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Khranovskyy, Volodymyr
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Publications (10 of 51) Show all publications
Shavanova, K., Bakakina, Y., Burkova, I., Shtepliuk, I., Viter, R., Ubelis, A., . . . Khranovskyy, V. (2016). Application of 2D Non-Graphene Materials and 2D Oxide Nanostructures for Biosensing Technology. Sensors, 16(2)
Open this publication in new window or tab >>Application of 2D Non-Graphene Materials and 2D Oxide Nanostructures for Biosensing Technology
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2016 (English)In: Sensors, ISSN 1424-8220, E-ISSN 1424-8220, Vol. 16, no 2Article, review/survey (Refereed) Published
Abstract [en]

The discovery of graphene and its unique properties has inspired researchers to try to invent other two-dimensional (2D) materials. After considerable research effort, a distinct "beyond graphene" domain has been established, comprising the library of non-graphene 2D materials. It is significant that some 2D non-graphene materials possess solid advantages over their predecessor, such as having a direct band gap, and therefore are highly promising for a number of applications. These applications are not limited to nano- and opto-electronics, but have a strong potential in biosensing technologies, as one example. However, since most of the 2D non-graphene materials have been newly discovered, most of the research efforts are concentrated on material synthesis and the investigation of the properties of the material. Applications of 2D non-graphene materials are still at the embryonic stage, and the integration of 2D non-graphene materials into devices is scarcely reported. However, in recent years, numerous reports have blossomed about 2D material-based biosensors, evidencing the growing potential of 2D non-graphene materials for biosensing applications. This review highlights the recent progress in research on the potential of using 2D non-graphene materials and similar oxide nanostructures for different types of biosensors (optical and electrochemical). A wide range of biological targets, such as glucose, dopamine, cortisol, DNA, IgG, bisphenol, ascorbic acid, cytochrome and estradiol, has been reported to be successfully detected by biosensors with transducers made of 2D non-graphene materials.

Place, publisher, year, edition, pages
MDPI AG, 2016
Keywords
transition metal dichalcogenides; transducers; beyond graphene; biosensors; two-dimensional materials; two-dimensional oxides; transition metal oxides
National Category
Chemical Sciences
Identifiers
urn:nbn:se:liu:diva-126850 (URN)10.3390/s16020223 (DOI)000371787800102 ()26861346 (PubMedID)
Note

Funding Agencies|EC FP-7 International Research Staff Exchange Scheme (IRSES) Grant [318520]; Linkoping Linnaeus Initiative for Novel Functional Materials (LiLi-NFM); European Union [604391]; Swedish Research Council (VR) Marie Sklodowska Curie International Career Grant [2015-00679]

Available from: 2016-04-05 Created: 2016-04-05 Last updated: 2017-11-30
Shtepliuk, I., Khranovskyy, V. & Yakimova, R. (2016). Effect of c-axis inclination angle on the properties of ZnO/Zn1-xCdxO/ZnO quantum wells. Thin Solid Films, 603, 139-148
Open this publication in new window or tab >>Effect of c-axis inclination angle on the properties of ZnO/Zn1-xCdxO/ZnO quantum wells
2016 (English)In: Thin Solid Films, ISSN 0040-6090, E-ISSN 1879-2731, Vol. 603, p. 139-148Article in journal (Refereed) Published
Abstract [en]

The development of optoelectronic devices based on highly-promising Zn1 - xCdxO semiconductor system demands deep understanding of the properties of the Zn1 - xCdxO-based quantum wells (QWs). In this regard, we carried out a numerical study of the polarization-related effects in polar, semi-polar and non-polar ZnO/ Zn1 - xCd xO/ZnO QWs with different parameters of the quantum well structure. The effects of well width, barrier thickness, cadmium content in the active layer and c-axis inclination angle on the distribution of the electron and hole wave function and transition energy were investigated using the 6 x 6 k center dot p Hamiltonian and one-dimensional self-consistent solutions of nonlinear Schrodinger-Poisson equations with consideration of spatially varying dielectric constant and effective mass. The strong sensitivity of the internal electric field, transition energy and overlap integral to cadmium content and well thickness in the angle range from 0 to 40 degrees was revealed. An unexpected change of the internal electric fields sign was observed at the angles ranging from 70 to 90 degrees. We also found a difference in the electronic properties between (0001)-, (11 (2) over bar2)-and (10 (1) over bar0)-oriented QWs.

