Control of size and aspect ratio in hydroquinone-based synthesis of gold nanorods

Carlo Morasso, Silvia Picciolini, Domitilla Schiumarini, Dora Mehn, Isaac Ojea-Jiménez, Giuliano Zanchetta, Renzo Vanna, Marzia Bedoni, Davide Prosperi, Furio Gramatica

Research output: Contribution to journalArticlepeer-review

Abstract

In this article, we describe how it is possible to tune the size and the aspect ratio of gold nanorods obtained using a highly efficient protocol based on the use of hydroquinone as a reducing agent by varying the amounts of CTAB and silver ions present in the “seed-growth” solution. Our approach not only allows us to prepare nanorods with a four times increased Au3+ reduction yield, when compared with the commonly used protocol based on ascorbic acid, but also allows a remarkable reduction of 50–60 % of the amount of CTAB needed. In fact, according to our findings, the concentration of CTAB present in the seed-growth solution do not linearly influence the final aspect ratio of the obtained nanorods, and an optimal concentration range between 30 and 50 mM has been identified as the one that is able to generate particles with more elongated shapes. On the optimized protocol, the effect of the concentration of Ag+ ions in the seed-growth solution and the stability of the obtained particles has also been investigated.

Original languageEnglish
Article number330
JournalJournal of Nanoparticle Research
Volume17
Issue number8
DOIs
Publication statusPublished - Aug 14 2015

Keywords

  • Au nanorods
  • CTAB
  • Hydroquinone
  • Nanoparticles
  • Plasmonics

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Modelling and Simulation
  • Chemistry(all)
  • Materials Science(all)
  • Bioengineering

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