Pub Date : 2021-09-05DOI: 10.1109/NAP51885.2021.9568558
N. Andrushchak, V. Adamiv, V. Haiduchok, I. Teslyuk, Y. Yashchyshyn, A. Andrushchak
In this paper, the modified technology of nanoporous aluminum oxide (Al2O3) matrices filling with the KDP, ADP, and TGS crystals is proposed. The transmission spectra of the grown structures were studied at 300 -3000 nm and 50-1200 GHz spectral ranges. Because of the performed investigation, due to the significant transmission of nanoporous matrices in the terahertz range, in-depth analysis needs to be performed for their use as substrates for the implementation of nanoplasmonic devices, given the regular (periodic) structure of nanopores in these matrices.
{"title":"Transmission Spectra Investigation of Nanoporous Al2O3 Matrices Filled with KDP, ADP and TGS Crystals at Visible, NIR, and SubTerahertz Ranges","authors":"N. Andrushchak, V. Adamiv, V. Haiduchok, I. Teslyuk, Y. Yashchyshyn, A. Andrushchak","doi":"10.1109/NAP51885.2021.9568558","DOIUrl":"https://doi.org/10.1109/NAP51885.2021.9568558","url":null,"abstract":"In this paper, the modified technology of nanoporous aluminum oxide (Al2O3) matrices filling with the KDP, ADP, and TGS crystals is proposed. The transmission spectra of the grown structures were studied at 300 -3000 nm and 50-1200 GHz spectral ranges. Because of the performed investigation, due to the significant transmission of nanoporous matrices in the terahertz range, in-depth analysis needs to be performed for their use as substrates for the implementation of nanoplasmonic devices, given the regular (periodic) structure of nanopores in these matrices.","PeriodicalId":6735,"journal":{"name":"2021 IEEE 11th International Conference Nanomaterials: Applications & Properties (NAP)","volume":"41 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2021-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89587868","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-09-05DOI: 10.1109/NAP51885.2021.9568589
N. Atamas, D. Gavryushenko, G. Taranyk, V. Kashchenko
The correct method for the determination of the structure of water-alcohol solution at different concentration by using Monte Carlo (MC) simulation ware developed and was used to study of aqueous solution of propanol. It was found that at the concentrations lower than $X_{pr} sim 0.04$ mole propanol molecules do not influence on the physical-chemical properties of water in water-propanol solution; at the concentration $X_{pr} sim 0.2$ mole the fluctuations in the form of the clusters of propanol molecules at concentration was determined; at the concentration range $X_{pr} sim (0.3-0.38)$ mole propanol molecules form the micelles.
{"title":"Clustering in Water-Propanol Solutions","authors":"N. Atamas, D. Gavryushenko, G. Taranyk, V. Kashchenko","doi":"10.1109/NAP51885.2021.9568589","DOIUrl":"https://doi.org/10.1109/NAP51885.2021.9568589","url":null,"abstract":"The correct method for the determination of the structure of water-alcohol solution at different concentration by using Monte Carlo (MC) simulation ware developed and was used to study of aqueous solution of propanol. It was found that at the concentrations lower than $X_{pr} sim 0.04$ mole propanol molecules do not influence on the physical-chemical properties of water in water-propanol solution; at the concentration $X_{pr} sim 0.2$ mole the fluctuations in the form of the clusters of propanol molecules at concentration was determined; at the concentration range $X_{pr} sim (0.3-0.38)$ mole propanol molecules form the micelles.","PeriodicalId":6735,"journal":{"name":"2021 IEEE 11th International Conference Nanomaterials: Applications & Properties (NAP)","volume":"22 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2021-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86485849","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-09-05DOI: 10.1109/NAP51885.2021.9568557
Yu.M. Shabelnyk, A. Chornous, L. Dekhtyaruk, D. Saltykov, Y. Shkurdoda, P. Pavlov
Using two-point [1], [2] and resistor [3] –[8] models, an analysis of the effect of giant magnetoresistance (GMR) in an asymmetric (the magnetic components of a conductor are made of different ferromagnetic metals or different alloys based on them, or one component is an alloy and the other is a metal) magnetically ordered three-layer film (sandwich) was carried out depending on the change in the thickness of the metal covering magnetic layer dm2 and it was shown that when the approximate equality $d_{m1}cong d_{m2}(d_{m1}$- thickness of the base magnetic layer, $d_{n}-$ thickness of the non-magnetic layer (spacer)) the value of the GMR effect reaches its maximum due to the absence of the shunting effect. Using the sandwich model with an ultrathin interlayer, it is theoretically shown that with the experimentally measured amplitude value of the magnetoresistance ratio (MRR) and knowledge of the asymmetry parameter in spin-polarized electron scattering in the base magnetic layer, it is theoretically possible to calculate the above mentioned asymmetry parameter in the covering magnetic layer.
