- Teck Yee Tan: XRD and magnetic properties studies of "clicked" Mn12-based molecules with magnetite nanoparticles
- 7. 2. 2018, 14:30
- lecture room F2, first floor Ke Karlovu 5
- more information
Abstract:
Magnetic nanomaterials have wide range of applications many potential applications such as biomedicine, information storage, and catalysis. In this report, we synthesis, study the X-ray diffraction structural and magnetic properties of magnetite nanoparticles functionalized by azel-est-hydrazide and characterizing both old and new nanomolecules after "clicking" with functional group in Mn12-(4-formylbenzoate). This study emphasizes the effect of nanoparticle size on blocking temperature, saturation and coercivity magnetization. The average crystallite size of the magnetite complexes is found increased by about 10 Å, which is 10 nm before and 11 nm after clicked with Mn12-(4-formylbenzoate). The low saturation magnetization observed are likely credited to spin-canting of surface spins[1], nanoparticles size and functionalization[2, 3].
References
1. Nadeem, K., et al., Spin-glass freezing of maghemite nanoparticles prepared by microwave plasma synthesis. Journal of Applied Physics, 2012. 111(11).
2. Lima-Tenorio, M.K., et al., Tuning the magnetic properties of ferrite nanoparticles by Zn and Co doping. Materials Letters, 2017. 195: p. 151-155.
3. Alves, C.R., et al., Low temperature experimental investigation of finite-size and surface effects in CuFe(2)O(4) nanoparticles of ferrofluids. Ismanam 2003: Metastable, Mechanically Alloyed and Nanocrystalline Materials, 2004. 20-21: p. 694-699.