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Alexander Petrov

Alexander Petrov
Scientific-Practical Materials Research Centre of the National Academy of Sciences of Belarus · Cryogenic Research Division

PhD

About

99
Publications
6,411
Reads
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1,425
Citations
Citations since 2017
30 Research Items
559 Citations
2017201820192020202120222023020406080100120
2017201820192020202120222023020406080100120
2017201820192020202120222023020406080100120
2017201820192020202120222023020406080100120
Introduction
My research experience is in the field of nanotechnologies and condensed matter physics (possibility of creation of nanoelectronic and spintronic devices on the base of polymers and silicon-based materials with swift heavy ion (SHI) tracks). Presently I am mostly engaged in projects concerning preparation and investigations of nanostructures with magnetic materials for for spintronic applications and biomedicine, based on the complex metal oxides with the double perovskite structure (Sr2FeMoO6)
Additional affiliations
March 2009 - September 2009
Humboldt-Universität zu Berlin
Position
  • visiting researcher
October 2007 - December 2007
Technische Universität Dresden
Position
  • Researcher
Description
  • Creation and investigations of sensoric devices on the base of composite polymer-semiconductor system with micro- and nanopores
February 2006 - June 2006
University of California, Irvine
Position
  • PostDoc Position
Description
  • Creation and investigations of characteristics of nanofluidic diode-like structures based on plymer films with a single nanopore (etched swift heavy ion track)
Education
March 2001 - October 2004
FernUniversität in Hagen
Field of study
  • Creation and investigations of micro- and nanolectronic devices on the base of the swift heavy ion track technology
September 1984 - June 1991
Belarusian State University
Field of study
  • Solid state physics

Publications

Publications (99)
Article
Full-text available
In this work, solid solutions of La 0.7 Sr 0.3 Mn 0.95 Fe 0.05 O 3-δ with different oxygen content were obtained by the solid-phase reactions technique. Based on the investigation of the dynamics of changes in the oxygen index (3 – δ) during heating of the samples, the formation of a stressed state in their grains as a result of annealing was estab...
Article
We report our systematic investigation of structural, magnetic, and magnetocaloric properties of double perovskite compounds Ho2FeMnO6, Ho2CoMnO6, and Ho2NiMnO6, which crystallize into monoclinic crystal structure with P21/n space group. The magnetic phase transition temperatures are determined to be 7.5 K for Ho2FeMnO6, 69 K for Ho2CoMnO6, and 71....
Article
The present paper is devoted to the study of the structural degradation mechanisms of ferroelectric having Pb1−хBaхZr0,53Ti0,47O3−δ composition. On the base of investigations of the influence of temperature-time synthesis modes on the structural perfection degree of the Pb0,85Ba0,25Zr0,53Ti0,47O3−8 compound, it has been determined, that a shift of...
Article
Sr2FeMoO6–x polycrystalline samples with different oxygen content (6−x) and various degrees of superstructural ordering of Fe/Mo cations (P) were obtained by the solid-phase method from the SrFeO2.52 and SrMoO4 precursors. From the investigation on the influence of oxygen non-stoichiometry and the P parameter on the magnetic properties of Sr2FeMoO6...
Article
The paper presents the results of a study of the influence of heavy ions Xe²²⁺ on the morphology, phase composition, structural and conductive characteristics of CoO/Co0.65Zn0.35 nanowires obtained by the method of electrochemical synthesis. As a result of the research, it was established that an increase in the irradiation fluence leads to a chang...
Article
The dynamics of phase transformations in CoZnO/CoZn nanostructures of the Zn – Hexagonal/ZnCo2O4 – spinel → Zn – Hexagonal/Co2.34Zn10.63 → Co– Hexagonal/Co2.34Zn10.63 type depending on the difference of the applied potentials is presented. As a production method, the method of electrochemical synthesis was used, in which polymer track membranes wit...