{"title":"Giant Magnetoresistive Effect in Magnetically Ordered Asymmetric Sandwiches Based on Co and Fe","authors":"Yu.M. Shabelnyk, A. Chornous, L. Dekhtyaruk, D. Saltykov, Y. Shkurdoda, P. Pavlov","doi":"10.1109/NAP51885.2021.9568557","DOIUrl":"https://doi.org/10.1109/NAP51885.2021.9568557","url":null,"abstract":"Using two-point [1], [2] and resistor [3] –[8] models, an analysis of the effect of giant magnetoresistance (GMR) in an asymmetric (the magnetic components of a conductor are made of different ferromagnetic metals or different alloys based on them, or one component is an alloy and the other is a metal) magnetically ordered three-layer film (sandwich) was carried out depending on the change in the thickness of the metal covering magnetic layer dm2 and it was shown that when the approximate equality $d_{m1}cong d_{m2}(d_{m1}$- thickness of the base magnetic layer, $d_{n}-$ thickness of the non-magnetic layer (spacer)) the value of the GMR effect reaches its maximum due to the absence of the shunting effect. Using the sandwich model with an ultrathin interlayer, it is theoretically shown that with the experimentally measured amplitude value of the magnetoresistance ratio (MRR) and knowledge of the asymmetry parameter in spin-polarized electron scattering in the base magnetic layer, it is theoretically possible to calculate the above mentioned asymmetry parameter in the covering magnetic layer.","PeriodicalId":6735,"journal":{"name":"2021 IEEE 11th International Conference Nanomaterials: Applications & Properties (NAP)","volume":"36 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2021-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88555030","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-09-05DOI: 10.1109/NAP51885.2021.9568532
O. Chukova, T. Voitenko, Houri Sadat Rahimi Mosafer, S. Nedilko, A. Papadopoulos, W. Paszkowicz, S. Nedilko, E. Stratakis, M. Etter
The EuVO4 nanoparticles doped with Ca2+ impurities were synthesized by citrate-nitrate sol-gel method and investigated. Diffuse reflection spectra of the EuVO4:Ca samples contain two additional bands around 400 and 470 nm those were not observed for the undoped EuVO4. These bands were ascribed to Ca-induced defects in the vanadate crystal lattice. Origin of these defects is studied taking into account results of high resolution XRD measurements. The additive XRD peaks were found for the Eu0.8Ca0.2VO4, sample. These peaks were identified as traces of the Ca2V2O7 second crystal phase in the synthesized nanoparticles. The maximal concentrations of the Ca2+ heterovalent impurity permits to keep single phase EuVO4:Ca sol-gel nanoparticles were estimated.
