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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Frolov G. I., Yakovchuk V. Y., Seredkin V. A., Iskhakov R. S., Stolyar S. V., Polyakov V. V.
Заглавие : Unidirectional anisotropy in ferromagnetic-ferrimagnetic film structures
Место публикации : Tech. Phys.: AMER INST PHYSICS, 2005. - Vol. 50, Is. 12. - P1605-1610. - ISSN 1063-7842, DOI 10.1134/1.2148562
Примечания : Cited References: 25
Предметные рубрики: BILAYERS
SENSORS
Аннотация: A mechanism of unidirectional anisotropy formation in an exchange-coupled ferromagnetic-ferrimagnetic film structure with orthogonal effective magnetizations in the layers is investigated. The reason for unidirectional anisotropy is the magnetic heterogeneity of the ferrimagnetic layer in the compensation range. Magnetization reversal in the magnetically soft layer of an (REE-transition metal)/NiFe film structure is discussed based on a model of uniform rotation of magnetization. It is found that unidirectional anisotropy sharply decreases the magnetic noise level in the magnetically soft layer. The field of application of these materials is outlined. (c) 2005 Pleiades Publishing, Inc.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Guan M., Hao J., Qiu L., Molokeev M. S., Ning L., Dai Zh., Li G.
Заглавие : Two-dimensional hybrid perovskite with high-sensitivity optical thermometry sensors
Колич.характеристики :8 с
Место публикации : Inorg. Chem. - 2024. - Vol. 63, Is. 8. - P.3835-3842. - ISSN 00201669 (ISSN), DOI 10.1021/acs.inorgchem.3c04140. - ISSN 1520510X (eISSN)
Примечания : Cited References: 37. - This work was supported by the National Natural Science Foundation of China (Grant Nos. 52072349, 52172162, 12374386, and 11974022). Z.D. acknowledges support from the Fundamental Research Funds for the Central Universities, China University of Geosciences (Wuhan) (No.162301202610), the Natural Science Foundation of Guangdong Province (2022A1515012145), and Shenzhen Science and Technology Program(JCYJ20220530162403007). G.L. acknowledges support from the Natural Science Foundation of Zhejiang Province (LR22E020004). M.M. acknowledges the support from the Ministry of Science and High Education of Russian Federation (Project No. FSRZ-2023-0006)
Аннотация: Optical thermometry has gained significant attention due to its remarkable sensitivity and noninvasive, rapid response to temperature changes. However, achieving both high absolute and relative temperature sensitivity in two-dimensional perovskites presents a substantial challenge. Here, we propose a novel approach to address this issue by designing and synthesizing a new narrow-band blue light-emitting two-dimensional perovskite named (C8H12NO2)2PbBr4 using a straightforward solution-based method. Under excitation of near-ultraviolet light, (C8H12NO2)2PbBr4 shows an ultranarrow emission band with the full width at half-maximum (FWHM) of only 19 nm. Furthermore, its luminescence property can be efficiently tuned by incorporating energy transfer from host excitons to Mn2+. This energy transfer leads to dual emission, encompassing both blue and orange emissions, with an impressive energy transfer efficiency of 38.3%. Additionally, we investigated the temperature-dependent fluorescence intensity ratio between blue emission of (C8H12NO2)2PbBr4 and orange emission of Mn2+. Remarkably, (C8H12NO2)2PbBr4:Mn2+ exhibited maximum absolute sensitivity and relative sensitivity values of 0.055 K–1 and 3.207% K–1, respectively, within the temperature range of 80–360 K. This work highlights the potential of (C8H12NO2)2PbBr4:Mn2+ as a promising candidate for optical thermometry sensor application. Moreover, our findings provide valuable insights into the design of narrow-band blue light-emitting perovskites, enabling the achievement of single-component dual emission in optical thermometry sensors.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Baron F. A., Shanidze L. V., Rautskiy M. V., Mikhlin Yu. L., Lukyanenko A. V., Konovalov S. O., Zelenov F. V., Shvets P. V., Goikhman A. Yu., Volkov N. V., Tarasov A. S.
