Study of ethanol macrocluster formed on hydroxyl and carboxyl group on gold surface in ethanol/cyclohexane binary liquids by surface plasmon resonance

Research output: Contribution to conferencePaperpeer-review

Abstract

We have recently found that ethanol molecules form a hydrogen-bonded organized structure from the silanol groups of the glass surface, which we call an "ethanol macrocluster". This study aims at developing a method for forming similar molecular macroclusters from the other hydrogen bonded functional groups in addition to the silanol group. We modified Au-deposited glass surface with 11-Mercaptoundecanol (11-MUN) and 11-Mercatoundecanoic acid (11-MUA), respectively. Adsorption of ethanol on these substrates was studied using the surface plasmon resonance (SPR) measurement in ethanol/cyclohexane binary liquids and estimated the thickness of the adsorbed ethanol layer. For both substrates, the difference in SPR resonance angles between the value for cyclohexane and 1.8 mol% ethanol was ca. 0.6 degree, corresponding to 7-8 nm thickness of the adsorbed ethanol layer. This result indicated the formation of the ethanol macroclusters from the OH and COOH groups on the Au substrate.

Original languageEnglish
Number of pages1
Publication statusPublished - 2005 Dec 1
Event54th SPSJ Annual Meeting 2005 - Yokohama, Japan
Duration: 2005 May 252005 May 27

Other

Other54th SPSJ Annual Meeting 2005
CountryJapan
CityYokohama
Period05/5/2505/5/27

Keywords

  • Adsorption
  • Hydrogen bonding
  • Molecular macrocluster
  • Self-assembled monolayer
  • Surface plasmon resonance

ASJC Scopus subject areas

  • Engineering(all)

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