Surface and Structural Properties of Gold Nanoparticles and Their Biofunctionalized Derivatives in Aqueous Electrolytes Solution

Edit Csapó, Dániel Sebok, Julia Makrai Babić, Filip Šupljika, Gabriella Bohus, Imre Dékány, Nikola Kallay, Tajana Preočanin

Research output: Article

12 Citations (Scopus)


Gold nanoparticles reduced by sodium citrate (d ∼ 10 nm) and purchased gold colloid particles (d ∼ 500 nm) were examined and compared. The properties of both gold particles and their biofunctionalized derivatives with L-cysteine and L-glutathione were studied in the presence of sodium nitrate. The structural investigations indicated an aggregated inner structure. The isoelectric points of pure gold, citrate reduced gold, and functionalized gold were measured and compared. The low isoelectric point of pure gold/water interface was explained by considering the distribution and accumulation of H+ and OH- ions within the interfacial water layer, being more pronounced for OH- ions.

Original languageEnglish
Pages (from-to)815-825
Number of pages11
JournalJournal of Dispersion Science and Technology
Issue number6
Publication statusPublished - jún. 2014


ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Polymers and Plastics

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