Proceedings of the 2017 IEEE 7th International ...

Ministry of Education and Science of Ukraine Sumy State University

Proceedings of the 2017 IEEE 7th International Conference on Nanomaterials: Applications & Properties (NAP-2017)

2017, Part 4

Zatoka, Ukraine September 10–15, 2017 Founded in 2012

Sumy Sumy State University 2017

2017 IEEE 7th International Conference on Nanomaterials: Applications & Properties (NAP – 2017)

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IEEE Catalog Number: CFP17F65-ART ISBN: 978-1-5386-2810-2

Sumy State University 2, Rymskogo-Korsakova St., 40007 Sumy, Ukraine Copyright © 2017 by the Institute of Electrical and Electronics Engineers, Inc. All rights reserved.

SUMY STATE UNIVERSITY

Proceedings of the 2017 IEEE 7th International Conference on Nanomaterials: Applications & Properties (NAP-2017) 2017, Part 4 EDITORIAL BOARD Editor-in-chief Alexander D. Pogrebnjak (Ukraine) Deputy Editor Valentine Novosad (USA) Consulting Editors Pawel Zukowski (Poland) Serhiy I. Protsenko (Ukraine) Managing Editor Yurii Shabelnyk (Ukraine) INTERNATIONAL SCIENTIFIC ADVISORY COMMITTEE Oleg Lupan (Moldova) Jindrich Musil (Czech Republic) Jean Roncali (France) Paul J. Chen (Singapore) Bernd Rauschenbach (Germany) Eva Majkova (Slovakia) Masaki Mizuguchi (Japan) Victor Sontea (Moldova) Nikolay Azarenkov (Ukraine) Cyril Aymonier (France) Andriy Kovalenko (Canada) Marta Marszalek (Poland) Yury Gogotsi (USA)

Masakatsu Murakami (Japan) Rodolphe Antonie (France) Leonid F. Sukhodub (Ukraine) Sergei Nepijko (Germany) Jerzy Zuk (Poland) Paulo J. Ferreira (USA) Muhammad Bashouti (Germany) Gregory Abadias (France) Ivan Yu. Protsenko (Ukraine) Fadei F. Komarov (Belarus) Stan Veprek (Germany) Volodymyr I. Ivashchenko (Ukraine)

LOCAL ORGANIZING COMMITTEE Alexander D. Pogrebnjak (Ukraine) Serhiy I. Protsenko (Ukraine) Yurii Shabelnyk (Ukraine) Aleksey A. Drozdenko (Ukraine) Andriy Shypylenko (Ukraine) Artem A. Bagdasaryan (Ukraine)

Oleksandr V. Bondar (Ukraine) Kateryna Smyrnova (Ukraine) Margarita Lisovenko (Ukraine) Katerina Belovol (Ukraine) Yaroslav Kravchenko (Ukraine) Vlad Rogoz (Ukraine)

IEEE Ukraine Section Conference Coordinator Ievgen Pichkalov (Ukraine) Anton A. Popov (Ukraine)

Table of Contents 2017, Part 4 Track:

