Desorption of organic overlayers by Ga and C60 bombardment

B. Czerwiński, R. Samson, Barbara Jane Garrison, Nicholas Winograd, Z. Postawa

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

This paper reviews our recent work on computer simulations of Ga and C60 bombardment of thin organic overlayers deposited on metal substrate. A multilayer of benzene, a monolayer of PS4 on Ag{1 1 1} and a self-assembled monolayer of octanethiol molecules on Au{1 1 1} were irradiated with 15 keV monoatomic (Ga) and polyatomic (C60) projectiles that are recognized as valuable sources for desorption of high mass particles in secondary ion and neutral mass spectrometry (SIMS/SNMS) experiments. The results indicate that the sputtering yield decreases with the increase of the binding energy and the average kinetic energy of parent molecules is shifted toward higher kinetic energy. Although the total sputtering yield of organic material is larger for 15 keV C60, the impact of this projectile leads to a significant fragmentation of ejected species. As a result, the yield of the intact molecules is comparable for C60 and Ga projectiles. Our results indicate that the chemical analysis of thin organic films performed by detection of sputtered neutrals will not benefit from the use of C60 projectiles.

Original languageEnglish (US)
Pages (from-to)167-173
Number of pages7
JournalVacuum
Volume81
Issue number2
DOIs
StatePublished - Sep 20 2006

Fingerprint

Projectiles
bombardment
projectiles
Desorption
desorption
Kinetic energy
Molecules
Sputtering
kinetic energy
sputtering
molecules
particle mass
Self assembled monolayers
Secondary ion mass spectrometry
organic materials
Benzene
Binding energy
chemical analysis
secondary ion mass spectrometry
Mass spectrometry

All Science Journal Classification (ASJC) codes

  • Surfaces, Coatings and Films
  • Condensed Matter Physics
  • Surfaces and Interfaces

Cite this

Czerwiński, B., Samson, R., Garrison, B. J., Winograd, N., & Postawa, Z. (2006). Desorption of organic overlayers by Ga and C60 bombardment. Vacuum, 81(2), 167-173. https://doi.org/10.1016/j.vacuum.2006.03.012
Czerwiński, B. ; Samson, R. ; Garrison, Barbara Jane ; Winograd, Nicholas ; Postawa, Z. / Desorption of organic overlayers by Ga and C60 bombardment. In: Vacuum. 2006 ; Vol. 81, No. 2. pp. 167-173.
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Czerwiński, B, Samson, R, Garrison, BJ, Winograd, N & Postawa, Z 2006, 'Desorption of organic overlayers by Ga and C60 bombardment', Vacuum, vol. 81, no. 2, pp. 167-173. https://doi.org/10.1016/j.vacuum.2006.03.012

Desorption of organic overlayers by Ga and C60 bombardment. / Czerwiński, B.; Samson, R.; Garrison, Barbara Jane; Winograd, Nicholas; Postawa, Z.

In: Vacuum, Vol. 81, No. 2, 20.09.2006, p. 167-173.

Research output: Contribution to journalArticle

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Czerwiński B, Samson R, Garrison BJ, Winograd N, Postawa Z. Desorption of organic overlayers by Ga and C60 bombardment. Vacuum. 2006 Sep 20;81(2):167-173. https://doi.org/10.1016/j.vacuum.2006.03.012