Place, publisher, year, edition, pages
ELSEVIER SCIENCE SA, 2016
Keywords
Inclination angle; Quantum well; Polarization; ZnCdO alloy; Transition energy
National Category
Chemical Sciences
Identifiers
urn:nbn:se:liu:diva-127431 (URN)10.1016/j.tsf.2016.02.007 (DOI)000372794900022 ()
Note

Funding Agencies|Swedish Institute scholarship

Available from: 2016-05-01 Created: 2016-04-26 Last updated: 2017-11-30
Elhag, S., Khun, K., Khranovskyy, V., Liu, X., Willander, M. & Nour, O. (2016). Efficient Donor Impurities in ZnO Nanorods by Polyethylene Glycol for Enhanced Optical and Glutamate Sensing Properties. Sensors, 16(2)
Open this publication in new window or tab >>Efficient Donor Impurities in ZnO Nanorods by Polyethylene Glycol for Enhanced Optical and Glutamate Sensing Properties
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2016 (English)In: Sensors, ISSN 1424-8220, E-ISSN 1424-8220, Vol. 16, no 2Article in journal (Refereed) Published
Abstract [en]

In this paper, we show that the possibility of using polyethylene glycol (EG) as a hydrogen source and it is used to assist the hydrothermal synthesis of ZnO nanorods (ZNRs). EG doping in ZNRs has been found to significantly improve their optical and chemical sensing characteristics toward glutamate. The EG was found to have no role on the structural properties of the ZNRs. However, the x-ray photoelectron spectroscopy (XPS) suggests that the EG could induce donor impurities effect in ZnO. Photoluminescence (PL) and UV-Vis. spectra demonstrated this doping effect. Mott-Schottky analysis at the ZNRs/electrolyte interface was used to investigate the charge density for the doped ZNRs and showed comparable dependence on the used amount of EG. Moreover, the doped ZNRs were used in potentiometric measurements for glutamate for a range from 10(-6) M to 10(-3) M and the potential response of the sensor electrode was linear with a slope of 91.15 mV/decade. The wide range and high sensitivity of the modified ZNRs based glutamate biosensor is attributed to the doping effect on the ZNRs that is dictated by the EG along with the high surface area-to-volume ratio. The findings in the present study suggest new avenues to control the growth of n-ZnO nanostructures and enhance the performance of their sensing devices.

Place, publisher, year, edition, pages
MDPI AG, 2016
Keywords
potentiometric sensor; ZnO nanorods; glutamate; doping
National Category
Electrical Engineering, Electronic Engineering, Information Engineering Chemical Sciences Physical Sciences
Identifiers
urn:nbn:se:liu:diva-126849 (URN)10.3390/s16020222 (DOI)000371787800096 ()26861342 (PubMedID)
Note

Funding Agencies|University of Kordofan, El-Obeid, Kordofan Sudan [700]

Available from: 2016-04-05 Created: 2016-04-05 Last updated: 2017-11-30
Alnoor, H., Pozina, G., Khranovskyy, V., Liu, X., Iandolo, D., Willander, M. & Nur, O. (2016). Influence of ZnO seed layer precursor molar ratio on the density of interface defects in low temperature aqueous chemically synthesized ZnO nanorods/GaN light-emitting diodes. Journal of Applied Physics, 119(16), 165702
Open this publication in new window or tab >>Influence of ZnO seed layer precursor molar ratio on the density of interface defects in low temperature aqueous chemically synthesized ZnO nanorods/GaN light-emitting diodes
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2016 (English)In: Journal of Applied Physics, ISSN 0021-8979, E-ISSN 1089-7550, Vol. 119, no 16, p. 165702-Article in journal (Refereed) Published
Abstract [en]