Nanomaterials for Biomedicine

NanoMatrix3D® Technology in Development of Nanofibrouse Scaffolds: Biomedical Evaluation Pogorielov M., Hapchenko A., Deineka V., Vodseďálková K., Berezkinová L., Vysloužilová L., Klápšťová A., Erben J., Oleshko O. ........................................................................................................... 04NB01 Effect of Peripheral Administration of Chemically-synthesized Silver Nanoparticles (Ag-NP) on of Serum Malondialdehyde (MDA) and Selected Enzymes in Rat Model Lotfi A., Ghavidel Aghdam E., Narimani-Rad M. ..................................................................................... 04NB02 Development of a Biosensor for Selective Detection of Phytopathogenic Pythiums Yamaguchi K., Uriu Yo., Kageyama K., Shimizu M. ................................................................................. 04NB03 Investigation to Sensitive Determination of Glucose Using a Hybrid System Based on Graphene and Nickel Nanoparticles Incebay H., Bilici E., Yazicigil Z. ................................................................................................................ 04NB04 Electrochemical H2O2 Sensor Based on Graphene Oxide-iron Oxide Nanoparticles Composite Yildiz S., Bas S.Z., Ozmen M..................................................................................................................... 04NB05 Gold-based Nano-adjuvants Yavuz E., Bagriacik E.U. ........................................................................................................................... 04NB06 ZnS Quantum Dots Encapculated with Alginate: Synthesis and Antibacterial Properties Hrebenyk L., Ivakhniuk T., Sukhodub L. ................................................................................................... 04NB07 Complex of Synthetic 4-Thiazolidinone Derivatives with PEG-containing Polymeric Nanocarrier Improve of Biocompatibility and Protects Against Toxicity in Laboratory Rats Kobylinska L.I., Skorohyd N., Panchuk R., Boiko N., Stoika R., Zaichenko A., Zіmenkovsky B.................. 04NB08 Mg Alloys in-vitro Degradation in Simulated Body Fluid and Citrate Solutions Pogorielov M., Husak Ye., Solodovnik O., Oleshko O., Kozik Ye., Yusupova A., Mishchenko O. .............. 04NB09 Antibacterial Activity of the New Copper Nanoparticles and Cu NPs/Chitosan Solution Pogorielov M., Holubnycha V., Ivashchenko O., Kalinkevych O., Peplinska B., Jarek M., Korniienko V. ........................................................................................................................................... 04NB10 Rationale and Medical Prospects of Nanostructured Materials Based on Hydroxyapatite Roshchupkin A., Sukhodub L.F., Sukhodub L.B., Vysotckiy I.U., Gluschenko N.V. .................................... 04NB11 Development of Synthesis Technologies, Study of Physicochemical Properties of Apatite-Biopolymer Nanostructured Coatings on Activated Metal Substrates for Medical Implants Sukhodub L.F., Sukhodub L.B. ................................................................................................................. 04NB12 Liquid Crystals as an Active Medium of Enzymes Optical Sensors Vistak M., Dmytrah V., Fafula R., Diskovskyi I., Mykytyuk Z., Sushynskyi O., Barylo G., Horbenko Yu............................................................................................................................................ 04NB13 Magnesium-based Matrix composites Reinforced with Nanoparticles for Biomedical Applications Dyadyura K., Sukhodub L.F...................................................................................................................... 04NB14

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Biosynthesis of Linden Protected Silver Nanoparticles and their Safe Application as a Catalyst for Reduction of Methylene Blue Hydrate Pehlivan E., Ünver Ya., Altun T., Hussain M., Avcı A. .............................................................................. 04NB15 Photoluminescence ZnO Nanorod Biosensors for Medical and Food Safety Applications Viter R., Riekstina U., Pleiko K., Savchuk M., Poletaev N., Ramanavicius A. ........................................... 04NB16 Use of Calix[4]Arene Nanofibers in the Treatment of MCF-7 Breast Cancer Cells Ertul S., Ozcan F. ..................................................................................................................................... 04NB17 MCF-7 Breast Cancer Cell Applications of the Morpholino Grouped p-tert-Butylcalixarene Nanofibers Ahmed M., Ertul S., Ozcan F. ................................................................................................................... 04NB18 Doxorubicin Loaded Iron Oxide Nanoparticles-Albumin Bioconjugate as Drug Carrier System Cagil E.M., Akceylan E., Yildiz S. .............................................................................................................. 04NB19 Preparation of Silver and Copper Nanoparticles for Biomedical Application Mussabayeva B., Murzagulova K., Aripzhanova Z., A. Klivenko A. ......................................................... 04NB20 Synthesis and Properties of Nix/Au1-x Nanotubes Kozlovskiy A., Zdorovets M., Shumskaya A., Kanyukov E., Kutuzau M. ................................................... 04NB21 Assymetric Block Copolymers Comprising Interacting Blocks for Drug Delivery Permyakova N.M., Zheltonozhskaya T., Kunitskaya L., Beregova T., Klimchyk O. .................................. 04NB22 Investigation of Antiradiation and Anticancer Efficiency of Nanodiamonds on Rat Erythrocytes Batyuk L., Kizilova N., Berest V. ............................................................................................................... 04NB23 Calixarene Nanofiber Design for Human Colon Cancer 3D-Cell Culture Uyar Arpaci P., Ozcan F., Agac M., Ertul S. ............................................................................................. 04NB24 In vitro Cytotoxicity of Cerium Dioxide Nanoparticles and Its Effect on Nitrite-ion Production in Normal and Transplantable Cell Lines Shydlovska O.A., Zholobak N.M. ............................................................................................................. 04NB25 Improved Anticancer Efficacy of p-tert-butylcalix[4]arene through Surface Modifications Uyar Arpaci P., Ozcan F., Gok E., Ertul S.................................................................................................. 04NB26 Evaluation of Biocompability of Supramolecular Calixarene on L-929 by Real Time Cell Analysis Uyar Arpaci P., Ozcan F., Omar N., Ertul S. ............................................................................................. 04NB27 Carbon Nanostructures for Electrochemical Sensors Mikoliunaite L., Geceviciute M., Voronovic J., Paklonskaitė I., Barkauskas J., Ramanaviciene A., Ramanavicius A. ................................................................................................................................ 04NB28 Optical Sensors Based on Electrochromic Conducting Polymers Gicevičius M., Mikoliūnaitė L., Ramanavičius A., Ramanavičienė A. ...................................................... 04NB29 NanoMatrix3D® Nanofibrous Scaffolds for Tissue Engineering Approaches Vasyliev R., Zubov D., Rodnichenko A., Gubar O., Zlatska A., Gordienko I., Pogorielov M., Deineka V., Oleshko O., Vodseďálková K., Berezkinová L. ...................................................................... 04NB30 Using Impedance Porous GaAs-based for Biomedical Gas Sensor Oksanich A.P., Pritchin S.E., Kogdas M.G., Holod A.G., Milovanov Y.S., Gavrilchenko I.V....................... 04NB31

