The expansion of the carbon-carbon bond length in potassium graphites

Nixon, D E; Parry, G.

doi:10.1088/0022-3719/2/10/305

Cited by 133 publications

(72 citation statements)

References 10 publications

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“…The in-plane arrangement in the graphene planes is similar as in pristine graphite with just tiny deviations to the in-plane lattice constant a = 2.46Å and a nearestneighbor carbon-carbon distance of ∼ 1.42Å. The small in-plane lattice expansion due to intercalation in GICs has been explained by Nixon and Parry [26]. The C-C distance change is given by a linear approximation dependent on the reciprocal stage (1/n) as it is shown in Fig.…”

Section: Feature Articlementioning

confidence: 55%

“…In Ref. [24] the noticeable down-shift was shown to stem from a lattice expansion (strain) of the graphene layers in GICs that head been measured in the early days of GIC research by Nixon and Parry [26] (see Fig. 5).…”

Section: Raman Study Of Charge Transfer and Strain In Highly Staged Gmentioning

confidence: 90%

“…2b-d). For stages higher than III Solin and Nemanich observed in K-GICs the presence of two G-line components, one close to pristine graphite and one blueshifted [26], which change in intensity as function of stage. On the other hand, for stage II a single nearly symmetric Lorentzian line around 1600 cm −1 and for stage I a clear strongly broadened and red shifted Fano line-shape independent from the intercalant and a characteristic z-axis C z mode are observed (see Fig.…”

Section: Feature Articlementioning

confidence: 95%

“…A secondary effect of charge transfer in GICs is the splitting of the G-line in two when the stage index n ≥ 3 [26]. The G-line in stages III-VI shows a high frequency and a low frequency mode [2,24].…”

Section: Raman Study Of Charge Transfer and Strain In Highly Staged Gmentioning

confidence: 99%

“…(4). The carbon-bond lengths were taken from the experiments by Nixon and Parry [26]. DFT is known to be problematic in the calculation of charge-transfer processes.…”

Section: Raman Study Of Charge Transfer and Strain In Highly Staged Gmentioning

confidence: 99%

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Raman spectroscopy of graphite intercalation compounds: Charge transfer, strain, and electron–phonon coupling in graphene layers

Chacón-Torres

Wirtz

Pichler

2014

Physica Status Solidi (b)

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Graphite intercalation compounds (GICs) are an interesting and highly studied field since 1970's. It has gained renewed interest since the discovery of superconductivity at high temperature for CaC 6 and the rise of graphene. Intercalation is a technique used to introduce atoms or molecules into the structure of a host material. Intercalation of alkali metals in graphite has shown to be a controllable procedure recently used as a scalable technique for bulk production of graphene, and nano-ribbons by induced exfoliation of graphite. It also creates supra-molecular interactions between the host and the intercalant, inducing changes in the electronic, mechanical, and physical properties of the host. GICs are the mother system of intercalation also employed in fullerenes, carbon nanotubes, graphene, and carbon-composites. We will show how a combination of Raman and ab-initio calculations of the density and the electronic band structure in GICs can serve as a tool to elucidate the electronic structure, electron-phonon coupling, charge transfer, and lattice parameters of GICs and the graphene layers within. This knowledge of GICs is of high importance to understand superconductivity and to set the basis for applications with GICs, graphene and other nano-carbon based materials like nanocomposites in batteries and nanoelectronic devices.

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Section: Feature Articlementioning

confidence: 55%

Section: Raman Study Of Charge Transfer and Strain In Highly Staged Gmentioning

confidence: 90%

Section: Feature Articlementioning

confidence: 95%

Section: Raman Study Of Charge Transfer and Strain In Highly Staged Gmentioning

confidence: 99%

“…(4). The carbon-bond lengths were taken from the experiments by Nixon and Parry [26]. DFT is known to be problematic in the calculation of charge-transfer processes.…”

Section: Raman Study Of Charge Transfer and Strain In Highly Staged Gmentioning

confidence: 99%

See 3 more Smart Citations

Raman spectroscopy of graphite intercalation compounds: Charge transfer, strain, and electron–phonon coupling in graphene layers

Chacón-Torres

Wirtz

Pichler

2014

Physica Status Solidi (b)

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The Nature and Structural Properties of Graphite Intercalation Compounds

Solin

1982

Advances in Chemical Physics

207

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Electromechanical Actuators Based on Graphene and Graphene/Fe₃O₄ Hybrid Paper

Liang

Huang

et al. 2011

Adv Funct Materials

176

123

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Exceptionally high specific surface area, mechanical strength, electrical conductivity, and a special two‐dimensional structure make graphene a highly promising material for electromechanical actuators. Electromechanical actuators are fabricated using flexible graphene‐based paper prepared via a filtration process, and the stroke of these graphene‐based actuators is directly measured during electrochemical double‐layer charge injection. Actuation strain up to 0.064% was obtained for pristine graphene paper in response to an applied potential of –1 V in 1 M NaCl solution. Double‐layer charge injection in graphene sheets is believed to induce actuation strain through a combination of coulombic and quantum‐chemical‐based expansion. To increase electrochemical‐double‐layer capacitance and actuator performance, Fe3O4 nanoparticles were used to partially prevent graphene sheets from restacking and allow the electrolyte ions to infiltrate the resulting magnetic graphene paper more easily. The magnetic graphene paper exhibits actuation strain as large as 0.1% at –1 V applied potential, which is about 56% higher than that of the pristine graphene paper.

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The expansion of the carbon-carbon bond length in potassium graphites

Cited by 133 publications

References 10 publications

Raman spectroscopy of graphite intercalation compounds: Charge transfer, strain, and electron–phonon coupling in graphene layers

Raman spectroscopy of graphite intercalation compounds: Charge transfer, strain, and electron–phonon coupling in graphene layers

The Nature and Structural Properties of Graphite Intercalation Compounds

Electromechanical Actuators Based on Graphene and Graphene/Fe₃O₄ Hybrid Paper

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The expansion of the carbon-carbon bond length in potassium graphites

Cited by 133 publications

References 10 publications

Raman spectroscopy of graphite intercalation compounds: Charge transfer, strain, and electron–phonon coupling in graphene layers

Raman spectroscopy of graphite intercalation compounds: Charge transfer, strain, and electron–phonon coupling in graphene layers

The Nature and Structural Properties of Graphite Intercalation Compounds

Electromechanical Actuators Based on Graphene and Graphene/Fe3O4 Hybrid Paper

Contact Info

Product

Resources

About

Electromechanical Actuators Based on Graphene and Graphene/Fe₃O₄ Hybrid Paper