Gas-Phase Synthesis and Control of Structure and Thickness of Graphene Layers on Copper Substrates

Rudskoy, A. I.; Koltsova, Tatiana S.; Larionova, Tatiana; Смирнов, А. Н.; Vasil’eva, E. S.; Nasibulin, Albert G.

doi:10.1007/s11041-016-9962-2

Cited by 24 publications

(12 citation statements)

References 16 publications

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“…To investigate the chemical modification of the CVD monolayer graphene, transferred on Si/SiO 2 substrate and treated by hydrogen (H 2 ) plasma, XPS is used. XPS is very appropriate tool to identify the chemical composition in carbonaceous samples [35][36][37]. The lorentzian-gaussian curve components were extracted by the deconvolution of XPS spectra at the different regions.…”

Section: By Using Strain Equationmentioning

confidence: 99%

Hydrogenated graphene oxide (H-G-SiO₂) Janus structure: experimental and computational study of strong piezo-electricity response

Bidmeshkipour

Alidoosti

Hosseinzadeh

et al. 2020

J. Phys. D: Appl. Phys.

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We have investigated the piezoelectric response of the hydrogenated graphene oxide (H-G-SiO2) stacks both experimentally and theoretically. The piezoresponse force microscopy method and density-functional theory (DFT) calculations were used to study the piezoresponse effect of this structure from both experimental and computational point of views. A mono-layer graphene, made by chemical vapour deposition method, is deposited on Si/SiO2 substrate and its surface is then functionalized with hydrogen atoms. The vertical piezoresponse, observed by piezoresponse force microscopy, is measured to be about 2146 pC N−1, that is comparable to the reported state of the art piezoelectric materials such as relaxor-based ferroelectric single crystals. In order to carry out the DFT modelling, a H-Graphene-O Janus structure has been adopted, where graphene is modified by oxygen atoms adsorbed on one side while hydrogen atoms are placed on the other side. Through modelling by DFT calculations, it is revealed that, by applying out-of-plane compressive uniaxial strain, the structure preforms different piezoelectric behaviours, up to three orders of magnitude alteration by the applied strain. The demonstrated approach for enhancing the piezo-response of graphene paves the way for realizing graphene-based nanoscale sensors, actuators and transducers.

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Section: By Using Strain Equationmentioning

confidence: 99%

Hydrogenated graphene oxide (H-G-SiO₂) Janus structure: experimental and computational study of strong piezo-electricity response

Bidmeshkipour

Alidoosti

Hosseinzadeh

et al. 2020

J. Phys. D: Appl. Phys.

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“…The problem of inaccurate dimensions of the angle of a given part is proposed to be solved with the introduction of an elastic element into the die [20][21][22]. The new method is suitable for different materials with the same angle [7,17]. Figure 2 shows a diagram of a stamp using an elastic element [8,16].…”

Section: Fig 1 -The Definition Of the Spring-back Anglementioning

confidence: 99%

Improving the Quality of Parts Produced by Bending in a Die with an Elastic Element

Nesterenko

Volgushev

Frese³

2019

KEM

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The process of less than 90 degrees angle bending is presented in this article. Elastic-plastic deformation took place in the sample. After removing the force, the effect of elastic spring-back occurs – the angle of the part is increased by a value that depends on many parameters. The usage of an elastic element in the stamp allows us to change the angle of spring-back. This is happened doe to adjusting the height of the press stroke. This allows us to produce parts with accurate dimensions.

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“…Thus, the internal parameters of the sequential forming pattern of the skin-tightness are the kinematic angular values associated with the angle of coverage of the tightening punch and with the angle of extension of the shell between the operations of the hanging (Rudskoy et al, 2016a;Rudskoy et al, 2016b;. The choice of angular parameter values is realized due to the understanding of several reasons:…”

Section: Introductionmentioning

confidence: 99%

The System of Informational Choice of the Kinematic Scheme for the Formation of Shells of a Complex Spatial Form

Mikheev¹,

Grechnikova²,

Roslyakov³

et al. 2019

Int J Math, Eng, Manag Sci

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Three kinematic schemes are studied, which differ from one another in the route of technological operations. Each of these kinematic schemes has its own set of power stages of shaping and stages of free bending or bending of the ends of the sheet blank. In addition, the quantitative values of the angular parameters of a particular kinematic scheme are determined. Numerical experiments have been carried out, which give complete information about the distribution of the shell thickness as discrete values in one or another element. The result is statistical processing of this information, the scope of the predicted values and comparison with the tolerance on the thickness of the peel used in aviation enterprises.

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Gas-Phase Synthesis and Control of Structure and Thickness of Graphene Layers on Copper Substrates

Cited by 24 publications

References 16 publications

Hydrogenated graphene oxide (H-G-SiO₂) Janus structure: experimental and computational study of strong piezo-electricity response

Hydrogenated graphene oxide (H-G-SiO₂) Janus structure: experimental and computational study of strong piezo-electricity response

Improving the Quality of Parts Produced by Bending in a Die with an Elastic Element

The System of Informational Choice of the Kinematic Scheme for the Formation of Shells of a Complex Spatial Form

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Gas-Phase Synthesis and Control of Structure and Thickness of Graphene Layers on Copper Substrates

Cited by 24 publications

References 16 publications

Hydrogenated graphene oxide (H-G-SiO2) Janus structure: experimental and computational study of strong piezo-electricity response

Hydrogenated graphene oxide (H-G-SiO2) Janus structure: experimental and computational study of strong piezo-electricity response

Improving the Quality of Parts Produced by Bending in a Die with an Elastic Element

The System of Informational Choice of the Kinematic Scheme for the Formation of Shells of a Complex Spatial Form

Contact Info

Product

Resources

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Hydrogenated graphene oxide (H-G-SiO₂) Janus structure: experimental and computational study of strong piezo-electricity response

Hydrogenated graphene oxide (H-G-SiO₂) Janus structure: experimental and computational study of strong piezo-electricity response