Relaxation of Polymer Coated ${\rm Fe}_{3}{\rm O}_{4}$ Magnetic Nanoparticles in Aqueous Solution

@article{Keshavarz2010RelaxationOP,
  title={Relaxation of Polymer Coated \$\{\rm Fe\}\_\{3\}\{\rm O\}\_\{4\}\$ Magnetic Nanoparticles in Aqueous Solution},
  author={Sahar Keshavarz and Yaolin Xu and Spencer Hrdy and Clay Lemley and Tim Mewes and Yuping Bao},
  journal={IEEE Transactions on Magnetics},
  year={2010},
  volume={46},
  pages={1541-1543}
}
Magnetic nanoparticles have shown great capability of sensing biological molecules in solution by correlating the magnetic susceptibility with the nanoparticle surface coatings. Here, we report on a new experimental approach of measuring magnetic nanoparticle relaxation. It uses a broadband ferromagnetic resonance setup specifically designed for samples in solution, enabling measurements of nanoparticles at variable frequencies up to 40 GHz. This design enables precise determination of the g… 
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References

SHOWING 1-10 OF 21 REFERENCES
Magnetic resonance in nanoparticles: between ferro- and paramagnetism
TLDR
The 'quantization' model is used which includes summation of resonance transitions over the whole energy spectrum of a nanoparticle considered as a giant exchange cluster, supplemented with some phenomenological assumptions, provides satisfactory agreement with the experimental data.
Brownian magnetic relaxation of water-based cobalt nanoparticle ferrofluids
Following the synthesis of monodispersed 20nm cobalt nanoparticles via a thermal decomposition method we have successfully transferred these hydrophobic nanoparticles into the water phase using
The fabrication of high sensitive spin‐valve sensor for magnetic bead detection
Manipulation and detection of magnetic beads on a chip open up new perspectives for analysis of magnetically labeled specimens in biological and medical applications. This work has studied to achieve
One-step synthesis of highly water-soluble magnetite colloidal nanocrystals.
TLDR
The monodisperse, highly water-soluble, superparamagnetic, and biocompatible magnetite nanocrystals should find immediate important biomedical applications.
Biological sensing with magnetic nanoparticles using brownian relaxation (invited)
TLDR
This work demonstrates a substrate-free biomagnetic sensing approach using the magnetic ac susceptibility of ferromagnetic particles suspended in a liquid, which requires only one binding event.
Magnetization relaxation and structure of CoFeGe alloys
The magnetic relaxation of 10 and 50 nm thin films of (CoFe)100−xGex (0 at. %≤x≤35 at. %) alloys was investigated by broadband ferromagnetic resonance (FMR) experiments. 10 nm thin films exhibit a
Advances in Giant Magnetoresistance Biosensors With Magnetic Nanoparticle Tags: Review and Outlook
TLDR
The theoretical and experimental results thus far suggest that magneto-nano biochip-based GMR sensor arrays and nanotags hold great promise in biomedicine, particularly for point-of-care molecular diagnostics of cancer, infectious diseases, radiation injury, cardiac diseases, and other diseases.
...
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