Adsorption behaviors of V 2 O 5 nanowires on binary mixed self-assembled monolayers

Jae Pil Koo, Yong Kwan Kim, Jeong Sook Ha

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

The adsorption behaviors of V 2 O 5 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 V 2 O 5 nanowires showed a preferential adsorption on amine (NH 2 )-terminated thiolates over methyl (CH 3 )-terminated ones. However, on the binary mixed SAM of NH 2 - and CH 3 -terminated thiols, the adsorption behavior did not follow a simple expectation based upon the electrostatic interaction. The total number of adsorbed V 2 O 5 nanowires increased with the mole fraction of NH 2 -terminated thiolates up to χ N 2 ∼ 0.5, then it decreased with further increase of χ N 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 χ N H2 ∼ 0.75 and then it decreased with further increase of χ N 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 V 2 O 5 nanowires.

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

Keywords

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

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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