms of two different benzoate ligands, forming the distorted octahedron of the ZnNO₅ type. The second zinc atom is five-coordinated, forming the distorted trigonal bipyramid. Two zinc atoms are bridged by two carboxylate groups of two benzoate ligands and one oxygen atom of the deprotonated hydroxyethyl group of TEA. Cationic complex 2 consists of [Zn(TEA)(H₂O)₂]²⁺ cations and SO₄^2- anions. The coordination polyhedron around the zinc atom corresponds to a distorted octahedron (ZnNO₅ type). The TEA ligand is tetradentately coordinated to the cation, forming three chelate rings. The coordination sphere of the Zn cation is completed by two aqua ligands.