Table 3.
Experimental values of the Mössbauer spectra of Fe3O4 nanoparticles at different stages of modification and carboranes immobilization.
| Sample | A-Sublattice Hn, kOe |
B-Sublattice Hn, kOe |
Intensity of Doublet, % | IB-sublattice/IA-sublattice | δ (Fe3-δ)O4 | χ2 |
|---|---|---|---|---|---|---|
| Fe3O4 | 475.34 ± 3.24 | 425.84 ± 4.53 | 0.7 | 74.9/24.4 | 0.327 ± 0.031 | 0.94 ± 0.03 |
| Fe3O4-TMSPM | 479.57 ± 2.32 | 427.07 ± 3.43 | 0.6 | 75.8/23.6 | 0.331 ± 0.025 | 1.09 ± 0.05 |
| Fe3O4-TMSPM-PAA | 469.42 ± 3.25 | 422.65 ± 4.31 | 1.2 | 84.5/14.3 | 0.330 ± 0.027 | 1.10 ± 0.06 |
| Fe3O4-TMSPM-PAA/PALAm | 465.75 ± 4.21 | 440.54 ± 3.64 | 2.5 | 87.4/10.1 | 0.332 ± 0.025 | 1.08 ± 0.04 |
| Fe3O4-TMSPM-PAA/PALAm-Gd | 465.32 ± 4.14 | 435.17 ± 5.42 | 1.6 | 86.5/11.9 | 0.322 ± 0.016 | 1.04 ± 0.10 |
| Fe3O4-TMSPM-PAA/PALAm-Gd -PAA | 459.65 ± 3.52 | 437.13 ± 2.31 | 1.1 | 87.2/11.7 | 0.304 ± 0.014 | 1.01 ± 0.09 |
| Fe3O4-TMSPM-PAA/PALAm-Gd- PAA/PALAm | 469.64 ± 2.45 | 435.65 ± 2.56 | 0.9 | 87.7/11.4 | 0.323 ± 0.021 | 1.05 ± 0.07 |
| Fe3O4-TMSPM-PAA/PALAm-Gd- PAA/PALAm—Carborane | 468.42 ± 2.63 | 437.39 ± 2.35 | 0.7 | 86.2/13.1 | 0.317 ± 0.027 | 1.21 ± 0.04 |