Sputtering of molybdenum and tungsten nano rods and nodules irradiated with 150 eV argon ions

N. M. Ghoniem, Alp Sehirlioglu, Anton L. Neff, Jean Paul Allain, Brian Williams, Reza Sharghi-Moshtaghin

Research output: Contribution to journalArticle

Abstract

Abstract The influence of surface nano architecture on the sputtering and erosion of tungsten and molybdenum is discussed. We present an experimental investigation of the effects of low energy (150 eV) Ar ions on surface sputtering in Mo and W nano-rods and nano-nodules at room temperature. Measurements of the sputtering rate from Mo and W surfaces with nano architecture indicate that the surface topology plays an important role in the mechanism of surface erosion and restructuring. Chemical vapor deposition (CVD) is utilized as a material processing route to fabricate nano-architectures on the surfaces of W and Mo substrates. First, Re dendrites form as needles with cross-sections that have hexagonal symmetry, and are subsequently employed as scaffolding for further deposition of W and Mo to create nano rod surface architecture. The sputtering of surface atoms in these samples shows a marked dependence on their surface architecture. The sputtering rate is shown to decrease at normal ion incidence in all nano-architecture surfaces as compared to planar surfaces. Moreover, and unlike an increase in sputtering of planar crystalline surfaces, the current measurements show a decrease in the net sputtering rate at oblique angles as compared to normal incidence. Energy deposition in the near surface layer shows that W is also amorphized at room temperature by low energy Ar ions to a depth of 5-10 nm.

Original languageEnglish (US)
Article number29470
Pages (from-to)299-308
Number of pages10
JournalApplied Surface Science
Volume331
DOIs
StatePublished - Mar 15 2015
Externally publishedYes

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Edema Disease of Swine
Sputtering
Ions
Acetanilides
Accident Prevention
Psychologic Desensitization
Molybdenum
Tungsten
Erosion
Temperature
Nitrobenzenes
Buccal Administration
Ergothioneine
Accessory Nerve
Traffic Accidents
Arteriovenous Fistula
Chemical vapor deposition
Topology
Atoms
Substrates

Keywords

  • Amorphization
  • Argon ions
  • Ripple instability
  • Sputtering
  • Tungsten

ASJC Scopus subject areas

  • Surfaces, Coatings and Films

Cite this

Ghoniem, N. M., Sehirlioglu, A., Neff, A. L., Allain, J. P., Williams, B., & Sharghi-Moshtaghin, R. (2015). Sputtering of molybdenum and tungsten nano rods and nodules irradiated with 150 eV argon ions. Applied Surface Science, 331, 299-308. [29470]. DOI: 10.1016/j.apsusc.2014.12.201

Sputtering of molybdenum and tungsten nano rods and nodules irradiated with 150 eV argon ions. / Ghoniem, N. M.; Sehirlioglu, Alp; Neff, Anton L.; Allain, Jean Paul; Williams, Brian; Sharghi-Moshtaghin, Reza.

In: Applied Surface Science, Vol. 331, 29470, 15.03.2015, p. 299-308.

Research output: Contribution to journalArticle

Ghoniem, NM, Sehirlioglu, A, Neff, AL, Allain, JP, Williams, B & Sharghi-Moshtaghin, R 2015, 'Sputtering of molybdenum and tungsten nano rods and nodules irradiated with 150 eV argon ions' Applied Surface Science, vol 331, 29470, pp. 299-308. DOI: 10.1016/j.apsusc.2014.12.201
Ghoniem NM, Sehirlioglu A, Neff AL, Allain JP, Williams B, Sharghi-Moshtaghin R. Sputtering of molybdenum and tungsten nano rods and nodules irradiated with 150 eV argon ions. Applied Surface Science. 2015 Mar 15;331:299-308. 29470. Available from, DOI: 10.1016/j.apsusc.2014.12.201

Ghoniem, N. M.; Sehirlioglu, Alp; Neff, Anton L.; Allain, Jean Paul; Williams, Brian; Sharghi-Moshtaghin, Reza / Sputtering of molybdenum and tungsten nano rods and nodules irradiated with 150 eV argon ions.

In: Applied Surface Science, Vol. 331, 29470, 15.03.2015, p. 299-308.

Research output: Contribution to journalArticle

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