Electroanalytical behaviour of a nanoarray self-assembled thiocholesterol gold electrode

Yang Z., Kauffmann J., Valenzuela M., ÖZKAN S. A.

MIKROCHIMICA ACTA, vol.131, no.1-2, pp.85-90, 1999 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 131 Issue: 1-2
  • Publication Date: 1999
  • Doi Number: 10.1007/s006040050012
  • Journal Name: MIKROCHIMICA ACTA
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.85-90
  • Keywords: self-assembled monolayers, nanoarray, phenothiazines, gold, modified electrode, MIXED MONOLAYER ASSEMBLIES, AMPEROMETRIC TRANSDUCTION, ENZYME ELECTRODES, OPTICAL SIGNALS, ACID MONOLAYERS, AU-ELECTRODES, THIOL ANALOGS, CHEMISTRY, SURFACTANTS, CHOLESTEROL
  • Ankara University Affiliated: Yes

Abstract

Thiocholesterol forms a self-assembled monolayer (SAM) on polycrystalline gold, offering a defect-rich hydrophobic surface. This SAM gold electrode has been exploited in batch and flow injection analysis (FIA) as it allows selective detection of hydrophobic analytes such as phenothiazines in presence of potentially interfering species such as ascorbic acid. Several phenothiazines have been investigated. Quantification has been achieved in FIA, in a broad linear concentration range: 0.5-100 mu M The stability of the modified electrode allows more than 500 sample injections in FIA.