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Track:

Nanomaterials for Electronics, Spintronics and Photonics

Tunneling of Wave Packages Through Resonant Quantum Systems Filonenko N., Ivanov N.A. ....................................................................................................................04NESP01 Properties of Stimulated Emission of the PM567 dye in the Pores of Anodized Aluminum Oxide Aimukhanov A.K., Yessimbek А.М., Ibrayev N.Kh. ..............................................................................04NESP02 Investigation of the Influence of Gold Nanoparticles on Stimulated Luminescence of Phenylamine 160 in Ethanol Aimukhanov A.K., Ibrayev N.Kh., Yessimbek А.M., Yusupova J.B. .......................................................04NESP03 Method of Analysis Errors of Measurement Conversion of Impedance Spectroscopy with Activation Nonharmonic Signals Vezyr F., Barylo G., Holyaka R., Vistak M., Virt V., Hotra Z. ................................................................04NESP04 Physical Mechanism of Resistive Switchings in Nanoscale Contacts Based on Complex TransitionMetal Oxides Shapovalov A.P., Prikhna T., Revenko Yu., Belogolovskii M., Kordyuk A. ............................................04NESP05 Exciton-Plasmon Interaction and Nonlinear-Optical Properties of Zn0.8Co0.2O/Au Nanoparticles Composite Film Virt I., Gamernyk R.V., Malynych S.Z., Dziedzic A., Potera P., Wisz G. ................................................04NESP06 Improved Design Josephson Junctions with Hybrid Nanostructured Barriers Shaternik V.E., Shapovalov A., Prikhna T., Belogolovskii M., Suvorov O.Yu. .......................................04NESP07 Research of Photo Processes in Organic Objects with Participation of Nanoparticles of Silver Yermaganbetov K., Chirkova L., Makhanov K., Arinova Ye. ................................................................04NESP08 The Effect of Electric Field and Impurity on the Optical Properties of Multishell Quantum Dots Yakhnevych M.Ya., Holovatsky V.A. ....................................................................................................04NESP09 Boron Quasi-Planar Clusters Chkhartishvili L. ...................................................................................................................................04NESP10 Magnetoresistance of Doped Te:GaSb Whiskers Druzhinin A.O., Ostrovskii I.P., Khoverko Yu.N., Liakh-Kaguy N.S., Byldina Ya.A. ...............................04NESP11 Sol-gel Synthesis and Properties of Zinc Doped Tin Oxide (Zn-SnO2) Nanoparticles Kumar S., Bhutani R., Sirohi K., Singh V...............................................................................................04NESP12 Luminescence Centers in ZnWO4 Nanocrystals Maksimchuk P., Tupitsyna I., Hubenko K., Seminko V., Yakubovskaya A., Zvereva V., Malyukin Yu., Vovk O. .........................................................................................................................04NESP13 The Optimization of Functional Layers of Solar Cells Based on n-ZnMgO / p-CuO and n-ZnMgO / p-Cu2O Heterojunctions Diachenko O., Opanasyuk A., Kurbatov D., Dobrozhan O., Grynenko V. ............................................04NESP14 Energy spectrum of the Superlattice Consisting of the Alternating Strips of One-layer and Two-layer Graphene Konchenkov V., Zav'yalov D., Kryuchkov S. .........................................................................................04NESP15 Resistive Vapour Sensors Based on Polyethylene Glycol/Carbon Nanotubes Composites Porohnya O., Lobko Eu., Yakovlev Y. ...................................................................................................04NESP16

