Energy loss and angular distributions of gold cluster constituents

Bouneau, S.; Brunelle, Alain; Della‐Negra, S.; Depauw, J.; Jacquet, D.; Beyec, Y. Le; Новиков, А. В.; Pautrat, M.; Andersen, H. H.

doi:10.1016/j.nimb.2006.08.001

Cited by 4 publications

(5 citation statements)

References 15 publications

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“…This effect is not observed for polyatomic ions with up to seven atoms 13 but is observed in simulations of 13 atoms 14 . The effect also seems to disappear for projectiles with >200 keV/atom 15 . The morphological observations and molecular dynamic simulations indicate an energy deposition process in a hydrodynamic flow 16 .…”

Section: Introductionmentioning

confidence: 92%

“…14 The effect also seems to disappear for projectiles with >200 keV/atom. 15 The morphological observations and molecular dynamic simulations indicate an energy deposition process in a hydrodynamic flow. 16 A distinct characteristic of the massive cluster solid impact is the extreme energy density and pressure transient.…”

Section: Introductionmentioning

confidence: 96%

“…It has long been recognized that the impact of hypervelocity massive clusters on solids differs in the resultant dynamics from those occurring for atomic or small cluster ions of comparable velocities. − Yet, little is known about this impact regime, beyond observations of impact craters/holes and reports of abundant secondary ion (SI) emission. − Visualization of impacts of individual massive clusters, e.g., 100 water molecule ions or Au n + q (100 ≤ n ≤ 1000; q = 1–10) at velocities of 10 to 100 km/s on thin carbon films shows craters of size and depth roughly correlated with the projectile size and energy. − Remarkably, their range significantly exceeds that of equal velocity atomic ions, a feature attributed to the clearing-the-way effect. , This effect is not observed for polyatomic ions with up to seven atoms but is observed in simulations of 13 atoms . The effect also seems to disappear for projectiles with >200 keV/atom . The morphological observations and molecular dynamic simulations indicate an energy deposition process in a hydrodynamic flow .…”

Section: Introductionmentioning

confidence: 99%

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Bidirectional Ion Emission from Massive Gold Cluster Impacts on Nanometric Carbon Foils

et al. 2012

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Carbon cluster emission from thin carbon foils (5–40 nm) impacted by individual Aun+q cluster projectiles (95–125 qkeV, n/q = 3–200) reveals features regarding the energy deposition, projectile range, and projectile fate in matter as a function of the projectile characteristics. For the first time, the secondary ion emission from thin foils has been monitored simultaneously in both forward and backward emission directions. The projectile range and depth of emission were examined as a function of projectile size, energy, and target thickness. A key finding is that the massive cluster impact develops very differently from that of a small polyatomic projectile. The range of the 125 qkeV Au100q+q (q ≈ 4) projectile is estimated to be 20 nm (well beyond the range of an equal velocity Au+) and projectile disintegration occurs at the exit of even a 5 nm thick foil.

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Section: Introductionmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

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Bidirectional Ion Emission from Massive Gold Cluster Impacts on Nanometric Carbon Foils

et al. 2012

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“…Gold cluster behaves as a group of n independent Au atoms, with respect to the energy loss and straggling processes. 29 Assuming that this result still holds for 30keV/atom Au 4þ 400, we used SRIM calculations 30 to calculate the energy deposition in the solid. The estimated deposited energy in PMMA reaches 12 MeV along about 40 nm in depth with a small lateral scattering dimension close to 20 nm.…”

Section: B Volume Of Emissionmentioning

confidence: 99%

Enhanced sputter and secondary ion yields using MeV gold nanoparticle beams delivered by the Andromede facility

Lai

Jacquet

Ribaud

et al. 2020

Journal of Vacuum Science &Amp; Technology B, Nanotechnology and Microelectronics: Materials, Processing, Measurement, and Phen

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Andromede is a new instrument for mass spectrometry analysis of nanodomains and nano-objects present on a surface. The molecular sample information (mass and structure) is obtained from time-of-flight spectra of secondary ions emitted under the impact of nanoparticles (NPs), as Au q þ n with n/q up to 200 accelerated by a 4 MV single stage electrostatic Pelletron® accelerator. Such projectiles, providing huge emission rates per impact, permit the topographic analysis of complex samples. The energy deposition of these massive gold NPs induces surprisingly large holes of about 100 nm diameter in very thin graphene foils and average sputtered volume per impact of about 10 6 nm 3 in a thick polymer material. The use of such massive clusters associated with multianode detectors, allowing the simultaneous detection of several ions of a given mass, permits correlation studies between the emitted ions within a single impact, shedding additional light on the chemical composition and structure of the analysed sample as illustrated here for various samples from metallic surfaces to biologic molecules deposits.

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“…The influence of the projectile mass and energy is being studied in order to investigate this new hydrodynamic regime of the solid–particle interaction. In the field of cluster impact, our experiment and its analysis will allow to delimit the transition region from conditions where the cluster constituents interact independently (with or without overlapping of their collision cascades)7 and those where hot spikes due to hydrodynamic effects dominate 6. This study also aims to find the best energy for the development of new time of flight mass spectrometry (ToFMS) methods involving massive cluster beams to microanalyze surfaces with increased yields.…”

Section: Introductionmentioning

confidence: 99%

Massive clusters: Secondary emission from qkeV to qMeV. New emission processes? New SIMS probe?

Della‐Negra¹,

Depauw²,

Guillermier³

et al. 2011

Surface & Interface Analysis

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We report on the secondary ion emission under massive cluster (from 100 to 1600 atoms) impacts from different organic samples. The study has been preformed at the Orsay Tandem Accelerator equipped with a Liquid Metal Ion Source (LMIS) using a time of flight (ToF) mass spectrometer (MS) with a multianode localization detector. The influence of the projectile mass and energy is studied in order to investigate the new hydrodynamic regime of the solid-particle interaction related to the use of these massive clusters. We shall present this study, the energy range of which extends from 10 qkeV up to 4 qMeV. The results show that the ionic emission intensities increase with the energy and the mass of the projectiles (from n/q = 25 to n/q = 400) which allows the simultaneous emission of a few tens ions of the same mass per impact, what had never before been observed in SIMS. The study of the positive ionic emission is surprising. There is an important emission (also a few tens ions) of H + , H 2 + , H 3 + and C + . The setup permits to determine the angular velocity distributions of the ejected ions. We present the results which permit to distinguish four classes of ionic emission. The molecular ions and molecular clusters are preferentially pushed from the surface by a pressure wave which rises perpendicularly to the beam trajectory.

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Energy loss and angular distributions of gold cluster constituents

Cited by 4 publications

References 15 publications

Bidirectional Ion Emission from Massive Gold Cluster Impacts on Nanometric Carbon Foils

Bidirectional Ion Emission from Massive Gold Cluster Impacts on Nanometric Carbon Foils

Enhanced sputter and secondary ion yields using MeV gold nanoparticle beams delivered by the Andromede facility

Massive clusters: Secondary emission from qkeV to qMeV. New emission processes? New SIMS probe?

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