Monodisperse single-crystal mesoporous magnetite nanoparticles induced by nanoscale gas bubbles

Research Paper

Abstract

Monodisperse single-crystal mesoporous magnetite nanospheres with particle size of ~100 nm and pore size of 7.6 nm were synthesized through a solvothermal process. Transmission electron microscopy images clearly show the mesoporous structure of the products. Nitrogen adsorption–desorption data confirmed that the pore size is in the range of mesoscale. Based on the evolution experiments, a plausible mechanism was proposed including a gas bubble induced mesoporous structure formation process. The mesoporous magnetite nanospheres show high magnetization value, which resulted from the single crystalline structure, as confirmed by the high-resolution transmission electron microscopy data. By simply decreasing the concentration of ammonium acetate, magnetite hollow spheres or aggregated nanoparticles could be obtained. This work may provide new advances in the approaches to fabricate magnetite with different interior structures.

Keywords

Nanobubbles Magnetite Mesoporous Single-crystal 

Notes

Acknowledgments

The work was supported by the National Research Foundation of Korea (NRF) Grant funded by the Ministry of Education, Science and Technology, Korea (MEST) (Acceleration Research Program Program (No. 2012-0000108); Pioneer Research Center Program (No. 2012-0000421/2012-0000422)), and the Brain Korea 21 Project of the MEST.

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Copyright information

© Springer Science+Business Media Dordrecht 2012

Authors and Affiliations

  1. 1.Pioneer Research Center for Nanogrid Materials, Department of Polymer Science and EngineeringPusan National UniversityBusanKorea

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