Isotope dependence of chemical erosion of carbon

Reinhold, C. O.; Krstić, Predrag; Stuart, Steven J.; Zhang, Hengda; Harris, Peter R; Meyer, F. W.

doi:10.1016/j.jnucmat.2010.03.012

Cited by 10 publications

(3 citation statements)

References 37 publications

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“…at or below the physical sputtering threshold where chemical sputtering dominates, we see an average difference between H + and D + induced total C yields of a factor in the range 8-11. Recently published MD simulations comparing such species found an isotope effect magnitude in the total C production yields closer to a factor of $2-3 [7], although the simulations were restricted to energies below 20 eV/D or H, i.e. well below the present experimental energy range.…”

Section: Discussionmentioning

confidence: 53%

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Molecular size effect in the chemical sputtering of a-C:H thin films by low energy H+, , and ions

Harris

Meyer

Jacob

et al. 2011

Nuclear Instruments and Methods in Physics Research Section B:

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a b s t r a c tWe have experimentally determined total carbon yields per incident H atom in the energy range 36-300 eV/H for H + , H þ 2 , and H þ 3 projectiles incident normally on $60 nm thick a-C:H films, using 2-D ellipsometry determination of erosion crater volumes ex vacuo, the separately characterized thin film carbon density, and the incident beam current integration accumulated on target during the crater evolution. During each beam exposure, methane production was monitored using in situ quadrupole mass spectrometry (QMS). The present total carbon yields/H for incident H þ 3 ions obtained via ellipsometry are in agreement with total mass loss measurements for H þ 3 by Balden and Roth [1] over the investigated energy range. The observed methane production per incident H for the molecular ions exhibits molecular size effects over the entire energy range investigated, confirming the trend observed in the ellipsometrybased total C yields/H.

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Section: Discussionmentioning

confidence: 53%

“…To facilitate assessment for heavier H isotopes the present measurements and those of [5] are compared with recent molecular dynamics calculations by Reinhold et al [7].…”

Section: Introductionmentioning

confidence: 99%

Molecular size effect in the chemical sputtering of a-C:H thin films by low energy H+, , and ions

Harris

Meyer

Jacob

et al. 2011

Nuclear Instruments and Methods in Physics Research Section B:

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“…The calculations show a transition from graphitelike hybridization to a mixture of diamondlike and linear hybridizations with dose. H) [10][11][12] or by cumulative deposition of low-energy particles on C surfaces, often preloaded with some amount of H. 13 Substrates resulting from the former method, termed unsaturated, have been shown to possibly underestimate the amount of C sputtering under H/D irradiation tests. V C 2011 American Institute of Physics.…”

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confidence: 99%

Generation of an amorphous graphite substrate by cumulative deuterium bombardment using molecular dynamics with full nonbonded interactions

Marian¹

2011

Journal of Applied Physics

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A deuterated amorphous carbon target is generated from a fresh graphite layer via hyperthermal irradiation with deuterium ions using molecular dynamics (MD) simulations. We use interatomic potentials that include nonbonded (long-range) interactions for maximum accuracy and simulate cumulative bombardment up to doses of 5.80 Â 10 16 ions cm À2 at 1000 K. The graphite target goes through several stages of erosion and swelling, leading to complete amorphization and significant density loss. The calculations show a transition from graphitelike hybridization to a mixture of diamondlike and linear hybridizations with dose. It is concluded that the current sample sizes obtained directly by cumulative irradiation affordable with MD are not sufficiently large to be used for sputtering calculations under steady-state conditions.

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In situ X-ray observation and simulation of ratcheting-fatigue interactions in solder joints

Shi

Mei

Chen

et al. 2016

Electron. Mater. Lett.

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Isotope dependence of chemical erosion of carbon

Cited by 10 publications

References 37 publications

Molecular size effect in the chemical sputtering of a-C:H thin films by low energy H+, , and ions

Molecular size effect in the chemical sputtering of a-C:H thin films by low energy H+, , and ions

Generation of an amorphous graphite substrate by cumulative deuterium bombardment using molecular dynamics with full nonbonded interactions

In situ X-ray observation and simulation of ratcheting-fatigue interactions in solder joints

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