Nanostructure formation due to impact of highly charged ions on mica

Ritter, R.; Kowarik, G.; Meissl, W.; El-Said, A.S.; Maunoury, L.; Lebius, H.; Dufour, Christian; Toulemonde, M.; Aumayr, F.

doi:10.1016/j.vacuum.2009.10.018

Cited by 33 publications

(24 citation statements)

References 27 publications

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“…More recently, hillock formation was investigated for even lower potential energies by using slow Ar q+ ions (charge state q = 12, 16) and Xe q+ (q = 23, 27) ions in a kinetic energy range of 150-216 keV. Surprisingly, AFM images recorded in contact mode revealed hillock-like nanostructures on samples irradiated with Xe ions well below the charge state threshold reported earlier [97] (figure 15). Subsequent tapping mode AFM images showed that these structures are not topographic protrusions but rather nanofeatures of modified frictional behavior.…”

Section: Muscovite Micamentioning

confidence: 85%

“…To our knowledge, AFM imaging was only successful in one case where 138 keV Xe 46+ ions were used [112]. Quite recently, we managed to image nanostructures by AFM for all combinations of charge states (Ar q+ , q = 9-16 and Xe q+ , q = 13-30) and kinetic energies (150-480 keV), if the AFM is operated in lateral force mode [114]. For these ions, the impact sites can therefore be interpreted as regions of enhanced friction while there is still no unambiguous indication for topographic protrusions.…”

Section: Highly Oriented Pyrolytic Graphite Hopgmentioning

confidence: 99%

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Single ion induced surface nanostructures: a comparison between slow highly charged and swift heavy ions

Aumayr

Facsko

El-Said

et al. 2011

J. Phys.: Condens. Matter

182

169

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This topical review focuses on recent advances in the understanding of the formation of surface nanostructures, an intriguing phenomenon in ion-surface interaction due to the impact of individual ions. In many solid targets, swift heavy ions produce narrow cylindrical tracks accompanied by the formation of a surface nanostructure. More recently, a similar nanometric surface effect has been revealed for the impact of individual, very slow but highly charged ions. While swift ions transfer their large kinetic energy to the target via ionization and electronic excitation processes (electronic stopping), slow highly charged ions produce surface structures due to potential energy deposited at the top surface layers. Despite the differences in primary excitation, the similarity between the nanostructures is striking and strongly points to a common mechanism related to the energy transfer from the electronic to the lattice system of the target. A comparison of surface structures induced by swift heavy ions and slow highly charged ions provides a valuable insight to better understand the formation mechanisms.

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Section: Muscovite Micamentioning

confidence: 85%

Section: Highly Oriented Pyrolytic Graphite Hopgmentioning

confidence: 99%

Single ion induced surface nanostructures: a comparison between slow highly charged and swift heavy ions

Aumayr

Facsko

El-Said

et al. 2011

J. Phys.: Condens. Matter

182

169

View full text Add to dashboard Cite

show abstract

“…Many studies have found that the nanostructure size depends on the potential energy of HCI [10]. In addition, some investigations have found that the kinetic energy also affects the nanostructure size in samples such as KBr (100) and mica [11,12]. These results imply that the kinetic energy may affect the nanostructure size and even the threshold potential energy for nanostructure formation.…”

Section: Resultsmentioning

confidence: 99%

Modification of HOPG Surface on Irradiation by Highly Charged Ar11+ and Xe26+ Ions Investigated by SEM, ESR, SQUID, and Raman Measurements

Liu

Sakurai

Zhang

et al. 2011

e-J. Surf. Sci. Nanotechnol.

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Highly oriented pyrolytic graphite (HOPG) samples were irradiated by highly charged ions Ar 11+ and Xe 26+. Scanning electron microscopy (SEM), electron spin resonance (ESR), a superconducting quantum interference device (SQUID), and Raman spectroscopy were used to investigate the effect of this irradiation. SEM observations revealed that the contrast between irradiated and unirradiated regions became discernible at a fluence of about 10 14 cm −2. On the other hand, for samples irradiated by Ar + ions, a fluence of the order of 10 15 cm −2 was necessary to obtain a similar contrast to that obtained by Ar 11+ ion irradiation. This demonstrates that highly charged ions effectively enhance modification of solid surfaces. Furthermore, the ESR and SQUID measurements revealed the formation of defects and magnetization of the irradiated surface. Raman measurements were also performed to investigate the structural transformation at different fluences.

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“…In the previous study, no surface modification could be identified for projectile ions below q = 30 [7]. In recent study Ritter et al [29] found that the structures irradiated by Xe 23+ and Xe 27+ ions with mica surfaces are not the result of a true topographic surface modification induced by the ion bombardment, because of the absence of these nanostructures in tapping mode images. In this study, the topographic images are true since they were revealed in a tapping mode and the generated dots are stable and cannot be erased by back and forth scanning.…”

Section: Resultsmentioning

confidence: 84%