Article
Characteristic features of the PbZr0.54Ti0.46O3 formation in etched swift heavy ion tracks and investigations of dielectric properties of the obtained structures are reported in this work. PbZr0.54Ti0.46O3 compound is formed as a result of thermal treatment of film structures with identical composition being ion-beam sputtered on Si/SiO2 substrates...
Article
Full-text available
The kinetics of phase contents modification in the process of SrBaFeMoO 6–δ crystallization from a stoichiometric mixture of SrCO 3 + BaCO 3 + 0,5Fe 2 O 3 + MoO 3 simple oxides using the solid phase method has been investigated. In the temperature region of 300–1200°С, a number of endotermic effects have been detected. Herewith, the first one (with...
Article
About 20 nm large LiNbO3 nanocrystals are produced by high-energy ball milling, and then suspended in water by surrounding them with amyl acetate ligands. The formed colloids are allowed to penetrate into etched swift heavy ion tracks in an oxide layer on silicon. After appropriate contacting, both a source-drain and a gate voltage are connected to...
Chapter
This work aims to study the possibility of using SiO2/n-Si porous template to the formation of copper nanostructures with different morphology for the surface-enhanced Raman spectroscopy (SERS) applications. Porous SiO2/n-Si templates were obtained using swift heavy ion-track technology including irradiation and chemical etching. The influence of t...
Article
Full-text available
The sequence of phase transformations in the process of crystallization of the Sr 2 CrMoO 6 by the solid-phase technique from a stoichiometric mixture of simple oxides SrCO 3 + 0.5Cr 2 O 3 + MoO, has been investigated. It was determined that the synthesis of the strontium chrome-molybdate proceeds through a series of sequential-parallel stages. By...
Article
The effect of directed modification of nanostructures was studied using C ²⁺ and O ²⁺ ion beams. The use of ion beams with fluences of 1-5 • 10 ¹¹ ion/cm ² leads to an improvement in structural properties, due to the reduction of distortions and stresses in the structure. It has been established that an increase in the irradiation fluence above 5 •...
Article
Full-text available
Single‐phase strontium ferromolybdate (Sr2FeMoO6–δ) samples with different degrees of the superstructural ordering of the Fe/Mo cations (P) are obtained from partially reduced SrFeO3–х, SrMoO4 precursors by the solid‐state technology. The study of the temperature dependences of the magnetization measured in the field‐cooling and zero‐field‐cooling...
Article
The rapid growth of the market of electronic devices designed on the base of micro- and nanoelectronic components requires novel unconventional approaches for nanostructures formation. In this regard, ion-track technology, which allows forming nanostructures with a predetermined geometry is very promising. The paper demonstrates a simple and scalab...
Article
Full-text available
Iron oxide nanorods are considered to be very promising platforms for biomedical applications, such as magnetic hyperthermia, magnetic resonance imaging or immunoassays based on magneto-optical effects. However, their efficient colloidal stabilization is challenging, and colloidal aggregation could lead to the total loss of their performance. This...
Article
It has been found that irradiation with Kr⁺¹⁷ ion beam makes it possible to modify the crystal structure of Zn nanotubes and to perform electron annealing of defects, which leads to a change in the main parameters of the crystal structure.
Article
Full-text available
The paper presents the dependence of the degradation degree in various aggressive media and time in a medium. The greatest deterioration in crystallographic characteristics of nanostructures in corrosive media is observed on the day 10th , which is due to partial destruction of the crystal structure as a result of oxidation processes. Also, an incr...
Article
Full-text available
The single-phase strontium ferromolybdate powder with the double perovskite structure has been synthesized by the citrate-gel method with superstructural ordering of iron and molybdenum cations of 88%. The formation of the SrMoO4 phase on the intergrain boundaries has been determined by means of the XRD studies, the Electrokinetic Sonic Analysis te...
Article
Full-text available
Magnetic metal-oxide compounds with high values of magnetoresistance (MR) have attracted huge interest for spintronic applications, among which Sr2FeMoO6-δ (SFMO) has been relatively less known compared to the cobaltites and manganites, despite 100% electrons spin-polarization degree and a high Curie temperature. Here, stable fabrication and system...
