Analysis of the Electrophysical and Photoelectric Properties of Nanocomposite Polymers by the Modified Kelvin Probe

Pantsialeyeu, K. U.; Krautsevich, A. U.; Rovba, I. A.; Lysenko, V. I.; Vorobey, R. I.; Gusev, O. K.; Жарин, А. Л.

doi:10.21122/2220-9506-2017-8-4-55-62

Cited by 5 publications

(5 citation statements)

References 14 publications

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“…Previous studies have shown that such coatings have an antibacterial effect [7]. Many works are devoted to the modification of porous materials [7,13,25,26] confirm the positive effect of the gradual release of antibacterial additives. This allows for a longer antiseptic effect on bacteria and prevents possible complications in case of infection in the implantation area.…”

Section: Resultsmentioning

confidence: 86%

“…The electrical potential (EP) was measured using the contact potential difference (CPD) method. The nonvibrating CPD method based on the Kelvin scanning probe method was implemented on a specialized scanning unit (Belarusian National Technical University (Minsk, Belarus)) to measure the electrical properties of CP coatings [24,25]. For evaluation of the corrosion behavior of the CP coatings on titanium substrates Versa STAT MC system (Princeton Applied Research, Oak Ridge, TN, USA) was used.…”

Section: Materials and Experimental Methodsmentioning

confidence: 99%

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Structure and electrical potential of calcium phosphate coatings modified with aluminum oxyhydroxide nanoparticles

et al. 2022

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The effect of the introduction of charged aluminum oxyhydroxide (AO) nanoparticles into the porous coatings from calcium phosphate formed by micro-arc oxidation on their electrical potential and structure was studied. The modification resulted in changes in the morphology and elemental composition of the coatings. The selection of coating functionalization parameters resulted in obtaining homogeneously distributed aluminum oxyhydroxide nanoparticles in the form of agglomerates, providing the maximum change in the electrical potential of the coatings. An increase in the duration of ultrasonic dispersion (USD) of initial AlN powder suspension from 10 to 60 min and an increase in the surface roughness of the coatings, parameter R a , from 3.5 to 5.5 µm led to an increase in the surface electrical potential from −85 to −35 mV. At the same time, the aluminum content in the coating decreased from 3 to 1 at.% with an increase in the duration of USD of the AlN powder suspension from 10 to 60 minutes. The introduction of aluminum oxyhydroxide nanoparticles into the coating contributed to an improvement in corrosion properties, namely, an increase in the corrosion potential from 0.1 to 0.2 mV and a decrease in the corrosion current from 2.5 •10 −9 to 1.1•10 −9 A • cm 2 .

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Section: Resultsmentioning

confidence: 86%

Section: Materials and Experimental Methodsmentioning

confidence: 99%

Structure and electrical potential of calcium phosphate coatings modified with aluminum oxyhydroxide nanoparticles

et al. 2022

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“…The response of the surface electrostatic potential of polymer materials to external mechanical action was found earlier in [8]. This study used matrix high-pressure polyethylene (LDPE) 12203-250 grade as samples.…”

Section: Resultsmentioning

confidence: 88%

“…First, understanding of polymer charge mechanisms is of significant practical interest, for example, in manufacturing antistatic and insulating materials, fiber production, polymer recycling, etc. [7] Second, there is now a large arsenal of methods for the study of surface electrostatic potentials, and new methods are constantly being developed that can clarify the existing theoretical positions [7,8,14].…”

Section: Introductionmentioning

confidence: 99%

Digital Contact Potential Probe in Studying the Deformation of Dielectric Materials

Pantsialeyeu

Жарин

Gusev

et al. 2020

IAPGOS

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The paper reviews the results of a study on the surface electrostatic charges of dielectrics obtained using the contact potential difference (CPD) technique. Initially, the CPD technique was only applied to the study of metal and semiconductor surfaces. The conventional CPD measurement technique requires full compensation of the measured potential that, in the case of dielectrics, could reach very high values. Such high potentials are hard to compensate. Therefore, the conventional CPD method is rarely applied in the study of dielectric materials. Some important improvements recently made to the CPD measurement technique removed the need for compensation. The new method, which does not require compensation, has been implemented in the form of a digital Kelvin probe. The paper describes the principles of the non-compensation CPD measurement technique which was developed for mapping the electrostatic surface charge space distribution across a wide range of potential values. The study was performed on polymers such as low-density polyethylene (LDPE) and polytetrafluoroethylene (PTFE).

