Miscibility of adsorbed 1-undecanethiol and 11-mercaptoundecanoic acid species in binary self-assembled monolayers on Au(111)

Takashi Kakiuchi, Minehiko Iida, Narutoshi Gon, Daisuke Hobara, Shinichiro Imabayashi, Katsumi Niki

Research output: Contribution to journalArticle

86 Citations (Scopus)

Abstract

The miscibility of a binary self-assembled monolayer (SAM) of 1-undecanethiol (UDT) and 11-mercaptoundecanoic acid (MUA) on Au(111) has been studied using voltammetry of the reductive desorption of thiol, X-ray photoelectron spectroscopy, and scanning tunneling microscopy (STM). The binary SAMs show only a single peak on a voltammogram for the reductive desorption over the entire range of the mixing ratio of the two thiols, suggesting that these two thiols having the same number of methylene units are well-mixed in the SAMs. This is in marked contrast with the phase-separated binary self-assembled SAMs where the two thiols differ both in the type of ω-terminal and in the number of methylene units in their alkyl-chain parts. Correspondingly, STM images of MUA-UDT monolayers show no distinct domain formation, unlike the phase-separated SAMs such as the one composed of 3-mercaptopropionic acid and hexadecanethiol. However, MUA molecules seem to prefer the domain boundaries.

Original languageEnglish
Pages (from-to)1599-1603
Number of pages5
JournalLangmuir
Volume17
Issue number5
DOIs
Publication statusPublished - 2001 Mar 6
Externally publishedYes

Fingerprint

Self assembled monolayers
Sulfhydryl Compounds
thiols
solubility
Solubility
acids
Acids
Scanning tunneling microscopy
methylene
scanning tunneling microscopy
Desorption
3-Mercaptopropionic Acid
desorption
Voltammetry
mixing ratios
Monolayers
X ray photoelectron spectroscopy
photoelectron spectroscopy
Molecules
11-mercaptoundecanoic acid

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Colloid and Surface Chemistry

Cite this

Miscibility of adsorbed 1-undecanethiol and 11-mercaptoundecanoic acid species in binary self-assembled monolayers on Au(111). / Kakiuchi, Takashi; Iida, Minehiko; Gon, Narutoshi; Hobara, Daisuke; Imabayashi, Shinichiro; Niki, Katsumi.

In: Langmuir, Vol. 17, No. 5, 06.03.2001, p. 1599-1603.

Research output: Contribution to journalArticle

Kakiuchi, Takashi ; Iida, Minehiko ; Gon, Narutoshi ; Hobara, Daisuke ; Imabayashi, Shinichiro ; Niki, Katsumi. / Miscibility of adsorbed 1-undecanethiol and 11-mercaptoundecanoic acid species in binary self-assembled monolayers on Au(111). In: Langmuir. 2001 ; Vol. 17, No. 5. pp. 1599-1603.
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