Article
Full-text available
Nickel nanoparticles coated with few layers of carbon have been embedded into the polydimethylsiloxane (PDMS) matrix in concentrations up to 11 vol %. Dielectric and magnetic properties of composite materials have been studied in wide frequency (20 Hz–1 MHz) and temperature (130–430 K) ranges. It was demonstrated that the temperature behavior of di...
Article
Full-text available
The aim of the study is establishing the possibility of using Zn nanotube arrays as a basis for design compact and lightweight elements of flexible electronics, including operating under influence of ionizing irradiation. The paper presents the results of the synthesis of Zn nanotubes obtained by electrochemical deposition in the pores of polymer m...
Article
Full-text available
The behavior of the crystalline and magnetic structure of Ba 2FeMoO 6 compound in a wide pressure range from 0 to 4.7 GPa was studied. The crystal structure of ceramic sample was described in the framework of SG I4/mmm (No 139) and contains less 10% of anti-site defects. The change of tetragonal structure (I4/mmm) was not observed in all measured p...
Presentation
Full-text available
Magnetic iron oxide nanoparticles have been recognized for use in various promising biomedical applications, such as detection of biological molecules, contrast agents in magnetic resonance imaging (MRI), vectors in drug delivery and mediators to convert electromagnetic energy to heat (hyperthermia). We reproduce a simple two-step reaction strategy...
Article
Full-text available
The paper presents the results of synthesis and directional modification of structural and conductive properties of Zn nanotubes obtained by electrochemical deposition in the pores of template polymer matrices. As a result of conducted studies, it was established that irradiation with an electron flow allows modifying the crystal structure of nanot...
Article
Single-phase agglomerated Sr2FeMoO6-δ powders with the iron and molybdenum cations superstructural ordering of 88% were synthesized by sol-gel technique from the Sr(NO3)2 and Fe(NO3)3·9H2O solutions with pH = 4. The ultrasound dispersion enabled us to obtain 75 nm grains. Powders were pressed with 4 GPa to receive the ceramics. The additional annea...
Article
Full-text available
Ferrimagnetic-ferroelectric composite materials on the base of Pb0.85Zr0.53Ti0.47O3– Sr2FeMoO6–δ (PZT-SFMO) compounds have been prepared by a complex ceramic technology and a modified sol-gel synthesis. The dielectric properties of the PZT-SFMO composites with the PZT concentrations of 55wt% and less, as well as of pure SFMO, are caused by the Maxw...
Article
Full-text available
Investigations of the formation conditions of Sr2FeMoO6−δ compound films, depending on the substrate temperature and sputtering rate with their subsequent thermal treatment, have made it possible to obtain the single-phase homogeneous films. The analysis of x-ray diffractometry and magnetic force microscopy data has made it possible to reveal the s...
Article
Nanoporous silicon oxide templates formed by swift heavy ion tracks technology have been investigated. The influence of the heavy ion characteristics, such as type of ion, energy, stopping power and irradiation fluence on the pore properties of the silicon oxide templates, has been studied. Furthermore, the process of pore formation by chemical etc...
Chapter
Nickel-carbon nanocomposites have been synthesized by the solid-phase pyrolysis of nickel-phthalocyanine at temperatures in the range 600–1100 °C and synthesis duration time up to 300 min. Nickel nanoparticles of various size have been obtained, which are embedded in carbon nanotubes (CNT), nanofibers and encapsulated in the graphite-like shell. A...
Article
Full-text available
We report our investigation on structural and magnetic properties of double perovskite Sr2FeMoO6 (SFMO) films fabricated at different annealing temperatures. Structural properties have been investigated by means of X-ray absorption near-edge spectra and extended X-ray fine structure, where a change of oxidation state has been observed depending on...
Article
Full-text available
In this paper, using the method of electrochemical template synthesis, ordered arrays of metallic nanostructures on the basis of cobalt with various dimensions (180-380 nm) were obtained. The diameter of Co-nanotubes was controlled by original polymer matrix, which provided to prepare arrays consisting of individually standing cobalt nanotubes. The...
