| Autor: |
Nandita Deb, Rimi Rashid, H. Das, Ishtiaque M. Syed, S. Manjura Hoque |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
|
| Zdroj: |
Royal Society Open Science, Vol 10, Iss 10 (2023) |
| Druh dokumentu: |
article |
| ISSN: |
2054-5703 |
| DOI: |
10.1098/rsos.230384 |
| Popis: |
We used a hydrothermal technique to develop nano-scale α-Fe2O3 particles and functionalized them with chitosan. An X-ray diffraction study revealed α-Fe2O3 nanoparticles were of single-phase, lattice constants were a = 5.07 Å and c = 13.68 Å, and the grain size was 27 nm. The presence of lattice fringes in the HRTEM image confirmed the crystalline nature of the α-Fe2O3. The Mössbauer spectra reveal a mixed relaxation state, which supports the PPMS studies. Zero-field cooled studies revealed the existence of a Morin transition and blocking temperature. The z-average value of the coated particles by DLS was between 218 and 235 nm, PDI ranged from 0.048 to 0.119, and zeta potential was +46.8 mV. We incubated the Vero and HeLa cell lines for 24 h to study the viability of the nanohybrids at different concentrations. Hyperthermia studies revealed the maximum temperature and specific loss power attained by the hematite–chitosan nanohybrid solution of a concentration between 0.25–4 mg ml−1. The Tmax at the lowest and highest concentrations of 0.25 and 4 mg ml−1 were 42.9 and 48.3°C, while the SLP were 501.6 and 35.5 W g−1, which are remarkably high when the maximum magnetization of α-Fe2O3 nanoparticles was as small as 1.98 emu g−1 at 300 K. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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