The description of charge transfer in fast negative ions scattering on water covered Si(100) surfaces

Chen, Lin; Qiu, Shunli; Liu, Pinyang; Xiong, Feifei; Lu, Jianjie; Liu, Yuefeng; Liu, Yiran; Ren, Fei; Xiao, Yunqing; Gao, Lei; Zhao, Qiushuang; Ding, Bin; Li, Yuan; Guo, Yanling; Chen, Ximeng

doi:10.1016/j.apsusc.2016.06.132

Cited by 12 publications

(5 citation statements)

References 72 publications

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“…As discussed in our previous papers, , the efficient positive-ion production demonstrates that the initial outgoing particles are not fully composed of negative ions. Moreover, the incident energies are so high that charge transfer has not achieved the equilibrium population.…”

Section: Resultsmentioning

confidence: 72%

“…We are not equipped with a Kelvin probe, so we cannot measure the surface work function directly. To reveal the work function effect, we have performed the calculation based on the modified rate equation that worked very well in our previous work. , …”

Section: Resultsmentioning

confidence: 99%

“…The widths used in our calculation are Γ ⊥ ( z ) = 12 exp[−0.96( z + 0.716)] and Γ ∥ ( z ) = 2.9 exp[−1.05( z + 0.716)] that are obtained from the literature . We used a typical value of 3 atomic unit for the starting point z 0 of the integration, which is the same as that used in our previous paper …”

Section: Resultsmentioning

confidence: 99%

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Dissociation and Charge Transfer of H₂O on Cu(110) Probed in Real Time Using Ion Scattering Spectroscopy

Chen

Liu

et al. 2016

Langmuir

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Water-Cu(110) interaction is of particular importance during the routine use of graphene-based devices. In this work, water adsorption, dissociation, and desorption at elevated temperatures have been well studied using the time-of-flight ion scattering technique. It is found that water adsorption meets the first-order Langmuir adsorption model at room temperature. The variation of the ratio between residual O and H on the surface with temperature has been well determined, which profoundly reveals the dynamical process of surface composition. Furthermore, the change in the surface electronic properties has been probed by measuring negative-ion fractions as a function of the annealing temperature for fast ion scattering. It suggests that charge transfer is a very sensitive method for studying specific electronic processes in real time.

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Section: Resultsmentioning

confidence: 72%

Section: Resultsmentioning

confidence: 99%

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Dissociation and Charge Transfer of H₂O on Cu(110) Probed in Real Time Using Ion Scattering Spectroscopy

Chen

Liu

et al. 2016

Langmuir

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“…In our previous study, the bell shape of the negative-ion fraction as a function of exit angle was observed for O – and C – ions scattered from HOPG at a scattering angle of 38° . Moreover, the bell-shaped negative-ion fraction has also been found on semiconductor surfaces and metal surfaces. ,, Of course, it should be kept in mind that the scattering angle of 8° in this work is different from those studies with a scattering angle of 38°, so that a direct comparison between them is not possible.…”

Section: Resultsmentioning

confidence: 72%

“…34 Moreover, the bell-shaped negative-ion fraction has also been found on semiconductor surfaces and metal surfaces. 39,46,47 Of course, it should be kept in mind that the scattering angle of 8°in this work is different from those studies with a scattering angle of 38°, so that a direct comparison between them is not possible.…”

Section: Resultsmentioning

confidence: 96%

Unexpected Negative-Ion Conversion in Grazing Scattering of Negative Ions on HOPG

et al. 2021

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An experimental study of 8.5–22.5 keV-energy C–, O–, and F– ion scattering from an HOPG surface has been performed at a grazing scattering angle. For a given incident angle or impact velocity, the F– fraction is the highest and the C– fraction is the smallest among these three projectiles, which is explained with the order of the electron affinity level of the projectile. Moreover, the unexpected observations are that the F– ion fraction increases monotonically with impact velocity and that the negative-ion fraction increases with the decrease in exit angle. It can be explained by the influence of the effective high work function of HOPG and the production of positive ions at short distances from the surface.

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Catalytic generation of negative ions at metal surfaces with water adlayers

et al. 2019

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The description of charge transfer in fast negative ions scattering on water covered Si(100) surfaces

Cited by 12 publications

References 72 publications

Dissociation and Charge Transfer of H₂O on Cu(110) Probed in Real Time Using Ion Scattering Spectroscopy

Dissociation and Charge Transfer of H₂O on Cu(110) Probed in Real Time Using Ion Scattering Spectroscopy

Unexpected Negative-Ion Conversion in Grazing Scattering of Negative Ions on HOPG

Catalytic generation of negative ions at metal surfaces with water adlayers

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The description of charge transfer in fast negative ions scattering on water covered Si(100) surfaces

Cited by 12 publications

References 72 publications

Dissociation and Charge Transfer of H2O on Cu(110) Probed in Real Time Using Ion Scattering Spectroscopy

Dissociation and Charge Transfer of H2O on Cu(110) Probed in Real Time Using Ion Scattering Spectroscopy

Unexpected Negative-Ion Conversion in Grazing Scattering of Negative Ions on HOPG

Catalytic generation of negative ions at metal surfaces with water adlayers

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Product

Resources

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Dissociation and Charge Transfer of H₂O on Cu(110) Probed in Real Time Using Ion Scattering Spectroscopy

Dissociation and Charge Transfer of H₂O on Cu(110) Probed in Real Time Using Ion Scattering Spectroscopy