{"title":"Study of Structure of Defect Centers in Europium Vanadate Nanoparticles with Heterovalent Dopants","authors":"O. Chukova, T. Voitenko, Houri Sadat Rahimi Mosafer, S. Nedilko, A. Papadopoulos, W. Paszkowicz, S. Nedilko, E. Stratakis, M. Etter","doi":"10.1109/NAP51885.2021.9568532","DOIUrl":"https://doi.org/10.1109/NAP51885.2021.9568532","url":null,"abstract":"The EuVO<inf>4</inf> nanoparticles doped with Ca<sup>2+</sup> impurities were synthesized by citrate-nitrate sol-gel method and investigated. Diffuse reflection spectra of the EuVO<inf>4</inf>:Ca samples contain two additional bands around 400 and 470 nm those were not observed for the undoped EuVO<inf>4</inf>. These bands were ascribed to Ca-induced defects in the vanadate crystal lattice. Origin of these defects is studied taking into account results of high resolution XRD measurements. The additive XRD peaks were found for the Eu<inf>0.8</inf>Ca<inf>0.2</inf>VO<inf>4</inf>, sample. These peaks were identified as traces of the Ca<inf>2</inf>V<inf>2</inf>O<inf>7</inf> second crystal phase in the synthesized nanoparticles. The maximal concentrations of the Ca<sup>2+</sup> heterovalent impurity permits to keep single phase EuVO<inf>4</inf>:Ca sol-gel nanoparticles were estimated.","PeriodicalId":6735,"journal":{"name":"2021 IEEE 11th International Conference Nanomaterials: Applications & Properties (NAP)","volume":"48 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2021-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79172056","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-09-05DOI: 10.1109/NAP51885.2021.9568512
V. Ivashchenko, A. Onoprienko, P. Scrynskyy, Andriy Kozak, E. Olifan, A. Kovalchenko, A. Sinelnitchenko, Alexander Marchuk
The films in Ti-B-C system have been deposited onto Si (100) substrates by dual direct current magnetron sputtering of TiB2 and B4 C targets. During deposition, the sputtering parameters at the TiB2 target were unchanged, whereas sputtering current at the B4 C target was varied in the range of 50-200 mA. The films were characterized in terms of their structure, composition, and mechanical properties. The X-ray diffraction measurements showed that all the films contain only TiB2 crystalline phase of prominent (001) and (002) textures. The film hardness first increased reaching maximum value of about 53.5 GPa for films deposited with 100 mA B4 C sputtering current, and then it decreased with increasing current. The coefficient of friction of films was unchanged with increasing the sputtering current at B4 C target.
{"title":"Structure and Properties of Ti-B-C Films Deposited by DC Magnetron Sputtering of TiB2 and B4 C Targets","authors":"V. Ivashchenko, A. Onoprienko, P. Scrynskyy, Andriy Kozak, E. Olifan, A. Kovalchenko, A. Sinelnitchenko, Alexander Marchuk","doi":"10.1109/NAP51885.2021.9568512","DOIUrl":"https://doi.org/10.1109/NAP51885.2021.9568512","url":null,"abstract":"The films in Ti-B-C system have been deposited onto Si (100) substrates by dual direct current magnetron sputtering of TiB2 and B4 C targets. During deposition, the sputtering parameters at the TiB2 target were unchanged, whereas sputtering current at the B4 C target was varied in the range of 50-200 mA. The films were characterized in terms of their structure, composition, and mechanical properties. The X-ray diffraction measurements showed that all the films contain only TiB2 crystalline phase of prominent (001) and (002) textures. The film hardness first increased reaching maximum value of about 53.5 GPa for films deposited with 100 mA B4 C sputtering current, and then it decreased with increasing current. The coefficient of friction of films was unchanged with increasing the sputtering current at B4 C target.","PeriodicalId":6735,"journal":{"name":"2021 IEEE 11th International Conference Nanomaterials: Applications & Properties (NAP)","volume":"26 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2021-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87296222","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-09-05DOI: 10.1109/NAP51885.2021.9568559
A. Artyukhov, I. Volk, N. Artyukhova, Nataliya Borozenets
The article is devoted to the description of functioning conditions for the granulation module for the porous ammonium nitrate (PAN) production. We present general information on ammonium nitrate structure role in the process of ensuring the quality indicators of an industrial explosive. We substantiate the necessity of using PAN in the industrial explosives production. We introduce a method for obtaining PAN by humidification followed by thermal processing in apparatus with various configurations of fluidized bed and the use of active hydrodynamic modes. A technological scheme for implementing the method is described. We give a brief description of the hardware design of the granulation and final drying stage. The results of microscopic analysis of PAN granules are presented and the nanoporous structure features are described. The technique of technological calculation of the granulation device for the PAN production is proposed.