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Photonic Integration of Plasmonic Magneto-optical Waveguide and Si Nanowire Waveguide Zayets V., Saito H., Yuasa S. ............................................................................................................. 04NAESP17 Metal Nanofilms for Magnetic Field Sensors Vasyliev A., Bolshakova I., Kost Y., Prystopiuk O., Shurygin F., Bulavin M., Kulikov S., Kargin N., Strikhanov M., Vasil’evskii I., Kuech T......................................................................................... 04NAESP18 Low-temperature Properties of Niobium Oxynitride Thin Films Prepared by Non-balanced Magnetron Sputtering Odnodvorets L.V., Volkov S.O. .......................................................................................................... 04NAESP19 Comparison of Sensitivity of Ge9As9Se82 and Ge16As24Se60 Thin Films to Irradiation with Electron Beam Shylenko O., Bilanych V., Feher A., Rizak V., Komanicky V. .............................................................. 04NAESP20 Features of the Metamaterial Systems of a Range of Extremely High Frequencies Prokopchuk O., Ruban A. ................................................................................................................. 04NAESP21 Controlling the Optical and Electrical Properties of Ca 2+ Substituted SrTiO3 Nanopowders Synthesized Using Oxalate Precursor Strategy Rashad M.M., Rayan D.A., Roshdy R., El-Barawy K. ........................................................................ 04NAESP22 Perpendicular Exchange Bias Effect Investigation on x/CoO (PtCo, Ni) Ultra Thin Films Akoz M.E., Parlak U., Kosemen A., Erkovan M. ................................................................................ 04NAESP23 Electric-field Control of Magnetocaloric Effect in FeRh-based Composite Amirov A.A., Rodionov V.V., Rodionova V.V., Aliev A.M. ........................................................ 04NAESP24

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NAP-2017, 2017 IEEE 7th International Conference on Nanomaterials: Applications and Properties (NAP)

Metal Nanofilms for Magnetic Field Sensors N. Kargin, M. Strikhanov, I. Vasil’evskii

A. Vasyliev, I. Bolshakova, Y. Kost, O. Prystopiuk, F. Shurygin,

Institute of Functional Nuclear Electronics, National Research Nuclear University MEPhI, Moscow, Russian Federation

Magnetic Sensor Laboratory, Lviv Polytechnic National University, Lviv, Ukraine [email protected]

T. Kuech College of Engineering, University of Wisconsin-Madison, Madison, Wisconsin, USA

M. Bulavin, S. Kulikov Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, Dubna, Russian Federation

Abstract—The gold and molybdenum nanofilms were used as a material for sensitive layers of the Hall type magnetic field sensors intended to conducting a long-term magnetic diagnostics of the systems with high radiation loads. An in situ testing of sensors based on the metal nanofilms had been carried out in the fluxes of reactor neutrons. It was shown that the nanofilms electrophysical characteristics remain unchanged up to neutron fluence of ~ 1024 n/m2 at temperature of ~ 130 deg. C. Keywords—nanofilm; neutron irradiation

gold;

molybdenium;

Hall

II. SPECIFICITIES OF THE POLYCRYSTALLINE METAL NANOFILMS USE FOR MAGNETIC FIELD SENSORS For a number of reasons it is rational to use namely polycrystalline nanofilms as the sensing elements in the metal Hall sensors intended for operation in radiation environment. First of all, this caused by necessity to rise an output (Hall) sensor voltage UH that in simplest case can be expressed as [2]:

sensor;



UH = G∙B∙I∙(R/h)



I. INTRODUCTION Metals are characterized by a high resistance against ionizing irradiation, which makes them attractive for application under high radiation loads as the structural and functional materials, in particular for the advanced nuclear energy systems (Generation IV reactors), fusion reactors [1], accelerator and space techniques, where intensive fluxes of the neutrons, electromagnetic quanta and charged particles are present. The rigid safety requirements demand to develop for such complex and expensive facilities not only the radiationresistant constructional and protection elements, but also a lot of the different diagnostic tools. At the same time, a key task is creation of primary transducers (or sensors) whose parameters define in general a workability of corresponding diagnostic systems, and so they should remain stable during whole term of operation under radiation environment.

