STUDYING MULTILAYERED GRAPHENES BY ELECTROPHYSICAL METHODS

2021 ◽  
pp. 100-107
Author(s):  
K. L. Levine ◽  
D. V. Ryabokon ◽  
S. D. Khanin ◽  
R. V. Gelamo ◽  
N. A. Nikonorova
Keyword(s):  
Electrical Conductivity ◽  
Chemical Composition ◽  
Electrical Properties ◽  
Work Function ◽  
Electron Work Function ◽  
Charge Storage ◽  
High Electrical Conductivity ◽  
Free Standing ◽  
Storage Devices

The paper studies multilayer graphenes in the form of free-standing films. The authors provide data about the morphology and electrical properties of films treated with plasma of various chemical composition. It is shown that it is possible to control the electrical properties of the surface and electron work function without significantly affecting its morphology. The obtained samples, combining mechanical flexibility with unreactiveness and high electrical conductivity, are promising for application in flexible charge storage devices.

scholarly journals Electrical properties of graphenes for application in electrochemical charge storage devices

2019 ◽  
Author(s):  
Kirill Lvovich Levin ◽  
Rojerio V. Jelamo ◽  
Nikolay S. Pshchelko ◽  
Samuil D. Khanin
Keyword(s):  
Thin Films ◽  
Electrical Conductivity ◽  
Energy Storage ◽  
Electrical Properties ◽  
Electric Energy ◽  
Charge Storage ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Electric Energy Storage ◽  
Different Types

Graphenes in the form of flexible thin films treated with different types of plasma were investigated by Mott-Schottky analysis. The possibility of variation of electrical conductivity in graphene prepared by plasma treatment was shown. Obtained materials are promising for electric energy storage devices.

scholarly journals Influence of the Chemical Composition on Electrical Conductivity and Mechanical Properties of the Hypoeutectic Al-Si-Mg Alloys

2016 ◽  
Vol 61 (1) ◽  
pp. 353-360 ◽  
Author(s):  
B. Dybowski ◽  
J. Szymszal ◽  
Ł. Poloczek ◽  
A. Kiełbus
Keyword(s):  
Mechanical Properties ◽  
Electrical Conductivity ◽  
Chemical Composition ◽  
Aluminium Alloys ◽  
Mg Alloys ◽  
High Electrical Conductivity ◽  
Transportation Industry ◽  
Proper Selection ◽  
Ti Addition ◽  
Selection Of

Due to low density and good mechanical properties, aluminium alloys are widely applied in transportation industry. Moreover, they are characterized by the specific physical properties, such as high electrical conductivity. This led to application of the hypoeutectic Al-Si-Mg alloys in the power generation industry. Proper selection of the alloys chemical composition is an important stage in achievement of the demanded properties. The following paper presents results of the research on the influence of alloys chemical composition on their properties. It has been revealed that Si and Ti addition decreases electrical conductivity of the Al-Si-Mg alloys, while Na addition increases it. The mechanical properties of the investigated alloys are decreased by both silicon and iron presence. Sodium addition increases ductility of the Al-Si-Mg alloys.

scholarly journals Control of Electrical and Optical Parameters of Humidity Sensors Active Elements Based on Tin Oxides Films with Variable Composition

2019 ◽  
Vol 10 (2) ◽  
pp. 138-150 ◽  
Author(s):  
D. V. Adamchuck ◽  
V. K. Ksenevich
Keyword(s):  
Electrical Conductivity ◽  
Electrical Properties ◽  
Gas Sensors ◽  
Annealing Temperature ◽  
Argon Plasma ◽  
Electromagnetic Spectrum ◽  
Optical And Electrical Properties ◽  
High Electrical Conductivity ◽  
Synthesis Parameters ◽  
Tin Oxides

The aim of this work is development of technique for synthesis of tin oxides films with various stoichiometric composition, characterized by high electrical conductivity and light transmittance in the UV and visible range of the electromagnetic spectrum, for their further application as humidity and gas sensors, as well as electrodes for electro-and photocatalytic converters.Nonstoichiometric SnO/SnO2 /SnO2−δ films were synthesized by reactive magnetron sputtering of tin onto glass substrates in argon plasma with oxygen addition and with subsequent thermal oxidation of the formed layers in air. To change the structural, optical, and electrical properties of the films and to find out the optimal synthesis parameters, the oxygen content during the deposition process and the annealing temperature in air were varied in the range of 0–2 vol. % and of 200–450 °C, respectively. The characterization of the films was carried out using a 4-probe method for measuring the electrical resistance, X-ray diffraction, and optical spectroscopy of light transmission.As a result of a comprehensive analysis of the structural, optical and electrical properties of the films, it was found that the optimal synthesis parameters to obtain the most transparent and conductive coatings promising for use as humidity, gas sensors and in photovoltaic devices are the following: oxygen content in argon plasma during sputtering process is ≈ 0,8–1,2 vol. %, the annealing temperature in air is ≈ 350–375 °C. In this case a polycrystalline film with high electrical conductivity and high transmittance in the visible and UV regions of the electromagnetic spectrum with prevailing of tin dioxide phase with structural defects (oxygen vacancies) is formed.