{"title":"Ammonium Nitrate with Nanoporous Structure Production Unit: Foundations of Creation, Operation Principles, Product Quality Indicators","authors":"A. Artyukhov, I. Volk, N. Artyukhova, Nataliya Borozenets","doi":"10.1109/NAP51885.2021.9568559","DOIUrl":"https://doi.org/10.1109/NAP51885.2021.9568559","url":null,"abstract":"The article is devoted to the description of functioning conditions for the granulation module for the porous ammonium nitrate (PAN) production. We present general information on ammonium nitrate structure role in the process of ensuring the quality indicators of an industrial explosive. We substantiate the necessity of using PAN in the industrial explosives production. We introduce a method for obtaining PAN by humidification followed by thermal processing in apparatus with various configurations of fluidized bed and the use of active hydrodynamic modes. A technological scheme for implementing the method is described. We give a brief description of the hardware design of the granulation and final drying stage. The results of microscopic analysis of PAN granules are presented and the nanoporous structure features are described. The technique of technological calculation of the granulation device for the PAN production is proposed.","PeriodicalId":6735,"journal":{"name":"2021 IEEE 11th International Conference Nanomaterials: Applications & Properties (NAP)","volume":"83 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2021-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85960903","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-09-05DOI: 10.1109/NAP51885.2021.9568530
K.G. Ayvazyan, M. V. Katkov, M. Lebedev, G. Ayvazyan
We present investigations of optical properties of black silicon (b-Si) nanostructures passivated with several high-k metal oxides (Al2 O3, TiO2, HfO2 and Sc2 O3), obtained by atomic layer deposition (ALD) method. The reflectivity was studied using the finite difference time domain (FDTD) method as well as experimentally, where Si wafers was structured by reactive ion etching method for b-Si fabrication. Modeling and measurements show improvements in the antireflection properties of thin-film/b-Si nanostructures over a wide range of light wavelengths. TiO2, HfO2 and Sc2 O3 films provide a good alternative to Al2 O3 as passivating materials and antireflection coatings.
{"title":"Enhanced Light-trapping with Conformal ALD Coating of Black Silicon by High-k Metal Oxides","authors":"K.G. Ayvazyan, M. V. Katkov, M. Lebedev, G. Ayvazyan","doi":"10.1109/NAP51885.2021.9568530","DOIUrl":"https://doi.org/10.1109/NAP51885.2021.9568530","url":null,"abstract":"We present investigations of optical properties of black silicon (b-Si) nanostructures passivated with several high-k metal oxides (Al<inf>2</inf> O<inf>3</inf>, TiO<inf>2</inf>, HfO<inf>2</inf> and Sc<inf>2</inf> O<inf>3</inf>), obtained by atomic layer deposition (ALD) method. The reflectivity was studied using the finite difference time domain (FDTD) method as well as experimentally, where Si wafers was structured by reactive ion etching method for b-Si fabrication. Modeling and measurements show improvements in the antireflection properties of thin-film/b-Si nanostructures over a wide range of light wavelengths. TiO<inf>2</inf>, HfO<inf>2</inf> and Sc<inf>2</inf> O<inf>3</inf> films provide a good alternative to Al<inf>2</inf> O<inf>3</inf> as passivating materials and antireflection coatings.","PeriodicalId":6735,"journal":{"name":"2021 IEEE 11th International Conference Nanomaterials: Applications & Properties (NAP)","volume":"24 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2021-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78162966","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-09-05DOI: 10.1109/NAP51885.2021.9568521
M. Vasyukhno, V. S. Klochok, N. I. Shumakova, A. Rylova, I. Protsenko
In the phenomenological approximation, the relations for the differential temperatures coefficient of resistance $left(beta_{T}=frac{partiallnrho}{partial T}right)$ and magnetic coefficient of resistance $left(beta_{B}=frac{partiallnrho}{partial B}right)$, where $rho=sum_{(i)}c_{i}rho_{i}$, for multicomponent high-entropy film alloys (HEA) based on magnetic and non-magnetic metals are obtained. Experimental values $beta_{T},beta_{B}^{MR}$ and $beta_{B}^{GMR}quad$ agree well with the calculations, which allows for the prognosis of the value $beta_{T}$ for normal $beta_{B}^{M/R}$ and for giant $beta_{B}^{GMR}$ magnetoresistance based on experimental data for temperature and magnetic coefficients of individual components.