Заглавие : Titanium oxynitride thin films wide temperature range sensors
Место публикации : Tech. Phys. Lett. - 2022. - Vol. 48, Is. 10. - P.74-77. - ISSN 10637850 (ISSN), DOI 10.21883/TPL.2022.10.54805.19292. - ISSN 10906533 (eISSN)
Примечания : Cited References: 14. - This study was supported financially by the Russian Foundation for Basic Research, the Government of Krasnoyarsk Krai, and the Krasnoyarsk Krai Foundation of Science as part of scientific project No. 20-42-240013. The Rutherford backscattering study of samples was performed at Research and Education Center ” Functional Nanomaterials“ of the Baltic Federal University with financial support from the Ministry of Science and Higher Education of the Russian Federation (project FZWN-2020-0008)
Аннотация: The temperature dependence of the resistivity of titanium oxynitride TiNxOy thin films with different oxygen and nitrogen content obtained by atomic layer deposition was investigated. We found that the resistance of all films monotonically decreased with increasing temperature and varied within a wide range depending on the chemical composition and thickness of the film. The technology for obtaining a compact temperature sensor of wide range from helium to room temperature based on 40 nm thick TiN0.87O0.97 is presented.
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Вид документа : Статья из сборника (выпуск продолж. издания)
Шифр издания :
Автор(ы) : Igumenov A. Y., Melnikov I. V., Afanasiev A. A., Popova S. S., Lukinykh S. N., Tambasov I. A.
Заглавие : Temperature and vibration OTDR measurements with a single mode-multimode-single mode fiber structure
Коллективы : Optical Fibers and Sensors for Medical Diagnostics, Treatment and Environmental Applications
Место публикации : Proc. SPIE. - 2023. - Vol. 12372: Optical Fibers and Sensors for Medical Diagnostics, Treatment and Environmental Applications XXIII 2023 (28 - 30 January 2023, San Francisco, California, United States) Conference code: 187531. - Ст.123720P. - , DOI 10.1117/12.2646114
Примечания : Cited References: 31
Аннотация: We suggest a prototype of a fiber-optic sensor system that is based on a simple singlemode-multimode-singlemode fiber structure and serial OTDR. The sensor has simple structure, made of affordable components, exploits easy measuring principle, immunes to EMI or RFI, and has confident response to measure key environment variables at a very long span. From the experimental results, the relationship between the temperature of water and output signal of the temperature sensor can be determined. After some maths, we can determine the temperature of the water by measuring the optical power loss of the at the SMS structure in a temperature range of 30 to 70 °C. This SMS structure is shown to carry out vibration measurement for 0.1-60 Hz frequencies with high accuracy. The OTDR exploited allows carrying out far-field measurements when SMS structure is spliced in long fiber-optic link.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Balaev D. A., Prus A. G., Shaykhutdinov K. A., Gokhfeld D. M., Petrov M. I.
Заглавие : Study of dependence upon the magnetic field and transport current of the magnetoresistive effect in YBCO-based bulk composites
Место публикации : Supercond. Sci. Technol.: IOP PUBLISHING LTD, 2007. - Vol. 20, Is. 6. - P495-499. - ISSN 0953-2048, DOI 10.1088/0953-2048/20/6/002
Примечания : Cited References: 25
Предметные рубрики: CERAMIC SUPERCONDUCTORS
DISSIPATION
TRANSITION
SENSORS
MOTION
FILMS
Ключевые слова (''Своб.индексиров.''): current voltage characteristics--lorentz force--magnetic field effects--magnetic flux--magnetic sensors--magnetoresistance--intergrain boundaries--magnetic field sensor devices--magnetoresistance curves--magnetoresistive properties--yttrium barium copper oxides
Аннотация: The magnetoresistive properties of bulk YBCO + CuO and YBCO + BaPb0.75Sn0.25O3 composites for different orientations of external magnetic field H and macroscopic transport current j have been measured. These composites exhibit large magnetoresistance in weak magnetic fields ( 100 Oe), which makes them promising candidates for practical application in magnetic field sensor devices. The difference between.( T) dependences, magnetoresistance curves R( H) and current - voltage characteristics measured for H parallel to j and H || j is observed indicating the presence of the Lorentz- force- dependent dissipation in the composites. Angular dependences of magnetoresistance R(theta) ( where theta
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Svalov A. V., Gorkovenko A. N., Larranaga A., Volochaev M. N., Kurlyandskaya G. V.
