Laser-induced synthesis of composite materials based on iridium, gold and platinum for non-enzymatic glucose sensing

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2 Scopus citations

Abstract

A simple approach for in situ laser-induced modification of iridium-based materials to increase their electrocatalytic activity towards enzyme-free glucose sensing was proposed. For this purpose, we deposited gold and platinum separately and as a mixture on the surface of pre-synthesized iridium microstructures upon laser irradiation at a wavelength of 532 nm. Then, we carried out the comparative investigation of their morphology, elemental and phase composition as well as their electrochemical properties. The best morphology and, as a result, the highest sensitivity (~9960 μA/mM cm2) with respect to non-enzymatic determination of D-glucose were demonstrated by iridium-gold-platinum microstructures also showing low limit of detection (~0.12 μM), a wide linear range (0.5 μM-1 mM) along with good selectivity, reproducibility and stability.

Original languageEnglish
Article number3359
JournalMaterials
Volume13
Issue number15
DOIs
StatePublished - Aug 2020

Scopus subject areas

  • Materials Science(all)

Keywords

  • Composites
  • Enzyme-free sensing
  • Glucose
  • Gold
  • Iridium
  • Laser-induced deposition of metal microstructures
  • Platinum

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