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Pregled bibliografske jedinice broj: 708593

The synthesis of gold nanoparticles by a citrate-radiolytical method


Hanžić, Nikolina; Jurkin, Tanja; Maksimović, Aleksandar; Gotić, Marijan
The synthesis of gold nanoparticles by a citrate-radiolytical method // Radiation physics and chemistry, 106 (2015), 77-82 doi:10.1016/j.radphyschem.2014.07.006 (međunarodna recenzija, članak, znanstveni)


Naslov
The synthesis of gold nanoparticles by a citrate-radiolytical method

Autori
Hanžić, Nikolina ; Jurkin, Tanja ; Maksimović, Aleksandar ; Gotić, Marijan

Izvornik
Radiation physics and chemistry (0969-806X) 106 (2015); 77-82

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Gold; nanoparticles; citrate; gamma-irradiation; radiolytical synthesis; colloid

Sažetak
The classical citrate method is based on the reduction of an Au(III) precursor with sodium citrate in an aqueous solution near the boiling point. In this work gold nanoparticles (GNPs) were synthesised via a citrate method using reduction by gamma-irradiation at room temperature. The Au(III)–citrate aqueous precursor solution was gamma-irradiated to doses of up to 30 kGy. The dose rate of gamma-irradiation was around 8 kGy h-1. The GNP size was controlled by the adsorbed dose as well as by different saturated gases (air or nitrogen) present in precursor solutions. The results showed that gamma-irradiation produced smaller GNPs in the presence of precursor solutions saturated with nitrogen compared with the ones saturated with air. By increasing both the gold(III) and citrate concentrations in precursor solutions, stable and highly concentrated colloidal gold/citrate suspensions were synthesised using classical and citrate radiolytical reduction methods. Gamma-irradiation thus produced well-dispersed and highly concentrated GNPs in an aqueous citrate solution in the presence of dissolved oxygen and without adding any reducing or stabilising agents. Radiolytically intensified citrate oxidation and decarboxylation to acetone and other products by dissolved oxygen was advantageous for Au(III) reduction and subsequent formation of gold nanoparticles. Since the completely same precursor solutions were used both in the classical and citrate-radiolytical reduction methods, a real comparison of GNP sizes between these two methods was given.

Izvorni jezik
Engleski

Znanstvena područja
Kemija



POVEZANOST RADA


Projekt / tema
098-0982904-2952 - Sinteza i mikrostruktura metalnih oksida i oksidnih stakala (Mira Ristić, )
098-0982904-2955 - Odnosi struktura-svojstvo modificiranih polimernih materijala (Irina Pucić, )

Ustanove
Institut "Ruđer Bošković", Zagreb

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus


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