Fe3O4–Au and Fe2O3–Au Hybrid Nanorods: Layer-by-Layer Assembly Synthesis and Their Magnetic and Optical Properties
1 Center of Materials Engineering, Zhejiang Sci-Tech University, Xiasha University Town, 310018, Hangzhou, People’s Republic of China
2 Lab of Multiphase Flow Erosion & Deposition, Zhejiang Sci-Tech University, Xiasha University Town, 310018, Hangzhou, People’s Republic of China
Nanoscale Research Letters 2010, 5:1755-1761 doi:10.1007/s11671-010-9706-yPublished: 1 August 2010
A layer-by-layer technique has been developed to synthesize FeOOH–Au hybrid nanorods that can be transformed into Fe2O3–Au and Fe3O4–Au hybrid nanorods via controllable annealing process. The homogenous deposition of Au nanoparticles onto the surface of FeOOH nanorods can be attributed to the strong electrostatic attraction between metal ions and polyelectrolyte-modified FeOOH nanorods. The annealing atmosphere controls the phase transformation from FeOOH–Au to Fe3O4–Au and α-Fe2O3–Au. Moreover, the magnetic and optical properties of as-synthesized Fe2O3–Au and Fe3O4–Au hybrid nanorods have been investigated.