Nano Express

Nanoscale Research Letters

, Volume 4, Issue 8, pp 926-931

Open Access This content is freely available online to anyone, anywhere at any time.

One-Pot Reaction and Subsequent Annealing to Synthesis Hollow Spherical Magnetite and Maghemite Nanocages

  • Wei WuAffiliated withKey Laboratory of Acoustic and Photonic Materials and Devices of Ministry of Education, Wuhan UniversityDepartment of Physics, Wuhan UniversityCenter of Electron Microscopy, Wuhan University
  • , Xiangheng XiaoAffiliated withDepartment of Physics, Wuhan UniversityCenter of Electron Microscopy, Wuhan University
  • , Shaofeng ZhangAffiliated withDepartment of Physics, Wuhan University
  • , Hang LiAffiliated withDepartment of Physics, Wuhan University
  • , Xiaodong ZhouAffiliated withDepartment of Physics, Wuhan University
  • , Changzhong JiangAffiliated withKey Laboratory of Acoustic and Photonic Materials and Devices of Ministry of Education, Wuhan UniversityDepartment of Physics, Wuhan UniversityCenter of Electron Microscopy, Wuhan University Email author 

Abstract

Water-soluble hollow spherical magnetite (Fe3O4) nanocages (ca. 100 nm) with high saturation magnetization are prepared in a one-pot reaction by sol-gel method and subsequent annealing to synthesise the maghemite (γ-Fe2O3) nanocages with similar nanostructures. The nanocages have been investigated by powder X-ray diffraction (XRD), transmission electron microscope (TEM), high-resolution transmission electron microscope (HRTEM), and superconducting quantum interference device (SQUID). The results indicated that glutamic acid played an important role in the formation of the cage-like nanostructures.

Keywords

Magnetite Maghemite Sol-gel growth Nanocages