Заглавие : Structural and magnetic properties of FeNi films and FeNi-based trilayers with out-of-plane magnetization component
Место публикации : Sensors. - 2022. - Vol. 22, Is. 21. - Ст.8357. - ISSN 14248220 (ISSN), DOI 10.3390/s22218357
Примечания : Cited References: 50. - This research was funded by the Russian Science Foundation (RSF), project no. 22-29-00980, https://rscf.ru/en/project/22-29-00980/ and in part by the Research Groups of the UPV-EHU
Аннотация: FeNi films of different thickness and FeNi/(Fe, Co)/FeNi trilayers were prepared by magnetron sputtering deposition onto glass substrates. The permalloy films had a columnar microstructure. The detailed analysis of the magnetic properties based on the magnetic and magneto-optical measurements showed that at thicknesses exceeding a certain critical thickness, hysteresis loops acquire a specific shape and the coercive force of the films increase sharply. The possibility of the estimation of the perpendicular magnetic anisotropy constant using the Murayama equation for the thickness dependence of saturation field was demonstrated. The results of studies of the structural and magnetic properties of FeNi films laminated by Fe and Co spacers with different thickness are presented.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Igumenov A. Y., Mel'nikov I. V., Afanas'ev A. A., Popova S. S., Lukinykh S. N., Tambasov I. A.
Заглавие : Reflectometric measurement of temperature using a single-mode–multimode–single-mode fiber-optic structure
Место публикации : Tech. Phys. Lett. - 2022. - Vol. 48, Is. 5. - P.227-229. - ISSN 10637850 (ISSN), DOI 10.1134/S1063785022080016. - ISSN 10906533 (eISSN)
Примечания : Cited References: 20
Аннотация: The possibility of using a single-mode–multimode–single-mode fiber-optic structure for remote measurement of temperature by an optical reflectometer is established. Experiments on measuring temperature using a structure with a multimode-fiber length of 10 mm in the temperature range of 30–70°C at wavelengths of 1310 and 1550 nm have been performed. The total length of the single-mode fiber line for reflectometric measurements was 20 km.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Dong R., Yao Y., Li D., Zhang H., Li W., Molokeev M. S., Liu Y., Lei B.
Заглавие : Ratio fluorescent hybrid probe for visualized fluorescence detection of H2O2 in vitro and in vivo
Место публикации : Sens. Actuators B: Chem. - 2020. - Vol. 321. - Ст.128643. - ISSN 09254005 (ISSN), DOI 10.1016/j.snb.2020.128643
Примечания : Cited References: 65. - The present work was supported by the National Natural Science Foundations of China (Grant No. 21671070 ), the project supported by the GDUPS (2018) for Prof. Bingfu LEI, the Project for Construction of High-level University in Guangdong Province of China, the Guangzhou Science & Technology Project , China (No. 201707010033 ), the Special Funds for the Cultivation of Guangdong College Students’ Scientific and Technological Innovation (No. 201910564035 ), and the National Undergraduate Innovation and Entrepreneurship Training Program granted for Riyue Dong
Аннотация: A silicon oxide quantum dots (Si-O QDs) and Ag nanoclusters hybrid nanosensing probe with dual-emission and small nanocrystals that acts as an “off-on” ratio fluorescent probe for hydrogen peroxide (H2O2) detection was developed. The probe was used to measure the H2O2 concentration generated by mitochondria in vitro via recording the I455/I680 fluorescence ratio. Furthermore, this hybrid probe was applied to monitor the wound-induced H2O2 in lettuce leaf, and realized the visualized fluorescence qualitative detection H2O2 in vivo via laser scanning confocal microscope. The working mechanism of the probe is also investigated. Inner filter effect (IFE) estimation, Fourier transform infrared (FTIR) spectra and high-resolution transmission electron microscopy (HRTEM) images were applied to study the quenching mechanism and recovering reason of Si-O QDs fluorescence. The results show that the blue fluorescence of Si-O QDs can be quenched by Ag NCs via the IFE and fluorescent resonance energy transfer (FRET) effect. After adding H2O2, the surface groups of Ag NCs was changed and the IFE and FRET effects between the Si-O QDs and Ag NCs are disabled, thus the quenched Si-O QDs luminescence can be regularly recovered.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Popov A. K., Myslivets S. A.
