Novel nanoparticle-based colorimetric probes and sensors for determining phenolic antioxidants, biothiols, nitrite and hydrogen peroxide

Apak R. , Ercag E., Ozyurek M., Guclu K., Uzer A., Celik S. E. , ...Daha Fazla

26th Anniversary World Congress on Biosensors (Biosensors), Gothenburg, İsveç, 25 - 27 Mayıs 2016, cilt.27, ss.94-95 identifier

  • Cilt numarası: 27
  • Doi Numarası: 10.1016/j.protcy.2017.04.040
  • Basıldığı Şehir: Gothenburg
  • Basıldığı Ülke: İsveç
  • Sayfa Sayıları: ss.94-95


This study examines the principles and milestones of nanoparticle (NP)-based colorimetric sensors and probes developed by our research group. A novel method for antioxidant capacity estimation was developed on the polyphenol-mediated growth of Ag-NPs and optical monitoring of the corresponding plasmon absorption bands. A new optical sensor using Ellman's reagent-adsorbed gold nanoparticles in colloidal solution was devised to selectively determine biothiols. Nitrite was determined by means of 4-aminothiophenol-modified Au-NPs and naphthylethylene diamine as coupling agent. Hydrogen peroxide was detected with the use of Fe3O4 magnetite NPs as peroxidase-like catalyst using a N,N-dimethyl-p-phenylenediamine (DMPD) probe. (C) 2017 The Authors. Published by Elsevier Ltd.