Comparative study on the synthesis of γ-Fe_2O_3 and Fe_3O_4 nanocrystals using high-temperature solution-phase technique

摘要

Increasing attention in recent years has been focused on nanocrystals of magnetic oxides because of their fascinating properties and wide range of potential applications in ferrofluids, information storage and medicine [1]. As an example, single-domain magnetic particle assemblies are considered to be important in ultra-high density magnetic recording, which in turn necessitates the requirement of non-agglomerated magnetic nanocrystals. This has further motivated intense research in the direction of preparation and processing of monolayer functionalized magnetic nanocrystals [2]. Several magnetic oxide nanocrystals including γ-Fe_2O_3 and Fe_3O_4 have been synthesized by using aqueous precipitation, microemulsion and other methods [3]. Recently, Alivistaos et al.