Combined Experimental and Theoretical Investigation of Heating Rate on Growth of Iron Oxide Nanoparticles

Hamed Sharifi Dehsari, Maziar Heidari, Anielen Halda Ribeiro, Wolfgang Tremel, Gerhard Jakob, Davide Donadio, Raffaello Potestio, Kamal Asadi

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Thermal decomposition is a promising route for the synthesis of highly monodisperse magnetite nanoparticles. However, the apparent simplicity of the synthesis is counterbalanced by the complex interplay of the reagents with the reaction variables that determine the final particle size and dispersity. Here, we present a combined experimental and theoretical study on the influence of the heating rate on crystal growth, size, and monodispersity of iron oxide nanoparticles. We synthesized monodisperse nanoparticles with sizes varying from 6.3 to 27 nm simply by controlling the heating rate of the reaction. The nanoparticles show size-dependent superparamagnetic behavior. Using numerical calculations based on the classical nucleation theory and growth model, we identified the relative time scales associated with the heating rate and precursor-to-monomer (growth species) conversion rate as a decisive factor influencing the final size and dispersity of the nanoparticles.

Original languageEnglish
Pages (from-to)9648-9656
Number of pages9
JournalChemistry of Materials
Volume29
Issue number22
DOIs
Publication statusPublished - 28 Nov 2017

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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