Modification of structural and conductive properties of Zn nanotubes by irradiation with electrons with an energy of 5 MeV

Kadyrzhanov, D.; Zdorovets, Maxim V.; Kozlovskiy, Artem L.; Kenzhina, I.; Петров, А. В.

doi:10.1088/2053-1591/aa9e64

Cited by 11 publications

(3 citation statements)

References 16 publications

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“…Moreover, high energies of electrons or gamma rays (more than 1-5 MeV) lead to the formation of electronic cascades in the structure, which can lead to a significant change in the electron density of nanostructures, which leads to ordering of the structure and a change in the orientation of texture planes. At the same time, when irradiated with electronic and gamma radiation, the probability of an increase in the geometric dimensions of nanostructures is extremely small, which indicates the great promise of these types of radiation for directional modification and reduction of the disequilibrium of structural parameters in nanomaterials [16][17][18][19][20]. The absence of oxidation processes as a result of phase transformations upon irradiation with electrons or gamma rays opens up wide possibilities for using these types of radiation for the directed modification of iron-nickel or iron-containing nanostructures, for which oxidation processes are accompanied by phase transformations and changes in properties [21][22][23][24][25].…”

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confidence: 99%

Investigation of the Structural Changes and Catalytic Properties of FeNi Nanostructures as a Result of Exposure to Gamma Radiation

et al. 2020

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The paper presents the results of changes in the structural characteristics, and the degree of texturing of FeNi nanostructures close in composition to permalloy compounds as a result of directed modification by gamma radiation with an energy of 1.35 MeV and doses from 100 to 500 kGy. The choices of energy and radiation doses were due to the need to modify the structural properties, which consisted of annealing the point defects that occurred during the synthesis along the entire length of the nanotubes. The initial FeNi nanostructures were polycrystalline nanotubes of anisotropic crystallite orientation, obtained by electrochemical deposition. The study found that exposure to gamma rays led to fewer defects in the structure, and reorientation of crystallites, and at doses above 300 kGy, the presence of one selected texture direction (111) in the structure. During tests of the corrosion resistance of synthesized and modified nanostructures in a PBS solution at various temperatures, it was found that exposure to gamma rays led to a significant decrease in the rate of degradation of nanotubes and an increase in the potential life of up to 20 days. It was established that at the first stage of testing, the degradation of nanostructures is accompanied by the formation of oxide inclusions, which subsequently lead to the formation of pitting corrosion and subsequent partial or complete destruction of the nanostructures. It is shown that gamma radiation is promising not only for targeted modification of nanostructures and increasing resistance to degradation, but also for increasing the rate of catalytic reactions of the PNA-PPD type.

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Section: Introductionmentioning

confidence: 99%

Investigation of the Structural Changes and Catalytic Properties of FeNi Nanostructures as a Result of Exposure to Gamma Radiation

et al. 2020

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“…The ECD of ZnO nanowires in polymer etched ion‐track templates has been reported by several authors employing various electrolytes . Though, there are only a few studies devoted to the precipitation of ZnO nanocrystals in SiO 2 /Si track templates.…”

Section: Introductionmentioning

confidence: 99%

“…[16,17] The ECD of ZnO nanowires in polymer etched ion-track templates has been reported by several authors employing various electrolytes. [18][19][20][21] Though, there are only a few studies devoted to the precipitation of ZnO nanocrystals in SiO 2 /Si track templates. In our previous article the Zn-based nanoparticles have been precipitated into nanoporous a-SiO 2 /Si-p templates using chemical and electrochemical deposition.…”

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Synthesis of ZnO Nanocrystals in SiO₂/Si Track Template: Effect of Electrodeposition Parameters on Structure

Dauletbekova

Власукова

Baimukhanov

et al. 2019

Physica Status Solidi (b)

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This paper presents a study of nanoclusters obtained by electrochemical deposition (ECD) of zinc in the a‐SiO2/Si‐n track template. The nanoporous SiO2 layer on Si substrate (track template) has been created by irradiation with swift Xe ions and further etching in HF solution. The morphology of SiO2/Si‐n track templates and precipitated Zn‐based clusters are examined using a scanning electron microscope JSM 7500F. The crystallographic structure of the Zn‐based precipitates was investigated by means of X‐ray diffraction (XRD). X‐ray analysis is carried out on a D8 ADVANCE ECO X‐ray diffractometer. The Bruker AXSDIFFRAC.EVAv.4.2 software and the international ICDD PDF‐2 database are used to identify the phases and study the crystal structure. From XRD data, it has been found the formation of three crystalline phases of zinc oxide nanocrystals electro‐deposited into SiO2/Si track template: wurtzite, sphalerite, and rock salt structures. Wurtzite is obtained on an amorphous surface of silicon dioxide. Possible mechanisms of ZnO formation instead of metal Zn nanocrystals are discussed.

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Ion track template technique for fabrication of ZnSe2O5 nanocrystals

Аkilbekov

Akylbekovа

Usseinov

et al. 2020

Nuclear Instruments and Methods in Physics Research Section B:

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ZnSe2O5 nanocrystals with an orthorhombic structure were synthesized by electrochemical deposition into a-SiO2/n-Si ion track template formed by 200 MeV Xe ion irradiation with the fluence of 10 7 ions/cm 2. The lattice parameters determined by the X-ray diffraction and calculated by the CRYSTAL computer program package are very close to each other. It was shown that ZnSe2O5 has a direct band gap of 2.8 eV at the Γ-point. In addition, the calculated charge distribution and chemical bonds show that the crystal has an ion-covalent nature. The photoluminescence excited by photons at 300 nm has a low intensity arising mainly due to zinc and oxygen vacancies.

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Modification of structural and conductive properties of Zn nanotubes by irradiation with electrons with an energy of 5 MeV

Cited by 11 publications

References 16 publications

Investigation of the Structural Changes and Catalytic Properties of FeNi Nanostructures as a Result of Exposure to Gamma Radiation

Investigation of the Structural Changes and Catalytic Properties of FeNi Nanostructures as a Result of Exposure to Gamma Radiation

Synthesis of ZnO Nanocrystals in SiO₂/Si Track Template: Effect of Electrodeposition Parameters on Structure

Ion track template technique for fabrication of ZnSe2O5 nanocrystals

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Modification of structural and conductive properties of Zn nanotubes by irradiation with electrons with an energy of 5 MeV

Cited by 11 publications

References 16 publications

Investigation of the Structural Changes and Catalytic Properties of FeNi Nanostructures as a Result of Exposure to Gamma Radiation

Investigation of the Structural Changes and Catalytic Properties of FeNi Nanostructures as a Result of Exposure to Gamma Radiation

Synthesis of ZnO Nanocrystals in SiO2/Si Track Template: Effect of Electrodeposition Parameters on Structure

Ion track template technique for fabrication of ZnSe2O5 nanocrystals

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Synthesis of ZnO Nanocrystals in SiO₂/Si Track Template: Effect of Electrodeposition Parameters on Structure