Article
Among the group of materials with the double perovskite structure, a half-metallic Sr2FeMoO6 (SFMO) system has attracted increasing attention. Recently, numerous studies have been carried out to understand the structural, magnetic, and magnetocaloric properties of SFMO [1-3] since the SFMO materials have TC about the room temperature, high low-fiel...
Article
Full-text available
We have investigated temperature-dependent magnetic hysteresis loop behavior of Ba 2- x La x FeMoO 6 with double perovskite structure by means of a vibrating sample magnetometer (VSM). As partial substitution of Ba ²⁺ by La ³⁺ is varied from x = 0.1 to 0.3, T C is found to increase from 324 to 345 K. Interestingly, however, hysteresis loop area, re...
Article
Full-text available
A structure consisting of a nanoporous dielectric film (SiO2) containing alternated layers of metal (Cu/Ni) in the pores on a n-type semiconductor substrate has been formed using the swift heavy ion track technology. Investigations of electrical and galvanomagnetic characteristics of this structure have made it possible to determine conduction mech...
Article
Full-text available
Abstract—Si/SiO2/Ni nanostructures are fabricated by the irradiation of an oxidized Si surface with swift heavy ions, nanopore etching in the SiO2 layer, and the electrochemical deposition of nickel in the nanopores with their partial (~50%) or complete filling. Studies of the morphology of the metal in the nanopores shows that the nickel�cluster s...
Conference Paper
Comparable studies of phase composition, dispersity and magnetic properties of Sr2FeMoO6±δ powders obtained by the solid-phase synthesis and the modified sol-gel method have been carried out. The powder obtained by the solid-phase synthesis has high phase purity with the concentration of antistructural defects of 17%. The sol-gel synthesis allows o...
Article
Ceramic piezomaterials based on Pb0.75Ba0.15Zr0.53Ti0.47O3 (PBZT) system are characterized by high values of the ferroelectric Curie temperature and polarization. They have widespread applications in electromechanical and electroacoustic transducers, bandwidth filters, transformers, frequency stabilized resonators, etc. Preparation of PBZT composit...
Article
Full-text available
In the last years, concepts have been developed to use etched ion tracks in insulators, such as polymer foils or silicon oxide layers as hosts for nano- and microelectronic structures. Depending on their etching procedure and the thickness of the insulating layer in which they are embedded, such tracks have typical diameters between some 10 nm and...
Article
Catalyst-free self-assembled InP nanoneedles are grown on (0 0 1) InP-substrates using gas-source molecular beam epitaxy. The nanoneedles are investigated using SEM and TEM imaging, as well as micro-Raman measurements. Two nanoneedle orientations were observed: vertical (0 0 1)-oriented with the zincblende crystal structure and tilted needles with...
Conference Paper
Full-text available
Characteristic features of formation of PbZr0.54Ti 0.46O3 compound in etched swift heavy ion tracks obtained by irradiation of Si/SiO2 structure by 197Au26+ ions and investigations of dielectric properties of the obtained structures are considered. PbZr0.54Ti0.46O3 compound is obtained as a result of optimization of thermal treatment of film struct...
Article
Full-text available
It is determined that the state of initial reagents considerably influence the inhomogeneity of Sr2FeMoO6-δ samples microstructure which has caused the appearance of super-paramagnetism and spin glass state in Sr2FeMoO6-δ.
Article
Full-text available
Carbon nanotubes (CNTs) and SiC whiskers are synthesized by the pyrolysis of acetonitrile vapor over Ni nanoparticles deposited in the pores obtained by etching heavy ion tracks in dielectric SiO2 layers on single crystal silicon substrates. The structures obtained are studied by scanning electron microscopy and Raman spectroscopy, and their field...
Article
Full-text available
During the last years, a growing interest in the creation of micro-and nanoelectronic devices by use of the swift heavy ion track technology in a combination with carbon nanotubes (CNTs) is observed in several research centers worldwide. The CNTs were grown in etched ion tracks in SiO2 layers on Si. For this purpose, Ni-catalyst nanoclusters were e...
