Adsorption behaviors of V2O5 nanowires on binary mixed self-assembled monolayers

Jae Pil Koo, Yong Kwan Kim, Jeong Sook Ha

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

The adsorption behaviors of V2O5 nanowires on binary mixed self-assembled monolayers (SAMs) were investigated with variation of the mixing ratio of two differently terminated thiolates on Au. Hydroxyl-covered V2O5 nanowires showed a preferential adsorption on amine (NH2)-terminated thiolates over methyl (CH3)-terminated ones. However, on the binary mixed SAM of NH2- and CH3-terminated thiols, the adsorption behavior did not follow a simple expectation based upon the electrostatic interaction. The total number of adsorbed V2O5 nanowires increased with the mole fraction of NH2-terminated thiolates up to χN 2 ∼ 0.5, then it decreased with further increase of χN H2. The height distribution of adsorbed nanowires showed that the relative portion of the agglomerated wires thicker than 3.5 nm to individual wires thinner than 3.5 nm increased up to χN H2 ∼ 0.75 and then it decreased with further increase of χN H2. The dispersion of molecules with polar-functional groups as well as the molecular ordering of mixed SAMs is attributed to such adsorption behaviors of V2O5 nanowires.

Original languageEnglish
Pages (from-to)1528-1533
Number of pages6
JournalApplied Surface Science
Volume253
Issue number3
DOIs
Publication statusPublished - 2006 Nov 30

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Keywords

  • Atomic force microscope
  • Binary mixed self-assembled monolayers
  • Selective adsorption
  • VO nanowires

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Condensed Matter Physics

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