Inclusion Compounds of Tetracyano Complexes and Their Electrical Properties

1994 ◽  
Vol 59 (11) ◽  
pp. 2436-2446 ◽  
Author(s):  
Mária Reháková ◽  
Anna Sopková ◽  
Vladimír Šály
Keyword(s):  
Electrical Conductivity ◽  
Chemical Composition ◽  
Electrical Properties ◽  
General Formula ◽  
Inclusion Compounds ◽  
High Frequency ◽  
Iodide Ions ◽  
Structure And Morphology ◽  
Composition Structure ◽  
Tetracyano Complexes

The presence of iodine and iodide ions in tetracyanonickelates inclusion compounds with the general formula Ni(B)mNi(CN)4 . n H2O (B = NH3 or ethylenediamine) changes the properties of these compounds. High frequency conductance measurements in the range of 10 - 105 Hz show that the products with ethylenediamine ligands have a higher electrical conductivity than those with NH3 ligands. The differences in the electrical properties between the compounds studied are mainly caused by chemical composition, structure and morphology.

scholarly journals Formation of 3D graphene foams on soft templated metal monoliths

Nanoscale ◽  
2016 ◽  
Vol 8 (27) ◽  
pp. 13303-13310 ◽  
Author(s):  
Michael K. Tynan ◽  
David W. Johnson ◽  
Ben P. Dobson ◽  
Karl S. Coleman
Keyword(s):  
Electrical Conductivity ◽  
Energy Storage ◽  
Porous Structure ◽  
Electrode Material ◽  
Pollution Control ◽  
High Electrical Conductivity ◽  
Energy Storage Devices ◽  
3D Graphene ◽  
Storage Devices ◽  
Graphene Foams

Graphene foams are leading contenders as frameworks for polymer thermosets, filtration/pollution control and for use as an electrode material in energy storage devices, taking advantage of graphene's high electrical conductivity and the porous structure of the foam.

scholarly journals Investigation of the Electrical Properties of Microtubule Ensembles under Cell-Like Conditions

Nanomaterials ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 265 ◽  
Author(s):  
Aarat P. Kalra ◽  
Sahil D. Patel ◽  
Asadullah F. Bhuiyan ◽  
Jordane Preto ◽  
Kyle G. Scheuer ◽  
...  
Keyword(s):  
Electrical Properties ◽  
Electrical Resistance ◽  
Charge Storage ◽  
Appreciable Effect ◽  
Low Frequencies ◽  
Storage Devices ◽  
Macromolecular Transport ◽  
Chromosomal Segregation ◽  
State Dependent ◽  
Β Tubulin

Microtubules are hollow cylindrical polymers composed of the highly negatively-charged (~23e), high dipole moment (1750 D) protein α, β- tubulin. While the roles of microtubules in chromosomal segregation, macromolecular transport, and cell migration are relatively well-understood, studies on the electrical properties of microtubules have only recently gained strong interest. Here, we show that while microtubules at physiological concentrations increase solution capacitance, free tubulin has no appreciable effect. Further, we observed a decrease in electrical resistance of solution, with charge transport peaking between 20–60 Hz in the presence of microtubules, consistent with recent findings that microtubules exhibit electric oscillations at such low frequencies. We were able to quantify the capacitance and resistance of the microtubules (MT) network at physiological tubulin concentrations to be 1.27 × 10−5 F and 9.74 × 104 Ω. Our results show that in addition to macromolecular transport, microtubules also act as charge storage devices through counterionic condensation across a broad frequency spectrum. We conclude with a hypothesis of an electrically tunable cytoskeleton where the dielectric properties of tubulin are polymerisation-state dependent.

High Electrical Conductivity in Organic Single-Component Systems Based on 2,5-Dimethylthio-TCNQ

1993 ◽  
Vol 328 ◽  
Author(s):  
J. S. Zambounis ◽  
J. Mizuguchi ◽  
H. Hediger ◽  
J. Pfeiffer ◽  
B. Schmidhalter ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Electrical Properties ◽  
Room Temperature ◽  
Single Component ◽  
Charge Carriers ◽  
Optical And Electrical Properties ◽  
High Electrical Conductivity ◽  
Component System ◽  
Component Systems ◽  
Neighboring Molecule

ABSTRACT2,5-dimethylthio-TCNQ has been newly synthesized, and its optical and electrical properties have been investigated in evaporated films. A high electrical conductivity of σ=2× 10−5 Scm−l has been measured at room temperature. The present single-component system is found to contain 2×1017 spins/cm3. The charge carriers are presumably due to incorporated impurities which give the ESR signals. Carrier hopping is considerably facilitated by close intermolecular S-N contacts between the S atom of the -SCH3 group of one molecule and the N atom of -C≡N group of the neighboring Molecule.

scholarly journals Nanostructured conductive polymers for advanced energy storage

2015 ◽  
Vol 44 (19) ◽  
pp. 6684-6696 ◽  
Author(s):  
Ye Shi ◽  
Lele Peng ◽  
Yu Ding ◽  
Yu Zhao ◽  
Guihua Yu
Keyword(s):  
Electrical Conductivity ◽  
Energy Storage ◽  
Mass Transport ◽  
Conductive Polymers ◽  
Research Interest ◽  
High Electrical Conductivity ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Surface Areas ◽  
Considerable Research

Nanostructured conductive polymers (nCPs) have aroused considerable research interest owing to their unique properties over their bulk counterparts, such as high electrical conductivity, large surface areas, and shortened pathways for charge/mass transport. These advantageous features make them promising candidates for applications in energy storage devices.

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