Conference Paper
Nanostructures based on C6O (fullerite) deposited into swift heavy ion (SHI) tracks in a polyimide layer on a silicon substrate have revealed the pronounced sensitivity to humidity and temperature, which can be associated with the mobility ofW and OH' ions within the fullerite lattice and electrochemical corrosion in humid environment in the presen...
Article
The time evolution of transmitting 1.6 keV H+ and 3 keV Ne7+ ions through nanocapillaries (100 nm diameter and 10 μm length) in PET insulators was studied. By measuring the angular distribution of the transmitted projectiles it is shown that the majority of ions are transported in their initial charge state along the capillary axis even when the ca...
Article
Full-text available
Structures based on the SiO2/n-Si and SiO2/p-Si systems, with nanopores in silicon dioxide layers filled with Cu and Ni nanoparticles, have been prepared and investigated using the fast heavy ion technology, which includes irradiation with 197Au26+ ions, chemical etching of ion tracks, and subpotential electrochemical deposition. The selectivity of...
Article
Structures on the base of n-Si/SiO2 with nanopores in silicon dioxide layers filled with Cu and Ni particles are prepared by means of the swift heavy ion track technology, and investigated. A selectivity of nanopores filling with metals is shown. Current-voltage characteristics of the studied structures are carried out and a feasibility of the TEMP...
Article
Since a decade the concept emerged to use conducting ion tracks in nano-and micro-electronics, due to their small dimensions. Whereas in a few cases the ion tracks themselves are already conducting, in the majority of all cases the ion tracks have first to be etched to form nanopores, into which (semi)conducting matter is inserted thereafter. The M...
Article
Electrical properties of silicon diodes with p+n junctions irradiated with 197Au+26 swift heavy ions (energy E = 350 MeV, fluences of 10^7 cm^−2 and 10^8 cm^−2) and silicon diodes irradiated with electrons (energy E = 3.5 MeV, fluences of 10^15 cm^−2, 5×10^15 cm^−2 and 10^16 cm^−2) have been investigated. Frequency dependences of the impedance, cur...
Article
Nickel and copper were potentiostatically deposited onto monocrystalline n-Si (100) wafers and in nanoporous SiO2/Si template from 0.5 M NiSO4 + 0.5 M H3BO3 and 0.005 M CuSO4 + 0.5 M H3BO3 solutions. Nanoporous SiO2/Si template was formed by etching in dilute HF solution of ion tracks. The latter were produced by high-energy (380 MeV) Au+ ions bomb...
Conference Paper
Electrochemical deposition of Te nanoparticles from acidic TeO(2) solution on n-Si(100) wafers and in nanoporous SiO(2) layer on n-Si (SiO(2)/n-Si) has been studied by cyclic voltammetry, chronoamperometry, ex situ scanning electron and atomic force microscopy and x-ray diffraction. The deposition occurs with the overvoltage eta(c) = 0.62 V and cha...
Article
Full-text available
With interest rising recently in nanostructures of all kinds, attention was also given to etched ion tracks in insulators. The emerging nanopores with a very high aspect ratio enable one to create new functionalities especially in thin polymeric foils and oxide on silicon structures, when combined with electronic, optical, catalytic or sensing mate...
Article
We examine time signals of ion current through single conically shaped nanopores in the presence of sub-millimolar concentrations of calcium ions. We show that calcium induces voltage-dependent ion current fluctuations in time in addition to the previously reported negative incremental resistance (Nano Lett. 2006, 6, 473-477). These current fluctua...
Article
We tried to produce antibacterial and antifouling advanced packing materials and medical plasters using the nowadays-available synthetic polymer foils. For this sake, we irradiated 10-μm-thick polyethylene terephthalate (PET) and polyimide (PI) foils with energetic ions at our heavy ion accelerators in Dubna or Berlin up to fluences around 107 cm−2...
