Effect of impact angle and projectile size on sputtering efficiency of solid benzene investigated by molecular dynamics simulations

Czerwinski, Bartlomiej; Rzeznik, L.; Paruch, Robert J.; Garrison, Barbara J.; Postawa, Zbigniew

doi:10.1016/j.nimb.2010.12.026

Cited by 35 publications

(72 citation statements)

References 9 publications

(14 reference statements)

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“…This observation is different from the data reported for ion emission and predictions of computer simulations performed at normal incidence on coarse-grained organic systems, where a strong dependence on the projectile size is observed. [10][11][12][13] In this study, we investigate the effect of a projectile size, its kinetic energy and the impact angle on ejection of intact molecules and fragments from an atomistic benzene crystal bombarded by large noble gas cluster projectiles. The results are utilized to explain why simulations performed at normal incidence may not always represent the data obtained with off-normal impact angles.…”

Section: Introductionmentioning

confidence: 99%

Dynamics of large Ar cluster bombardment of organic solids

Postawa

Paruch

Rzeznik

et al. 2012

Surface & Interface Analysis

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Molecular dynamics computer simulations are used to investigate the ejection process of molecules from a benzene crystal bombarded with keV large Ar clusters. The effect of projectile size, the kinetic energy and the impact angle on the sputtering efficiency is investigated. The results show that although the sputtering yield depends on all projectile parameters, this dependence can be greatly simplified if the sputtering yield per projectile nucleon is expressed as a function of projectile kinetic energy per nucleon. A different dependence of the total sputtering yield on the impact angle has been observed for small and large projectiles. This effect is attributed to a 'washing out' mechanism. For large projectiles most of the organic molecules are ejected by gentle collective action of argon atoms. Proper selection of the projectile parameters allows for achieving conditions where only intact molecules are emitted.

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Section: Introductionmentioning

confidence: 99%

Dynamics of large Ar cluster bombardment of organic solids

Postawa

Paruch

Rzeznik

et al. 2012

Surface & Interface Analysis

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“…Additional studies show that the efficiency of the sputtering process strongly depends on the size of the Ar cluster and its impact angle. 110 Small clusters such as Ar 366 behave in a quite similar manner as do C n fullerenes, while for large argon clusters such as Ar 2953 , a nonmonotonic angular dependence is observed with the maximum at ∼45-55 • . 39,111…”

Section: Large Argon Clustersmentioning

confidence: 91%

Cluster SIMS of Organic Materials: Theoretical Insights

Delcorte¹,

Restrepo-Gutiérrez²,

Czerwinski³

2013

Cluster Secondary Ion Mass Spectrometry

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“…For C 60 , experiments show that the yield decreases when going from 40 to 73 incident angle but the more oblique incidence also leads to smaller surface roughness and improved depth profiles. [25] For large Ar clusters (~Ar 2500 ), however, the sputtering yield tends to increase when going from normal to off-normal bombardment, with a maximum around 50 , as shown by computer simulations [24] and experiments. [26] The emission of large polystyrene oligomers (7.5 kDa) from a polymeric substrate by C 60 and organic nanodroplets was recently studied by MD simulations.…”

Section: Sputtering and Energymentioning

confidence: 96%

“…For C 60 and small Ar cluster bombardment (Ar 366 [24] ), the sputtering yield is quite stable from 0 to 40-45 . For C 60 , experiments show that the yield decreases when going from 40 to 73 incident angle but the more oblique incidence also leads to smaller surface roughness and improved depth profiles.…”

Section: Sputtering and Energymentioning

confidence: 99%

Surface sputtering with nanoclusters: the relevant parameters

Delcorte

Restrepo

Czerwinski

et al. 2012

Surface & Interface Analysis

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In this contribution, we compare the results of our recent molecular dynamics simulations with data already published by us and by other authors to identify the relevant physical parameters governing observables such as the range, the damaged volume, the crater shape, the sputtering yield, the emission of molecules and fragments, and the chemical reactions induced in organic solids by cluster projectiles. Among the considered physical quantities, we show for instance that the total cluster energy, the energy per atom/per nucleon in the cluster and, importantly, the mass matching between the cluster and target constituents have a major effect on the physics of the interaction. The evolution of the observables as a function of these basic physical parameters is illustrated and discussed as well as certain implications for organic surface characterization using cluster ion beams.

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Effect of impact angle and projectile size on sputtering efficiency of solid benzene investigated by molecular dynamics simulations

Cited by 35 publications

References 9 publications

Dynamics of large Ar cluster bombardment of organic solids

Dynamics of large Ar cluster bombardment of organic solids

Cluster SIMS of Organic Materials: Theoretical Insights

Surface sputtering with nanoclusters: the relevant parameters

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