Radiation Stability of the BSA Modified Biocompatible Magnetic Fluid

Abstract

The aim of the presented work was to investigate the stability of biocompatible magnetic uid, i.e. water-based magnetic uid containing magnetite nanoparticles stabilized by surfactant sodium oleate and modied by bovine serum albumin (BSA) after electron irradiation. Samples with the same concentration of Fe3O4 but dierent mass ratio BSA/Fe3O4 (w/w= 0.25, 1.0 and 2.5) were studied. The electron irradiation caused about 10% reduction of the saturation magnetization in the samples with w/w BSA/Fe3O4 ratio of 0.25 and less than 5% in the samples with w/w BSA/Fe3O4 ratio of 1 and 2.5.

Magnetic Positive Positioning: Toward the application in space propulsion

“…The degradation process is attributed to the aggregation of particles produced by ionization. Similar experiments with bovine serum albumin (BSA) modified ferrofluids containing sodium oleate stabilized 3 4 nanoparticles show a dependence between the BSA/ 3 4 w/w ratio and the stability against radiation [65].…”

“…The effects of electron irradiation on biocompatible water-based ferrofluids are explored by Tomašovičová et al with natrium oleate and double layer natrium oleate/PEG surfactants [63]. Stable reductions in saturation magnetization of a 50% and a 25% are respectively measured after applying an irradiation dose of 1000 Gy, although most of the loss is already produced for 5 Gy.…”