{"title":"Thermo- and Magnetoresistive Properties of Multicomponent Film Materials Based on Magnetic and Non-magnetic Metals","authors":"M. Vasyukhno, V. S. Klochok, N. I. Shumakova, A. Rylova, I. Protsenko","doi":"10.1109/NAP51885.2021.9568521","DOIUrl":"https://doi.org/10.1109/NAP51885.2021.9568521","url":null,"abstract":"In the phenomenological approximation, the relations for the differential temperatures coefficient of resistance $left(beta_{T}=frac{partiallnrho}{partial T}right)$ and magnetic coefficient of resistance $left(beta_{B}=frac{partiallnrho}{partial B}right)$, where $rho=sum_{(i)}c_{i}rho_{i}$, for multicomponent high-entropy film alloys (HEA) based on magnetic and non-magnetic metals are obtained. Experimental values $beta_{T},beta_{B}^{MR}$ and $beta_{B}^{GMR}quad$ agree well with the calculations, which allows for the prognosis of the value $beta_{T}$ for normal $beta_{B}^{M/R}$ and for giant $beta_{B}^{GMR}$ magnetoresistance based on experimental data for temperature and magnetic coefficients of individual components.","PeriodicalId":6735,"journal":{"name":"2021 IEEE 11th International Conference Nanomaterials: Applications & Properties (NAP)","volume":"34 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2021-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75057790","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-09-05DOI: 10.1109/NAP51885.2021.9568599
Vishal Shrivastav, S. Sundriyal, U. Tiwari, A. Deep
The new approach to synthesize porous Co3S4 nanoparticles derived from ZIF-67 polyhedrons decorated with WO3 rectangular sheets is demonstrated. Furthermore, the composite material is employed as a negative electrode for high energy density supercapacitor application. The one pot hydrothermal treatment of ZIF-67 with WO3 precursor give the Co3S4/WO3 composites. The obtained samples are evaluated with cyclic voltammetry, galvanostatic charge/discharge and electrochemical impedance spectroscopy tests. The composites delivered the highest specific capacitance of 668 F/g at the current density of 1 A/g in 1 M H2 SO4 electrolyte. Addition to this, the composite material remains stable upto 2000 cycles of charging/discharging cycles with 94% capacitance retention. The excellent electrochemical performance is attributed to the synergy between the sheet like WO3 structure and Co3S4 nanoparticles. The positive electrochemical results of the composites demonstrate its potential or practical hybrid supercapacitor application.
本文介绍了一种以ZIF-67多面体为材料，经WO3矩形片修饰制备多孔Co3S4纳米粒子的新方法。此外，该复合材料还被用作高能量密度超级电容器的负极。用WO3前驱体对ZIF-67进行一锅水热处理，得到Co3S4/WO3复合材料。用循环伏安法、恒流充放电法和电化学阻抗谱法对所得样品进行评价。在1 M H2 SO4电解质中，当电流密度为1 A/g时，复合材料的比电容最高可达668 F/g。除此之外，复合材料在2000次充电/放电循环中保持稳定，电容保持率为94%。优异的电化学性能归功于片状WO3结构与Co3S4纳米粒子之间的协同作用。该复合材料的良好电化学性能证明了其在混合超级电容器中的应用潜力。
{"title":"ZIF-67 Derived Co3S4/WO3 Composites as a Negative Electrode for Hybrid Supercapacitor Application","authors":"Vishal Shrivastav, S. Sundriyal, U. Tiwari, A. Deep","doi":"10.1109/NAP51885.2021.9568599","DOIUrl":"https://doi.org/10.1109/NAP51885.2021.9568599","url":null,"abstract":"The new approach to synthesize porous Co<inf>3</inf>S<inf>4</inf> nanoparticles derived from ZIF-67 polyhedrons decorated with WO<inf>3</inf> rectangular sheets is demonstrated. Furthermore, the composite material is employed as a negative electrode for high energy density supercapacitor application. The one pot hydrothermal treatment of ZIF-67 with WO<inf>3</inf> precursor give the Co<inf>3</inf>S<inf>4</inf>/WO<inf>3</inf> composites. The obtained samples are evaluated with cyclic voltammetry, galvanostatic charge/discharge and electrochemical impedance spectroscopy tests. The composites delivered the highest specific capacitance of 668 F/g at the current density of 1 A/g in 1 M H<inf>2</inf> SO<inf>4</inf> electrolyte. Addition to this, the composite material remains stable upto 2000 cycles of charging/discharging cycles with 94% capacitance retention. The excellent electrochemical performance is attributed to the synergy between the sheet like WO<inf>3</inf> structure and Co<inf>3</inf>S<inf>4</inf> nanoparticles. The positive electrochemical results of the composites demonstrate its potential or practical hybrid supercapacitor application.","PeriodicalId":6735,"journal":{"name":"2021 IEEE 11th International Conference Nanomaterials: Applications & Properties (NAP)","volume":"55 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2021-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76748065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-09-05DOI: 10.1109/NAP51885.2021.9568547
