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Antibacterial activity of CuFe₂O₄ NPs against S_ aureus and E_ coli at different ratios_
| Sample | Control (DIW) | 62.5 µg/mL | 125 µg/mL | 250 µg/mL | 500 µg/mL |
|---|---|---|---|---|---|
| S. aureus | 6 ± 0.0 | 29.33 ± 3.21 | 33 ± 2.64 | 36 ± 2.64 | 38.66 ± 2.30 |
| E. coli | 6 ± 0.0 | 22.66 ± 2.08 | 26 ± 1.73 | 31.66 ± 2.08 | 33.66 ± 1.52 |
Phasic composition and crystallographic parameters of the synthesized CuFe2O4 sample_
| Spinel ferrite | Phasic chemical composition | Estimated weight fraction (%) | Crystal system | Space group | Lattice parameters |
|---|---|---|---|---|---|
| CuFe2O4 | CuFe2O4 | ≈75 | Cubic | Fd-3m | a = b = c = 8.39 Å; α = β = γ = 90° |
| Fe2O3 | ≈12 | Rhombohedral (hexagonal setting) | R-3c | a = b = 5.03 Å, c = 13.75 Å; α = β = 90°, γ = 120° | |
| FeO | ≈8 | Cubic | Fm-3m | a = b = c = 4.33 Å; α = β = γ = 90° | |
| CuO | ≈5 | Monoclinic | C2/c | a = 4.68 Å, b = 3.42 Å, c = 5.13 Å; α = γ = 90°, β ≈ 99.5° |
Hemolysis data of CuFe₂O₄ NPs_
| Samples | Result of device | Result after |
|---|---|---|
| 25 µg/mL | 0.045 | 4.83 |
| 12.5 µg/mL | 0.042 | 3.39 |
| Negative control | 0.035 | ـــ |
| Positive control | 0.241 | ـــ |
Cations distribution derived from Rietveld refinement of CuFe2O4 sintered at 800°C for 2 h_
| Spinel ferrite | a (Å) | χ 2 | R wp (%) | R exp (%) | Cell volume (V), (Å3) | A-site (tetrahedral) | B-site (octahedral) | Final chemical formula | Inversion parameter (ϕ) |
|---|---|---|---|---|---|---|---|---|---|
| CuFe2O4 | 8.39 | 1.8 | 9.3 | 6.88 | 590.59 | ( | [ | ( | 1 |