Creation of surface nanostructures in lanthanum fluoride single crystals by irradiation with slow highly charged ions

A. S. El-Said; R. A. Wilhelm; R. Heller; S. Facsko

doi:10.1016/j.nimb.2019.01.007

Creation of surface nanostructures in lanthanum fluoride single crystals by irradiation with slow highly charged ions

A. S. El-Said^*, R. A. Wilhelm, R. Heller, S. Facsko

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

Slow highly charged ions (HCI) were utilized successfully for the formation of various nanostructures in the surfaces of different materials. The creation mechanism of HCI-induced nanostructures was intensively studied in alkali- and alkaline-earth fluorides. Here, we are investigating another type of fluorine-containing ionic crystals of different crystalline and electronic structure, namely lanthanum fluoride, LaF₃. The single crystals were irradiated with slow (eV-keV) highly charged xenon ions from an Electron Beam Ion Trap. After irradiation, the crystals surfaces were investigated by scanning force microscopy. The measured topographic images show nanohillocks emerging from the surface. These nanostructures were observed only after exceeding a well-defined threshold in the potential energy. The role of ion parameters for nanohillocks formation as well as a comparison with results for swift heavy ion irradiations of LaF₃ single crystals are presented. Furthermore, the similarities and differences between LaF₃ and other ionic fluoride crystals, in the creation of surface nanostructures, are discussed.

Original language	English
Pages (from-to)	137-140
Number of pages	4
Journal	Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume	460
DOIs	https://doi.org/10.1016/j.nimb.2019.01.007
State	Published - 1 Dec 2019

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Publisher Copyright:
© 2019 Elsevier B.V.

Keywords

Highly charged ions
LaF
Nanostructures

ASJC Scopus subject areas

Nuclear and High Energy Physics
Instrumentation

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10.1016/j.nimb.2019.01.007

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title = "Creation of surface nanostructures in lanthanum fluoride single crystals by irradiation with slow highly charged ions",

abstract = "Slow highly charged ions (HCI) were utilized successfully for the formation of various nanostructures in the surfaces of different materials. The creation mechanism of HCI-induced nanostructures was intensively studied in alkali- and alkaline-earth fluorides. Here, we are investigating another type of fluorine-containing ionic crystals of different crystalline and electronic structure, namely lanthanum fluoride, LaF3. The single crystals were irradiated with slow (eV-keV) highly charged xenon ions from an Electron Beam Ion Trap. After irradiation, the crystals surfaces were investigated by scanning force microscopy. The measured topographic images show nanohillocks emerging from the surface. These nanostructures were observed only after exceeding a well-defined threshold in the potential energy. The role of ion parameters for nanohillocks formation as well as a comparison with results for swift heavy ion irradiations of LaF3 single crystals are presented. Furthermore, the similarities and differences between LaF3 and other ionic fluoride crystals, in the creation of surface nanostructures, are discussed.",

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doi = "10.1016/j.nimb.2019.01.007",

language = "English",

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Creation of surface nanostructures in lanthanum fluoride single crystals by irradiation with slow highly charged ions. / El-Said, A. S.; Wilhelm, R. A.; Heller, R. et al.
In: Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, Vol. 460, 01.12.2019, p. 137-140.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - Creation of surface nanostructures in lanthanum fluoride single crystals by irradiation with slow highly charged ions

AU - El-Said, A. S.

AU - Wilhelm, R. A.

AU - Heller, R.

AU - Facsko, S.

PY - 2019/12/1

Y1 - 2019/12/1

N2 - Slow highly charged ions (HCI) were utilized successfully for the formation of various nanostructures in the surfaces of different materials. The creation mechanism of HCI-induced nanostructures was intensively studied in alkali- and alkaline-earth fluorides. Here, we are investigating another type of fluorine-containing ionic crystals of different crystalline and electronic structure, namely lanthanum fluoride, LaF3. The single crystals were irradiated with slow (eV-keV) highly charged xenon ions from an Electron Beam Ion Trap. After irradiation, the crystals surfaces were investigated by scanning force microscopy. The measured topographic images show nanohillocks emerging from the surface. These nanostructures were observed only after exceeding a well-defined threshold in the potential energy. The role of ion parameters for nanohillocks formation as well as a comparison with results for swift heavy ion irradiations of LaF3 single crystals are presented. Furthermore, the similarities and differences between LaF3 and other ionic fluoride crystals, in the creation of surface nanostructures, are discussed.

AB - Slow highly charged ions (HCI) were utilized successfully for the formation of various nanostructures in the surfaces of different materials. The creation mechanism of HCI-induced nanostructures was intensively studied in alkali- and alkaline-earth fluorides. Here, we are investigating another type of fluorine-containing ionic crystals of different crystalline and electronic structure, namely lanthanum fluoride, LaF3. The single crystals were irradiated with slow (eV-keV) highly charged xenon ions from an Electron Beam Ion Trap. After irradiation, the crystals surfaces were investigated by scanning force microscopy. The measured topographic images show nanohillocks emerging from the surface. These nanostructures were observed only after exceeding a well-defined threshold in the potential energy. The role of ion parameters for nanohillocks formation as well as a comparison with results for swift heavy ion irradiations of LaF3 single crystals are presented. Furthermore, the similarities and differences between LaF3 and other ionic fluoride crystals, in the creation of surface nanostructures, are discussed.

KW - Highly charged ions

KW - LaF

KW - Nanostructures

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DO - 10.1016/j.nimb.2019.01.007

M3 - Article

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JO - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms

JF - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms

ER -

Creation of surface nanostructures in lanthanum fluoride single crystals by irradiation with slow highly charged ions

Abstract

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Keywords

ASJC Scopus subject areas

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