where G is a parameter defined by sensor topology; I – supply current; B – magnetic induction's component normal to a film surface; R – Hall coefficient for film's material; h – film thickness. For majority of non-magnetic metals | R | ≤ 2×10-10 m3∙A-1∙s-1, which is by several orders of magnitude smaller than in semiconductors (e.g., for InSb R ~ 10-4 m3∙A-1∙s-1). At registration of field B = 0.1 T by a metal sensor with h = 1 mm at G ≈ 1 and I = 50 mA (1) gives UH ~ 1 nV. It is problematic to measure such small signals under radiation environment due to a presence of noises and interferences as well as due to necessity of the long communication lines use. In the transition to nanofilms with h ~ 100 nm the Hall voltage grows up to UH ~ 10 V, which enhances correspondingly a sensor sensitivity to magnetic field that with taking into account (1) looks like follow:

In particular, a pressing issue is development of the stable magnetic field sensors intended for facilities whose operation is based on the using of magnetic field with complicated configuration (the fusion reactors of a “tokamak” and “stellarator” type, the research and medical charged-particles accelerators, the spacecraft’s positioning systems etc.). An effective solution of this task may be the Hall sensors based on metal nanofilms.



The goal of this work is to study the radiation resistance of Hall sensors based on the polycrystalline metal nanofilms in the reactor's neutron fluxes.



In spite of small UН values the metals have a significant advantage over the semiconductors, which lies in a better temperature stability of electrophysical parameters, especially at elevated temperatures T. For example, in Au, Сu, Al, Nb, Mo value of R is actually unchanged at T = (0 ÷ 500)°С [3]. This point is particular important for applications in the systems with the intensive fluxes of neutrons and -quanta where a significant heating of the magnetic diagnostics' frontend components takes place. E.g., in experimental tokamak ITER the magnetic field sensors will operate at T ≈ 100°С (ex-

This work was supported by the Competitiveness Program of the National Research Nuclear University MEPhI.

978-1-5386-2810-2/17/$31.00 ©2017 IEEE

S = | UH / B / I | = G∙|R| / h

04NESP18-1

NAP-2017, 2017 IEEE 7th International Conference on Nanomaterials: Applications and Properties (NAP) vessel) [4] and at T ≈ 170°С (in-vessel) [5], whereas in future demonstrational fusion reactor DEMO the temperature values are forecast at levels of T ≈ 200°С (ex-vessel) and T ≈ 300°С (in-vessel) [6]. It is an important that the polycrystalline nanofilms of metals are retain a general trend of R(T) dependence typical for the bulk materials, as it shown, for example, in [7] for Au nanofilms. So, sensors based on the metal nanofilms should have a sufficiently high temperature stability in wide range of T. Moreover, it is expected that a polycrystalline nature of material will assist with increase of a metal nanofilms radiation stability, which is explained as follow. As is well known, the primary radiation damages of solid occur via formation of the interstitial atoms and vacancies. At the same time, one of the main factors for providing of a material's radiation resistance is considered a quick recombination of such defects. But, for majority of materials it is typical a rapid movement of interstitial atoms towards surface, which causes the swelling, whereas the vacancies incline to linger in volume and form the clusters, which obstruct to dislocation motion and accordingly lead to embrittlement of material [8]. However, there are a grain boundaries network in the polycrystals, which detain the interstitial atoms intensifying thereby their recombination with the vacancies, which are located at the distance of some nanometers. Clearly that this process efficiency is more higher in the case when the grains have a nanometer sizes [8]. It is this situation is observed, in particular, for Au nanofilms prepared by the vacuum deposition methods [7, 9], for which a mean grain size in the film thickness range h = (20 ÷ 60) nm is approximately equal to h value.

The initial sensitivity values were S0 ≈ 1.2 mV∙A-1∙T-1 (Au, the electron-beam evaporation), S0 ≈ 1.57 mV∙A-1∙T-1 (Au, the thermal deposition) and S0 ≈ 1.74 mV∙A-1∙T-1 (Mo). On the Fig. 1 it is presented the electron-microscope images (РЕММА-102-02 electron microscope) of the samples based on the Au nanofilm manufactured by electron-beam evaporation method (a) and on the Mo nanofilm (b). On the Fig. 1 (c) and (d) it is presented the corresponding X-ray microanalysis spectra, which testify to an absence of foreign impurity atoms in the samples composition. B. Irradiation A study of sensors radiation resistance in the neutron fluxes was carried out by the means of in situ measurement of their sensitivity S in the function of neutron fluence F. This, from the one hand, allows avoid a necessity to work with materials activated owing to irradiation, and, from other hand, provides an unique opportunity to observe in real time the processes of radiation defects accumulation. Earlier this approach was successfully tested by authors at the study of semiconductorbased sensors [10]. Fig. 2 (a) demonstrates a simplified diagram of experiment. The nanofilm sensors were placed in special fixture, Fig. 2 (b),

III. EXPERIMENT DETAILS A. Samples For manufacturing of the Hall sensors’ sensitive elements it was chosen the 50-nm thickness Au and Mo nanofilms grown on the Al2O3 (sapphire) substrates. The chips dimensions were 1 × 1 mm2. These metals have a sufficiently high melting point (≈ 1064°C and 2623°C respectively) and corrosion resistance, which allows using them at long-term thermal loads.

