Table 4.
Main characteristics of non-iron oxide negative CAs
| Composition | Size nm | r2 mM−1.s−1 | T °C | B0 T | Ref | |
|---|---|---|---|---|---|---|
| Manganite | 57 nm sized La0.75Sr0.25MnO3 NPs coated with a silica layer of 80–100 nm in thickness | 150 | 580 a 540 a 520 a |
20 20 20 |
0.5 1.5 3.0 |
[62] |
| Ferrite | 4 nm sized CoFe2O4 NPs in carboxylate PEG | 30 | 185 b | 25 | 1.5 | [73] |
| 8 nm sized MnFe2O4 NPs in PEG-PCL | 80 | 66 b | 25 | 1.5 | ||
| Fe | Less than 10 nm sized Fe NPs coated by PEG | 10 | 129 c | 25 | 1.5 | [74] |
| EFNPs | Fe@NixFe3-xO4 NPs coated by PEG | 15 | 9.96 d | 25 | 2.4 | [70] |
Expressed per mM of (a) manganese atoms, (b) paramagnetic cations, (c) iron atoms, or (d) particles.