Article
Electrochemical deposition of PbSe and CdTe nanoparticles onto p-Si(100) wafers and into nanopores in SiO2 layer grown thermally on p-Si(100) substrates (SiO2/Si(100) structure) under illumination was studied. To produce nanopores we used SiO2 layer with tracks developed by irradiation of 350 MeV Au ions. Pores structure was formed by chemical etch...
Article
Full-text available
Ion irradiation of polymers offers a number of interesting possibilities for applications. In the case of latent tracks, radiochemical changes, phase transitions, alterations of the intrinsic free volume, or radiation induced defects can be exploited – the latter ones to trap mobile impurities. These approaches are useful to form, e.g. new types of...
Article
The deposition of ceramic colloidal particles into the pores of polymer ion track membranes was studied. By means of a low temperature sol gel process, aqueous dispersions of ceramic nanoparticles can adhere to virtually any surface of a porous polymer foil substrate including the interior walls of the pores without adversely affecting the flexibil...
Article
The transmission of 3 keV ions through capillaries of 100 and 200 nm diameters and 10 μm length produced by etching ion tracks in a PET polymer foil were measured. The foils were tilted relative to the incident beam direction by angles up to 25° for which the incident ions are forced to approach the capillary surface. Surprisingly, the majority of...
Article
Au/C60/p-Si sandwich structures can be easily obtained by evaporation of a thin fullerite (C60) film on a silicon substrate and a thin Au film on top of the C60 film. In this case a C60/p-Si p–n heterojunction appears. Both the dark and photoconductivities of the planar pristine and irradiated Au/C60/p-Si structures were measured as a function of t...
Conference Paper
During the last years, a growing interest in the creation of micro- and nanoelectronic devices by use of the Swift Heavy Ion (SHI) track technology has been observed. First prototypes of transformers and capacitors for nanotechnology applications were created in this way on the base of polyimide (PI) foil with etched ion tracks. Complex testing of...
Conference Paper
The crystalline state of fullerene C<sub>60</sub>, called fullerite, is a semiconductor with a wide band gap. The type of bond between C<sub>60</sub> molecules in fullerite crystals means that the resistance of fullerite changes dramatically as result of applied pressure. In principal, fullerene can be used as a functional material for electronic d...
Article
Full-text available
It is known that the conductivity of fullerite depends on the applied pressure. In this paper we compare the variation of conductivity of three different fullerite structure with pressure. We examined C_{60} powder, filled into thin glass capillaries and also studied fullerite nanotubules produced within etched swift heavy ion tracks in polymer foi...
Article
Full-text available
Following the preparation of novel electronic MOS like structures TEMPOS tunable electronic material with pores on semiconductors with Ag nanocluster filled etched ion tracks, in this work Au nanocluster filled TEMPOS Au NC TEMPOS structures are presented. In spite of some similarities, the characteristics of both Ag and Au TEMPOS structures differ...
Article
The paper presents the study of CdS0.2Se0.8 n-type films 0.50-0.65 μm thick manufactured by the RF sputtering technique and their electro-optical properties. The effects of the substrate texturing on the structure and properties of the films are discussed. Recrystallization of the films sputtered onto glass substrates coated with a continuous or is...
Article
Abstract The impact of swift heavy ions onto silicon oxide and silicon oxynitride on silicon creates etchable tracks in these insulators. After their etching and filling up with highly resistive matter, these nanometric pores can be used as charge extraction or injection paths towards the conducting channel in the underlying silicon. In this way, a...
Article
We measured the transmission of 3 keV Ne7+ ions through nanocapillaries of 100 nm diameter and 10 μm length in a PET polymer foil. The capillaries were produced before the transmission experiments by etching tracks of fast xenon ions. The foils were tilted up to 15° for which the incident ions are forced to approach the capillary surface. After a c...
Conference Paper
Recent years have brought a renaissance of interest in swift heavy ion track technology, for the sake of prospective novel applications, i.e. creation of nanoscale electronic devices. This paper summarizes some of the newly emerging possibilities, and the strategies that have been initiated. Only a few applications that are based on latent tracks h...