Desorption of large molecules with light-element clusters: Effects of cluster size and substrate nature

Arnaud Delcorte, Barbara Jane Garrison

Research output: Contribution to journalArticle

13 Scopus citations

Abstract

This contribution focuses on the conditions required to desorb a large hydrocarbon molecule using light-element clusters. The test molecule is a 7.5 kDa coil of polystyrene (PS61). Several projectiles are compared, from C 60 to 110 kDa organic droplets and two substrates are used, amorphous polyethylene and mono-crystalline gold. Different aiming points and incidence angles are examined. Under specific conditions, 10 keV nanodrops can desorb PS61 intact from a gold substrate and from a soft polyethylene substrate. The prevalent mechanism for the desorption of intact and 'cold' molecules is one in which the molecules are washed away by the projectile constituents and entrained in their flux, with an emission angle close to ∼70°. The effects of the different parameters on the dynamics and the underlying physics are discussed in detail and the predictions of the model are compared with other published studies.

Original languageEnglish (US)
Pages (from-to)1572-1577
Number of pages6
JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume269
Issue number14
DOIs
StatePublished - Jul 15 2011

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Instrumentation

Fingerprint Dive into the research topics of 'Desorption of large molecules with light-element clusters: Effects of cluster size and substrate nature'. Together they form a unique fingerprint.

  • Cite this