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“…The morphology of the samples was investigated by scanning electron microscopy (SEM) on LEO EVO 50 electron microscope (Zeiss, Germany) equipped with an INCA-Energy 350 EDS analyser (Oxford Instruments, Abingdon, UK) in Nanotech Centre of Collective Use, ISPMS SB RAS. The electrical potential (EP) was measured using contact potential differences (CPD) techniques on a specialized scanning installation (Belarusian National Technical University (Minsk, Belarus)) to measure EP of the CP coatings [4].The coating thickness before modification was equal to 40-45 µm. Its surface morphology was characterized by the presence of numerous spherical structural elements of up to 10-30 µm with pores.…”

mentioning

confidence: 99%

CHARACTERIZATION OF PROPERTIES OF CALCIUM PHOSPHATE COATING CONTAINING ZnO NANOPARTICLES

Chebodaeva¹,

Sedelnikova²,

Zharin³

et al. 2022

Physical Mesomechanics of Materials. Physical Principles of Multi-Layer Structure Forming and Mechanisms of Non-Linear Behavior

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Despite existing materials for reconstruction/replacement bone defect there is an urgent need for new biomaterial with high biocompatibility and antimicrobial properties [1][2]. Material modification is a perspective and potent approach in the development of new biomaterials for tissue engineering. Surface post treatment technologies can significantly improve bone tissue-material interactions in a biological environment. Modifications related to surface morphology, wettability, charge and chemical composition can improve cellular biocompatibility, cell adhesion, proliferation and their differentiation [1][2].Micro arc oxidation (MAO) is regarded as a technological and versatile tool to coat metal implants allowing modified surface topography, chemistry and electrical properties for improved bioactivity [2]. In this work the CP coatings was formed on titanium alloy. Due to high strength-toweight ratio and corrosion resistance, titanium and its alloys are considered to be among the most promising materials for use as bone implants. An urgent and large problem is the creation of effective methods to overcoming the bacterial resistance of medical implants due to the rapid growth in the number of resistant strains of microorganisms. The zinc oxide (ZO) nanoparticles are perspective alternative antibacterial component for biomaterial modification. Therefore, a number of researches in the field of their antibacterial activity, toxic action, mechanisms of biological action, molecular targets is increased [3]. ZO nanoparticles are characterized by small size, high surface area and positive zeta potential [3]. Moreover, the size, surface charge, and shape of ZO nanoparticles affect the nature of their interaction with cells. The functionalization of biomaterials using such nanoparticles enhance their cellular interactions.Therefore, the aim of the present research was the formation of micro arc coatings with ZO nanoparticles on the titanium surface as well as the investigation morphology, phase composition and electrical potential of the coatings.Titanium samples (10х10 mm 2 ) were fabricated from commercially pure titanium (grade 2). The electrolyte contained water solution of 30% solution of Н3РО4, CaCO3 (100 g/) and Cа10(PO4)6(OH)2 (60 g/l) [2]. Micro arc biocoatings were applied using anodic potentiostatic mode with the following MAO parameters: treatment voltage = 200 V, pulse duration = 100 µs, pulse repetition rate = 50 Hz, coating deposition duration = 10 min [2]. Obtained porous coatings were functionalized by ZO nanoparticles. The ZO nanoparticles powder were produced by the electrical explosion of zinc wire in an argon and oxygen atmosphere as described previously [2]. The suspension containing 30 mg of ZO nanopowder and 25 ml of distilled water was subjected to ultrasonic dispersion (UD) with different durations. The coatings were immersed in the prepared suspension and subjected to ultrasonic treatment for 5 min. The morphology of the samples was investigated by scanning electron microscopy (SEM) on LEO EVO 50...

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Analysis of the Electrophysical and Photoelectric Properties of Nanocomposite Polymers by the Modified Kelvin Probe

Cited by 5 publications

References 14 publications

Structure and electrical potential of calcium phosphate coatings modified with aluminum oxyhydroxide nanoparticles

Structure and electrical potential of calcium phosphate coatings modified with aluminum oxyhydroxide nanoparticles

Digital Contact Potential Probe in Studying the Deformation of Dielectric Materials

CHARACTERIZATION OF PROPERTIES OF CALCIUM PHOSPHATE COATING CONTAINING ZnO NANOPARTICLES

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