Low temperature aqueous chemical synthesis (LT-ACS) of zinc oxide (ZnO) nanorods (NRs) has been attracting considerable research interest due to its great potential in the development of light-emitting diodes (LEDs). The influence of the molar ratio of the zinc acetate (ZnAc): KOH as a ZnO seed layer precursor on the density of interface defects and hence the presence of non-radiative recombination centers in LT-ACS of ZnO NRs/GaN LEDs has been systematically investigated. The material quality of the as-prepared seed layer as quantitatively deduced by the X-ray photoelectron spectroscopy is found to be influenced by the molar ratio. It is revealed by spatially resolved cathodoluminescence that the seed layer molar ratio plays a significant role in the formation and the density of defects at the n-ZnO NRs/p-GaN heterostructure interface. Consequently, LED devices processed using ZnO NRs synthesized with molar ratio of 1:5M exhibit stronger yellow emission (similar to 575 nm) compared to those based on 1:1 and 1:3M ratios as measured by the electroluminescence. Furthermore, seed layer molar ratio shows a quantitative dependence of the non-radiative defect densities as deduced from light-output current characteristics analysis. These results have implications on the development of high-efficiency ZnO-based LEDs and may also be helpful in understanding the effects of the ZnO seed layer on defect-related non-radiative recombination. Published by AIP Publishing.

Place, publisher, year, edition, pages
AMER INST PHYSICS, 2016
National Category
Materials Chemistry
Identifiers
urn:nbn:se:liu:diva-129174 (URN)10.1063/1.4947593 (DOI)000375929900043 ()
Note

Funding Agencies|Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linkoping University (Faculty Grant SFO-Mat-LiU) [2009-00971]

Available from: 2016-06-13 Created: 2016-06-13 Last updated: 2017-11-28
Khranovskyy, V., Shtepliuk, I., Ivanov, I. G., Tsiaoussis, I. & Yakimova, R. (2016). Light emission enhancement from ZnO nanostructured films grown on Gr/SiC substrates. Carbon, 99, 295-301
Open this publication in new window or tab >>Light emission enhancement from ZnO nanostructured films grown on Gr/SiC substrates
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2016 (English)In: Carbon, ISSN 0008-6223, E-ISSN 1873-3891, Vol. 99, p. 295-301Article in journal (Refereed) Published
Abstract [en]

We report on the application of a single layer graphene substrates for the growth of polycrystalline ZnO films with advanced light emission properties. Unusually high ultraviolet (UV) and visible (VIS) photoluminesce was observed from the ZnO/Gr/SiC structures in comparison to identical samples without graphene. The photoluminescence intensity depends non-monotonically on the films thickness, reaching its maximum for 150 nm thick films. The phenomena observed is explained as due to the dual graphene role: i) the dangling bond free substrate, providing growth of relaxed thin ZnO layers ii) a back reflector active mirror of the Fabry-Perot cavity that is formed. The reported results demonstrate the potential of two-dimensional carbon materials integration with light emitting wide band gap semiconductors and can be of practical importance for the design of future optoelectronic devices.

Place, publisher, year, edition, pages
Pergamon Press, 2016
National Category
Condensed Matter Physics
Identifiers
urn:nbn:se:liu:diva-123947 (URN)10.1016/j.carbon.2015.12.010 (DOI)000369069800035 ()
Note

Funding agencies:  Linkoping Linnaeus Initiative for Novel Functional Materials (LiLi-NFM); Angpanneforeningens Forskningsstiftelse [14-517]; European Union [604391]

Available from: 2016-01-14 Created: 2016-01-14 Last updated: 2017-11-30Bibliographically approved
Tereshchenko, A., Bechelany, M., Viter, R., Khranovskyy, V., Smyntyna, V., Starodub, N. & Yakimova, R. (2016). Optical biosensors based on ZnO nanostructures: advantages and perspectives. A review. Sensors and actuators. B, Chemical, 229, 664-677
Open this publication in new window or tab >>Optical biosensors based on ZnO nanostructures: advantages and perspectives. A review
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2016 (English)In: Sensors and actuators. B, Chemical, ISSN 0925-4005, E-ISSN 1873-3077, Vol. 229, p. 664-677Article, review/survey (Refereed) Published
Abstract [en]

This review article highlights the application of beneficial physico-chemical properties of ZnO nanostructures for the detection of wide range of biological compounds. As the medical diagnostics require accurate, fast and inexpensive biosensors, the advantages inherent optical methods of detection are considered. The crucial points of the immobilization process, responsible for biosensor performance (biomolecule adsorption, surface properties, surface defects role, surface functionalization etc.) along with the interaction mechanism between biomolecules and ZnO are disclosed. The latest achievements in surface plasmon resonance (SPR), surface enhanced Raman spectroscopy (SERS) and photoluminescence based biosensors along with novel trends in the development of ZnO biosensor platform are presented. (c) 2016 Elsevier B.V. All rights reserved.