Заглавие : Remote sensing with nonlinear negative-index metamaterials
Коллективы : International conference on optical fibre sensors , International Conference on Optical Fibre Sensors (23; 2014 ; Jun. ; 2 - 6; Santander, Spain)
Место публикации : Proceedings of SPIE - The International Society for Optical Engineering: SPIE-Int. Soc. Optical Engineering, 2014. - Vol. 9157. - Ст.91573B. - ISSN 978-162841175-1, DOI 10.1117/12.2059728. - ISSN 0277-786X
Примечания : Cited References: 15. - This work was supported in parts by the Air Force Office of Scientific Research (Grant No FA950-12-1-298), by the National Science Foundation (Grant No ECCS-1346547) and by the Presidium of the Siberian Branch of the Russian Academy of Sciences (Grants No. 43 and No. 101).
Предметные рубрики: PARAMETRIC AMPLIFICATION
2ND-HARMONIC GENERATION
Ключевые слова (''Своб.индексиров.''): optical remote sensing--optical frequency up-conversion and parametric amplification--negative refractive index metamaterials--backward electromagnetic waves--infrared nonlinear optical microsensors
Аннотация: A concept of the remotely actuated and interrogated four-wave mixing photonic sensor, which employs the negative-index photonic materials, is described. Unique electromagnetic properties of such a metamaterial enable enhancement of frequency conversion and redirection of the signals which carry important information for environmental probing. Four-wave mixing process allows for independent engineering of resonantly enhanced optical nonlinearities and negative refractive index. © 2014 SPIE.
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Krasnov, Pavel, Ivanova, Victoria, Klyamer, Darya, Fedorov A. S., Basova, Tamara
Заглавие : Phthalocyanine-carbon nanotube hybrid materials: Mechanism of sensor response to ammonia from quantum-chemical point of view
Место публикации : Chemosensors. - 2022. - Vol. 10, Is. 11. - Ст.479. - ISSN 22279040 (eISSN), DOI 10.3390/chemosensors10110479
Примечания : Cited References: 64. - Studies of periodic hybrid materials were performed under the financial support of the Russian Science Foundation (grant 20-12-00175). Studies of the interaction parameters of ammonia molecules with phthalocyanines were carried out under the financial support of the Ministry of Science and Higher Education of the Russian Federation (N 121031700314-5)
Аннотация: Quantum chemical calculations of the geometric and electronic structure of periodic hybrid compounds representing carbon nanotubes (10,0) with zinc phthalocyanine molecules ZnPc-xpy (x = 0, 1, 2, 4) on their surface and their interaction with ammonia were carried out to explain the dependence of the sensor response of the hybrid materials to ammonia on the number of substituents in the ZnPc-xpy macrocycle and to clarify the nature of the interaction between ammonia and phthalocyanine molecules. It was found that the key feature of these materials, which determines their sensor response toward ammonia, is the presence of an impurity band in the band gap of a carbon nanotube, formed by the orbitals of macrocycle atoms. When ammonia adsorbs through the formation of hydrogen bonds with the side atoms of phthalocyanine, the energy of this impurity band decreases. As a consequence, the electron population of the conduction band and, accordingly, the electrical conductivity of the hybrid materials become lower. Moreover, with an increase in the number of oxypyrene substituents in ZnPc-xpy, the interaction energy of ammonia increases and, as a result, the decrease in the energy of the impurity band becomes higher. These facts may explain recent experimental measurements of the parameters of the sensor response of similar hybrid materials to ammonia, where, in particular, it was shown that the sensor response is reversible, and its value increases with an increase in the number of oxypyrene substituents in the phthalocyanine macrocycle.
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