Article history: Gold nanoparticles decorated onto titania (anatase) supports were produced through X-ray radiolysis, at Received 26 June 2017 ambient temperature and pressure in a method that departs from traditional routes, providing an out- Received in revised form 28 July 2017 standing control of Au nanoparticle size and dispersion. Au@TiO nanocomposites (NCs) were fabricated Accepted 14 August 2017 using different absorbed doses in the presence of NaOH, or urea, supported by 5–10 or 10–30 nm titania, Available online 18 August 2017 to determine their effects on the Au particle size distribution and loading. Au@TiO NCs fabricated at high absorbed doses (>7 kGy) had average Au NP size of 1.1 ± 0.1 nm. Large absorbed doses control Au NP size Keywords: by generating an abundance of reducing species (e , H•) resulting in an increase of Au seeds. At a lower aq Nanocomposites absorbed dose (0.72 kGy), the ligand affected the Au particle size distribution and a reduction in size by X-rays 20% of the Au was observed using NaOH. Au NPs were tethered to titania through oxygen as indicated by Radiolysis X-ray photoelectron spectroscopy analysis. The Au@TiO NCs were tested for their radiosensitizing effect Radiosensitization Gold by monitoring decomposition
Applied Surface Science – Elsevier
Published: Jan 1, 2018
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