Place, publisher, year, edition, pages
ELSEVIER SCIENCE SA, 2016
Keywords
Optical biosensors; ZnO; Nanostructures; Immobilization; Photoluminescence based biosensors; Interaction mechanism
National Category
Chemical Sciences
Identifiers
urn:nbn:se:liu:diva-127247 (URN)10.1016/j.snb.2016.01.099 (DOI)000372525400077 ()
Note

Funding Agencies|EC [318520]

Available from: 2016-04-22 Created: 2016-04-19 Last updated: 2017-11-30
Sadollah Khani, A., Nour, O., Willander, M., Kazeminezhad, I., Khranovskyy, V., Eriksson, M. O., . . . Holtz, P.-O. (2015). A detailed optical investigation of ZnO@ZnS core-shell nanoparticles and their photocatalytic activity at different pH values. Ceramics International, 41(5), 7174-7184
Open this publication in new window or tab >>A detailed optical investigation of ZnO@ZnS core-shell nanoparticles and their photocatalytic activity at different pH values
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2015 (English)In: Ceramics International, ISSN 0272-8842, E-ISSN 1873-3956, Vol. 41, no 5, p. 7174-7184Article in journal (Refereed) Published
Abstract [en]

In this study zinc oxide nanoparticles (NPs) were synthesized via a co-precipitation method and were covered by zinc sulfate using a chemical approach at a temperature of 60 degrees C forming ZnO@ZnS core-shell nanoparticles (CSNPs). In order to investigate the effect of the shell thickness on the optical and photocatalytic properties, many samples were grown with different concentration of the sulfur source. The results show that, covering ZnO with ZnS leads to form a type II band alignment system. In addition, the band gap of the ZnO@ZnS CSNPs was found less than both of the core and the shell materials. Also the emission peak intensity of the ZnO NPs changes as a result of manipulating oxygen vacancies via covering. The photocatalytic activity of the ZnO@ZnS CSNPs was invpstigated for degradation of the Congo red dye. As dye pollutants can be found in mediums with different pH, the experiments were performed at three pH values to determine the best photocatalyst for each pH. Congo red dye degradation experiments indicate that the ZnO@ZnS CSNPs act more efficiently as a photcatalyst at pH values of 4 and 7 compare to the pure ZnO NPs.

Place, publisher, year, edition, pages
Elsevier, 2015
Keywords
A. Chemical preparation; B. Spectroscopy; C. Optical properties; D. ZnO
National Category
Electrical Engineering, Electronic Engineering, Information Engineering Chemical Sciences
Identifiers
urn:nbn:se:liu:diva-118021 (URN)10.1016/j.ceramint.2015.02.040 (DOI)000353176400070 ()
Note

Funding Agencies|Shahid Chamran University; Linkoping University; Linkoping Linne Initiative

Available from: 2015-05-21 Created: 2015-05-20 Last updated: 2018-02-13
Khomyak, V., Shtepliuk, I., Khranovskyy, V. & Yakimova, R. (2015). Band-gap engineering of ZnO1-xSx films grown by rf magnetron sputtering of ZnS target. Vacuum, 121, 120-124
Open this publication in new window or tab >>Band-gap engineering of ZnO1-xSx films grown by rf magnetron sputtering of ZnS target
2015 (English)In: Vacuum, ISSN 0042-207X, E-ISSN 1879-2715, Vol. 121, p. 120-124Article in journal (Refereed) Published
Abstract [en]

Structural and optical properties of ZnO1-xSx (0 less than= x less than= 1.0) thin films grown onto sapphire substrates (c-Al2O3) at 300 degrees C by radio frequency (rf) magnetron sputtering of ZnS ceramic target are studied. A possibility of purposeful controlling sulfur content and, as consequence, ZnO1-xSx band gap energy via changing the ratio of the partial pressures of argon and oxygen are revealed. Linear dependence of ZnO lattice parameter c on S content suggests that structural properties of single-phase ternary alloys in the composition range between ZnO and ZnS obey Vegards law. The mechanisms of influence of gas mixing ratio on film growth and band gap energy are discussed. Cu(In,Ga)Se-2 (CIGS)-based heterojunction solar cells with ZnO1-xSx buffer layers were fabricated by one-cycle magnetron sputtering procedure. Electrical characteristics of Cd-free devices are comparable to those of CdS-containing photovoltaic heterostructures, thereby indicating prospects of using ZnO1-xSx layers for fabrication of CIGS solar cells. (C) 2015 Elsevier Ltd. All rights reserved.