V. Prokopyuk, A. Onishchenko, S. Yefimova, T. Chumachenko, N. Kavok, P. Maksimchuk, V. Klochkov, A. Tkachenko
Aim. To assess the viability and functional activity of cultured rat skin fibroblasts directly exposed to various concentrations of GdYVO4:Eu3+ nanoparticles.Materials and methods. Cultured rat dermal fibroblasts (n=8) were incubated with GdYVO4:Eu3+ nanoparticles at different concentrations (0 - 320 μg/ml) for 24 h. The cytotoxicity was evaluated in a complex manner. In particular, the MTT assay was used to assess cellular metabolic activity. The viability of cells was quantitatively estimated using the neutral red uptake assay. To evaluate the effects of nanoparticles on the mobility of dermal fibroblasts, the scratch assay was used. Results. Our experimental data demonstrated that the GdYVO4:Eu3+ nanoparticles had no effect on fibroblast viability at any concentration used, evidenced by the results of neutral red uptake assay. However, incubation of cultured fibroblasts starting from the concentration of 80 μg/ml and above increased the metabolic activity of cells, based on the outcome of MTT assay, and promoted the loss of adhesion. Similarly, scratch assay revealed the reduction of fibroblast migration capacity in cells exposed to 80 μg/ml and higher concentrations of nanoparticles. Conclusions. Low concentrations of GdYVO4:Eu3+ (below 40 μg/ml) show no cytotoxic properties towards fibroblasts, while their higher concentrations affect the metabolic activity and functional properties of cells.
{"title":"Cytotoxicity Tests on Cultured Rat Skin Fibroblasts Revealed no Toxicity for Low Concentrations of GdYVO4:Eu3+ Nanoparticles","authors":"V. Prokopyuk, A. Onishchenko, S. Yefimova, T. Chumachenko, N. Kavok, P. Maksimchuk, V. Klochkov, A. Tkachenko","doi":"10.1109/NAP51885.2021.9568547","DOIUrl":"https://doi.org/10.1109/NAP51885.2021.9568547","url":null,"abstract":"Aim. To assess the viability and functional activity of cultured rat skin fibroblasts directly exposed to various concentrations of GdYVO4:Eu3+ nanoparticles.Materials and methods. Cultured rat dermal fibroblasts (n=8) were incubated with GdYVO4:Eu3+ nanoparticles at different concentrations (0 - 320 μg/ml) for 24 h. The cytotoxicity was evaluated in a complex manner. In particular, the MTT assay was used to assess cellular metabolic activity. The viability of cells was quantitatively estimated using the neutral red uptake assay. To evaluate the effects of nanoparticles on the mobility of dermal fibroblasts, the scratch assay was used. Results. Our experimental data demonstrated that the GdYVO4:Eu3+ nanoparticles had no effect on fibroblast viability at any concentration used, evidenced by the results of neutral red uptake assay. However, incubation of cultured fibroblasts starting from the concentration of 80 μg/ml and above increased the metabolic activity of cells, based on the outcome of MTT assay, and promoted the loss of adhesion. Similarly, scratch assay revealed the reduction of fibroblast migration capacity in cells exposed to 80 μg/ml and higher concentrations of nanoparticles. Conclusions. Low concentrations of GdYVO4:Eu3+ (below 40 μg/ml) show no cytotoxic properties towards fibroblasts, while their higher concentrations affect the metabolic activity and functional properties of cells.","PeriodicalId":6735,"journal":{"name":"2021 IEEE 11th International Conference Nanomaterials: Applications & Properties (NAP)","volume":"12 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2021-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82790597","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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