Scaling law for the ion-induced electronic sputtering of intact biomolecules

Evidence of thermal activation

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8 Citations (Scopus)

Abstract

A linear scaling is found for intact biomolecules in the form of in the formof 1n(Y/Se)-1/Se where Y, and Se are the sputtering yield and the electronic stopping power, respectively. The law is in good agreement with the experimental data for valine, leucine, and insulin molecules in various charge states in a broad range of Se. The thermal spike model of the author is applied and the activation energies of desorption U are obtained from the slope of the semilogarithmic lines. U is considerably higher for neutral leucine molecules than for ions. The Coulomb contribution to U for molecular ions does not depend on Se in a broad range. During sputtering, the specific heat is approximately 10% of its room temperature value for valine and leucine.

Original languageEnglish
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume70
Issue number9
DOIs
Publication statusPublished - Sep 2004

Fingerprint

leucine
Scaling laws
Biomolecules
Leucine
scaling laws
Sputtering
sputtering
Chemical activation
Valine
activation
Ions
Molecules
Insulin
Power electronics
electronics
Specific heat
Desorption
insulin
ions
Activation energy

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

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abstract = "A linear scaling is found for intact biomolecules in the form of in the formof 1n(Y/Se)-1/Se where Y, and Se are the sputtering yield and the electronic stopping power, respectively. The law is in good agreement with the experimental data for valine, leucine, and insulin molecules in various charge states in a broad range of Se. The thermal spike model of the author is applied and the activation energies of desorption U are obtained from the slope of the semilogarithmic lines. U is considerably higher for neutral leucine molecules than for ions. The Coulomb contribution to U for molecular ions does not depend on Se in a broad range. During sputtering, the specific heat is approximately 10{\%} of its room temperature value for valine and leucine.",
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AB - A linear scaling is found for intact biomolecules in the form of in the formof 1n(Y/Se)-1/Se where Y, and Se are the sputtering yield and the electronic stopping power, respectively. The law is in good agreement with the experimental data for valine, leucine, and insulin molecules in various charge states in a broad range of Se. The thermal spike model of the author is applied and the activation energies of desorption U are obtained from the slope of the semilogarithmic lines. U is considerably higher for neutral leucine molecules than for ions. The Coulomb contribution to U for molecular ions does not depend on Se in a broad range. During sputtering, the specific heat is approximately 10% of its room temperature value for valine and leucine.

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