A reaction model for plasma coating of nanoparticles by amorphous carbon layers

Alexander Yarin, B. Rovagnati, F. Mashayek, T. Matsoukas

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

A detailed chemical kinetics scheme of the reactions occurring in a C H4 H2 plasma, namely, electron-neutral, ion-neutral, and neutral-neutral reactions, is implemented for the prediction of the species fluxes toward the surface of a submicron particle in a low-pressure environment. Surface reactions at the particle surface are also accounted for. Kinetic theory is applied in the collisionless region within a distance of one mean free path away from the particle, while continuum theory is implemented to solve for species transport in the outer region where reactive-diffusive phenomena occur. These regions are bounded by appropriate boundary conditions. The self-consistent electric field is obtained by solving the Poisson's equation in the continuum region. The charged and neutral species distributions are calculated and the growth rate of the amorphous carbon layer at the particle surface, as well as particle charging, are predicted. The predicted growth rate is within the range of experimental data from literature for similar conditions. This shows that the model reflects rather accurately the complicated physicochemical phenomena occurring in real systems.

Original languageEnglish
Article number064310
JournalJournal of Applied Physics
Volume99
Issue number6
DOIs
Publication statusPublished - 2006 Apr 14
Externally publishedYes

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coatings
nanoparticles
carbon
particle charging
continuums
electron plasma
Poisson equation
kinetic theory
mean free path
surface reactions
reaction kinetics
low pressure
boundary conditions
electric fields
predictions
ions

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Physics and Astronomy(all)

Cite this

A reaction model for plasma coating of nanoparticles by amorphous carbon layers. / Yarin, Alexander; Rovagnati, B.; Mashayek, F.; Matsoukas, T.

In: Journal of Applied Physics, Vol. 99, No. 6, 064310, 14.04.2006.

Research output: Contribution to journalArticle

Yarin, Alexander ; Rovagnati, B. ; Mashayek, F. ; Matsoukas, T. / A reaction model for plasma coating of nanoparticles by amorphous carbon layers. In: Journal of Applied Physics. 2006 ; Vol. 99, No. 6.
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