Biocompatible magnetic fluid precursors based on aspartic and glutamic acid modified maghemite nanostructures

Biocompatible magnetic fluid precursors based on chemically modified maghemite nanostructures (γ-Fe 2O 3) are able to chemisorb aspartic and glutamic acids, as shown by conductometric measurements. The amino acids adsorb onto the maghemite surface following an adsorption isotherm. The modified nanop...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2001, Vol.225 (1), p.67-72
Main Authors: Sousa, M.H., Rubim, J.C., Sobrinho, P.G., Tourinho, F.A.
Format: Article
Language:English
Subjects:
Adsorption isotherm
Aspartate-based ferrofluids
Biological and medical sciences
Ferrofluids
Glutamate-based ferrofluids
Investigative techniques, diagnostic techniques (general aspects)
Maghemite nanostructure
Magnetic fluid
Medical sciences
Miscellaneous. Technology
Pathology. Cytology. Biochemistry. Spectrometry. Miscellaneous investigative techniques
Radiotherapy. Instrumental treatment. Physiotherapy. Reeducation. Rehabilitation, orthophony, crenotherapy. Diet therapy and various other treatments (general aspects)
Raman spectroscopy
Technology. Biomaterials. Equipments. Material. Instrumentation
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Summary:Biocompatible magnetic fluid precursors based on chemically modified maghemite nanostructures (γ-Fe 2O 3) are able to chemisorb aspartic and glutamic acids, as shown by conductometric measurements. The amino acids adsorb onto the maghemite surface following an adsorption isotherm. The modified nanoparticles formed a stable colloidal solution at a pH of 5–8. Raman and FTIR spectroscopy directly showed that the investigated amino acids adsorb on the maghemite surface in the form of their respective salts, glutamate and aspartate.
ISSN:0304-8853
DOI:10.1016/S0304-8853(00)01229-4