(a)

The Au nanofilms were manufactured by the vacuum electron-beam evaporation method (University of WisconsinMadison) and by the thermal deposition method (MEPhI). The Mo nanofilms were manufactured by the magnetron sputtering method (MEPhI). Before gold deposition, the 10-nm thickness adhesion layer of titan was deposited onto substrate, whereas the Mo films were sputtered directly onto sapphire. With the help of lift-off lithography it was manufactured the 4-terminal Hall sensors in the form of symmetrical crosses with the sensing element dimensions of 200 × 200 m2. For this topology a numerical factor in (1)-(2) is G ≈ 1 [2]. In addition, onto the sensors terminals the (1.5 ÷ 2) m thickness gold contact pads were deposited by the thermal deposition method, which are intended for a bonding of external leads. After manufacturing the sensors were annealed during 3 h at T ≈ 400°С in the vacuum (~ 10-4 torr), this have been allowed to stabilize their electrophysical parameters.

(b)

(с)

(d) Fig. 1. Electron-microscope images (phase-contrast mode) of Hall sensors based on Au nanofilm (the electron-beam evaporation) (a) and Mo nanofilm (the magnetron sputtering) (b), as well as the corresponding X-ray microanalysis spectra for Au nanofilm (с) and Mo nanofilm (d).

04NESP18-2

NAP-2017, 2017 IEEE 7th International Conference on Nanomaterials: Applications and Properties (NAP)

(a)

(b)

Fig. 3. Energy spectrum of neutron flux in IBR-2 (channel #3, distance from the moderator of 30 cm) [12].

(c)

U(B) = UH(B) +U0,

(d)

(e)

Fig. 2. General diagram of the in situ experiment (a); fixture for a placement of sensors and solenoid (b); platform on which sensors are mounted (c); solenoid (d); separate elements of fixture construction (e).

that is manufactured on the base of thermal and radiationresistant ceramics MACOR® (Corning, USA). The testing magnetic field Bt = 15 mT was created by the 10 mm copper solenoid, Fig. 2 (d), that was installed into the fixture. For the sensors' and solenoid's power supply, the acquisition and primary processing of data, it was developed a special control electronics, which saved intermediate results on the local PC for the further their processing by software and transmission onto remote server. During an experiment the fixture with sensors and solenoid was placed in an irradiation channel of nuclear reactor, the control electronics was located outside a channel at 15-m distance, the local PC was located in a control room at 40-m distance. The measuring system elements were connected by the radiation-resistant cables of “twisted pair” type. The sensors’ supply current was I = 40 mA. The nanofilm sensors were irradiated in the research nuclear reactor IBR-2 (Joint Institute for Nuclear Research), in the channel #3. A neutron flux intensity in sensors location (30 cm from the moderator) was 1.5×1017 n∙m-2∙s-1, which corresponds to a radiation environment forthcoming in fusion reactor DEMO [11]. Fig. 3 demonstrates a neutron flux spectrum for sensors location [12]. A total irradiation time was 1852 h (8 session of IBR-2). A total neutron fluence obtained by sensors was Fm ≈ 1×1024 n∙m-2. During irradiation a samples temperature have reached T = (130 ± 5)°С. C. Sensors Signals Processing One of the main lacks of Hall sensors is a finite voltage value on output (residual voltage or offset) at B = 0. As a consequence, measured signal always is the superposition:

(3)

where U(B) is a sensor output voltage, UH – Hall voltage, U0 = U(B = 0) – offset. For metal sensors U0 >> UH. Correspondingly, it is arises the problem with registration of the small UH signal against the background of the high U0 one, which is complicated by a presence of significant noises and interferences in the measuring system (the own noises of sensor and control electronics, the interferences on long cables etc.) In this connection, for the in situ measurements it was used the spinning-current technique [13] that allows appreciably reduce U0 in (3) up to some level U0*