Place, publisher, year, edition, pages
PERGAMON-ELSEVIER SCIENCE LTD, 2015
Keywords
ZnO; ZnS; Band-gap energy; Film deposition; Bowing parameter; Solar cells
National Category
Chemical Sciences
Identifiers
urn:nbn:se:liu:diva-122416 (URN)10.1016/j.vacuum.2015.08.008 (DOI)000362619000019 ()
Note

Funding Agencies|Swedish Institute

Available from: 2015-11-02 Created: 2015-11-02 Last updated: 2017-12-01
Khranovskyy, V. & Yakimova, R. (Eds.). (2015). Book of Abstracts: 1st International Workshop on Functional Oxide (FOX) Materials. Linköping: Linköping University Electronic Press
Open this publication in new window or tab >>Book of Abstracts: 1st International Workshop on Functional Oxide (FOX) Materials
2015 (English)Conference proceedings (editor) (Other academic)
Abstract [en]

Oxide semiconductors are an important part of the functional materials  field. Technological accessibility (physical & chemical synthesis), diversity of geometrical shapes (bulk, films, nanostructures) and environmental stability combined with ambience sensitivity makes them promising materials for plenty of future applications. Among other, ZnO, Al2O3, GaO, NiO, TiOx, Gd2O3, Fe3O4 and graphene oxide are considered as materials for both active and passive components in many applications: transparent conductive coatings, gas sensors, biosensors, tomography markers, light emitters, thermoelectric materials, catalysts and many others. We expect the experts to present their latest results on fabrication, characterization and application of the oxide materials.

Place, publisher, year, edition, pages
Linköping: Linköping University Electronic Press, 2015. p. 15
Series
Linköping University Electronic Press Workshop and Conference Collection ; 2015:5
National Category
Physical Sciences Chemical Engineering
Identifiers
urn:nbn:se:liu:diva-122600 (URN)
Available from: 2015-11-11 Created: 2015-11-11 Last updated: 2015-11-11Bibliographically approved
Sodzel, D., Khranovskyy, V., Beni, V., Turner, A. P., Viter, R., Eriksson, M. O., . . . Yakimova, R. (2015). Control of hydrogen peroxide and glucose via UV and Visible Photoluminescence of ZnO nanoparticles.. Microchimica Acta, 182(9-10), 1819-1826
Open this publication in new window or tab >>Control of hydrogen peroxide and glucose via UV and Visible Photoluminescence of ZnO nanoparticles.
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2015 (English)In: Microchimica Acta, ISSN 0026-3672, E-ISSN 1436-5073, Vol. 182, no 9-10, p. 1819-1826Article in journal (Refereed) Published
Abstract [en]

We report on an indirect optical method for the determination of glucose via the detection of hydrogen peroxide (H2O2) that is generated during the glucose oxidase (GOx) catalyzed oxidation of glucose. It is based on the finding that the ultraviolet (~374 nm) and visible (~525 nm) photoluminescence of pristine zinc oxide (ZnO) nanoparticles strongly depends on the concentration of H2O2 in water solution. Photoluminescence is quenched by up to 90 % at a 100 mM level of H2O2. The sensor constructed by immobilizing GOx on ZnO nanoparticles enabled glucose to be continuously monitored in the 10 mM to 130 mM concentration range, and the limit of detection is 10 mM. This enzymatic sensing scheme is supposed to be applicable to monitoring glucose in the food, beverage and fermentation industries. It has a wide scope in that it may be extended to numerous other substrate or enzyme activity assays based on the formation of H2O2, and of assays based on the consumption of H2O2 by peroxidases.

Place, publisher, year, edition, pages
Springer Netherlands, 2015
National Category
Materials Chemistry
Identifiers
urn:nbn:se:liu:diva-118305 (URN)10.1007/s00604-015-1493-9 (DOI)000356449700030 ()
Available from: 2015-05-26 Created: 2015-05-26 Last updated: 2017-12-04
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