Role of the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mi>N</mml:mi><mml:mo>*</mml:mo></mml:msup><mml:mrow><mml:mo>(</mml:mo><mml:mn>2080</mml:mn><mml:mo>)</mml:mo></mml:mrow></mml:mrow></mml:math>in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>p</mml:mi><mml:mi>p</mml:mi><mml:mo>→</mml:mo><mml:mi>p</mml:mi><mml:msup><mml:mi>K</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:mi>Λ</mml:mi><mml:mrow><mml:mo>(</mml:m

Xie, Ju-Jun; Liu, Bochao

doi:10.1103/physrevc.87.045210

Cited by 40 publications

(67 citation statements)

References 52 publications

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“…Finally, we would like to stress that the coupling constant g (1405)KN is important for studying the (1405) resonance in the γp → K + (1405) → K + (π ) reaction and in the pp → pK + (1405) → pK + (π ) reaction by using the effective Lagrangian approach [9,43,44]. More and accurate data for these reactions can be used to improve our knowledge on the structure and properties of the (1405) state, which are, at present, still controversial.…”

Section: Discussionmentioning

confidence: 99%

Coupling constant forΛ(1405)K¯N

Xie

Liu

2013

Phys. Rev. C

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The value of the (1405)KN coupling constant g (1405)KN is obtained by fitting it to the experimental data on the total cross sections of the K − p → π 0 0 reaction. On the basis of an effective Lagrangian approach and isobar model, we show that the value |g (1405)KN | = 1.51 ± 0.10 could be extracted from the available experimental data by assuming that the s-channel (1405) resonance plays a dominant role, whereas, the background contributions from the s-channel (1115), t-channel K * , and u-channel nucleon pole processes are small and can be neglected. However, the u-channel nucleon pole diagram may also give an important contribution in the present calculations. After the background contributions are taken into account, the above value of g (1405)KN is reduced to |g (1405)KN | = 0.77 ± 0.07, which is not supported by the previous calculations and the recent CLAS measurements. The theoretical calculations on differential cross sections are also presented, which can be checked by future experiments.

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Section: Discussionmentioning

confidence: 99%

Coupling constant forΛ(1405)K¯N

Xie

Liu

2013

Phys. Rev. C

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“…They find that the specific terminations have a significant effect on the structural, electronic and electrochemical behaviour of MXene layers. [11][12][13] As a result, there are large discrepancies between the calculated and experimental properties of these materials, particularly for quantities such as their capacity.…”

Section: Introductionmentioning

confidence: 99%

Effect of mixed surface terminations on the structural and electrochemical properties of two-dimensional Ti₃C₂T₂ and V₂CT₂ MXenes multilayers

Caffrey

2018

Nanoscale

173

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MXenes, a family of layered transition metal carbides and nitrides, have shown great promise for use in emerging electrochemical energy storage devices, including batteries and supercapacitors. MXene surfaces are terminated by mixed -O, -F and -OH functional groups as a result of the chemical etching production process. These functional groups are known to be randomly distributed over the surfaces, with limited experimental control over their composition. There is considerable debate regarding the contribution of these functional groups to the properties of the underlying MXene material. For instance, their measured Li or Na capacity is far lower than that predicted by theoretical simulations, which generally assume uniformly terminated surfaces. The extent to which this structural simplification contributes to such discrepancies is unknown. We address this issue by employing first-principles calculations to compare the structural, electronic and electrochemical properties of two common MXenes, namely Ti3C2T2 and V2CT2, with both uniform terminating groups and explicitly mixed terminations. Weighted averages of uniformly-terminated layer properties are found to give excellent approximations to those of more realistic, mixed termination structures. This approximation holds for the lattice parameters, the electronic density of states and the work function. The sodium storage capacity and volume change during sodiation in the interlayer space of these MXenes with mixed surface terminations are also investigated. The redox reaction is shown to be confined to the terminating groups for low concentrations of intercalated Na, with the oxidation state of the metal atoms unaffected until higher concentrations of intercalated Na are achieved. Finally, the average open circuit voltage is shown to be very similar for both Ti3C2T2Na and V2CT2Na with mixed terminations, although it is highly sensitive to the particular composition of the terminating groups.

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“…Modeling is important for the understanding of the structure of MXene. Previous works of the electronic structure of MXenes have mainly been based on density functional theory (DFT) calculations [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Chemical bonding in carbide MXene nanosheets

Magnuson

Halim

Näslund

2018

Journal of Electron Spectroscopy and Related Phenomena

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The chemical bonding in the carbide core and the surface chemistry in a new group of transition-metal carbides Tin+1Cn-Tx (n=1,2) called MXenes have been investigated by surface-sensitive valence band X-ray photoelectron spectroscopy. Changes in band structures of stacked nano sheets of different thicknesses are analyzed in connection to known hybridization regions of TiC and TiO2 that affect elastic and transport properties. By employing high excitation energy, the photoelectron cross-section for the C 2s -Ti 3d hybridization region at the bottom of the valence band is enhanced. As shown in this work, the O 2p and F 2p bands are shown to strongly depend both on the bond lengths to the surface groups and the adsorption sites. The effect of surface oxidation and Ar + sputtering on the electronic structure is also discussed.

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Role of theN*(2080)inpp→pK+Λ(

Cited by 40 publications

References 52 publications

Coupling constant forΛ(1405)K¯N

Coupling constant forΛ(1405)K¯N

Effect of mixed surface terminations on the structural and electrochemical properties of two-dimensional Ti₃C₂T₂ and V₂CT₂ MXenes multilayers

Chemical bonding in carbide MXene nanosheets

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Role of theN*(2080)inpp→pK+Λ(

Cited by 40 publications

References 52 publications

Coupling constant forΛ(1405)K¯N

Coupling constant forΛ(1405)K¯N

Effect of mixed surface terminations on the structural and electrochemical properties of two-dimensional Ti3C2T2 and V2CT2 MXenes multilayers

Chemical bonding in carbide MXene nanosheets

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Product

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Effect of mixed surface terminations on the structural and electrochemical properties of two-dimensional Ti₃C₂T₂ and V₂CT₂ MXenes multilayers