Entropy-driven adsorption of carbon nanotubes on (0 0 1) and (1 1 1) surfaces of CeO2 islands grown on sapphire substrate

S. Kunsági-Máté, Jia Cai Nie

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

According to the aim to compose combinatorial material by adsorption of carbon nanotubes onto the structured CeO2 surface the interaction of the armchair (5,5) and zigzag (8,0) nanotubes with the (0 0 1) and (1 1 1) surfaces of CeO2 islands have been investigated by theoretical methods. The thermodynamics of the adsorption were studied at the low surface coverage region. The interaction energy between the nanotube and the different CeO2 surfaces shows significant increase when the size of the interface reaches 7-8 unit cells of CeO2 and it remains unchanged in the larger interface region. However, the entropy term of the adsorption is significantly high when the distances of CeO2 islands are equal to 27 nm (adsorption of armchair (5,5) nanotube) or 32 nm (adsorption of zigzag (8,0) nanotube). This property supports adsorption of nanotubes onto CeO2 surfaces which possesses a very specific surface morphology. A long-wave vibration of nanotubes was identified as background of this unexpected phenomenon. This observation could be applicable in the development of such procedures where the nanotube adsorption parallel to the surface is aimed to perform.

Original languageEnglish
Pages (from-to)654-659
Number of pages6
JournalSurface Science
Volume604
Issue number7-8
DOIs
Publication statusPublished - Apr 15 2010

Fingerprint

Carbon Nanotubes
Aluminum Oxide
Sapphire
Nanotubes
Carbon nanotubes
nanotubes
sapphire
Entropy
carbon nanotubes
entropy
Adsorption
adsorption
Substrates
planetary waves
Surface morphology
interactions
Thermodynamics
vibration
thermodynamics
cells

Keywords

  • Adsorption kinetics
  • Density functional calculations
  • Molecular dynamics
  • Physical adsorption
  • Surface thermodynamics

ASJC Scopus subject areas

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

Cite this

Entropy-driven adsorption of carbon nanotubes on (0 0 1) and (1 1 1) surfaces of CeO2 islands grown on sapphire substrate. / Kunsági-Máté, S.; Nie, Jia Cai.

In: Surface Science, Vol. 604, No. 7-8, 15.04.2010, p. 654-659.

Research output: Contribution to journalArticle

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