Role of aqueous stabilizers in controlling structure and magnetism of laser-ablated iron oxide nanoparticles
Abstract
Iron oxide nanoparticles (IONPs) were synthesized by pulsed laser ablation in liquids using three aqueous media: pure water, citrate solution, and glutathione (GSH) solution. Structural characterization indicates that all samples share a spinel-type iron oxide crystalline core, with minor contributions from more oxidized iron oxide species. Electron microscopy reveals crystalline iron oxide cores with characteristic sizes of about 10 nm, while highlighting pronounced aggregation in pure water and significantly improved colloidal dispersion in the presence of citrate and GSH, associated with surface functionalization. Magnetic measurements reveal a strong dependence on surface chemistry and aggregation. At room temperature, water-synthesized IONPs exhibit the highest magnetization (approximate to 1.75 emu g(-1) at similar to 30 kOe), about 2.5-3 times larger than that of citrate and GSH stabilized samples, consistent with magnetically coupled aggregates. At low temperature, the trend is reversed, with functionalized samples showing a markedly enhanced magnetic response compared to water, indicating a dominant contribution from surface-related magnetic moments. These results demonstrate that the magnetic response of laser-ablated IONPs can be effectively tuned by controlling the aqueous medium and surface chemistry, without altering the crystalline core, offering a versatile and green strategy for designing iron oxide nanoparticles with tailored magnetic properties.
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BibTeX
@article{chiechio2026role,
title = {{Role of aqueous stabilizers in controlling structure and magnetism of laser-ablated iron oxide nanoparticles}},
author = {Regina Maria Chiechio and Stefano Boscarino and Cristiano Lo. Po and Maria Chiara Spadaro and Francesco Salutari and Olivier Hernandez and Thierry Guizouarn and Valérie Marchi and Paolo Musumeci and Maria Grazia Grimaldi and Francesco Ruffino},
journal = {Journal of Physics and Chemistry of Solids},
year = {2026},
month = may,
doi = {10.1016/j.jpcs.2026.113825},
url = {https://hal.science/hal-05654106v2},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Role of aqueous stabilizers in controlling structure and magnetism of laser-ablated iron oxide nanoparticles
AU - Regina Maria Chiechio
AU - Stefano Boscarino
AU - Cristiano Lo. Po
AU - Maria Chiara Spadaro
AU - Francesco Salutari
AU - Olivier Hernandez
AU - Thierry Guizouarn
AU - Valérie Marchi
AU - Paolo Musumeci
AU - Maria Grazia Grimaldi
AU - Francesco Ruffino
PY - 2026
DA - 2026/05/08
JO - Journal of Physics and Chemistry of Solids
DO - 10.1016/j.jpcs.2026.113825
UR - https://hal.science/hal-05654106v2
AB - Iron oxide nanoparticles (IONPs) were synthesized by pulsed laser ablation in liquids using three aqueous media: pure water, citrate solution, and glutathione (GSH) solution. Structural characterization indicates that all samples share a spinel-type iron oxide crystalline core, with minor contributions from more oxidized iron oxide species. Electron microscopy reveals crystalline iron oxide cores with characteristic sizes of about 10 nm, while highlighting pronounced aggregation in pure water and significantly improved colloidal dispersion in the presence of citrate and GSH, associated with surface functionalization. Magnetic measurements reveal a strong dependence on surface chemistry and aggregation. At room temperature, water-synthesized IONPs exhibit the highest magnetization (approximate to 1.75 emu g(-1) at similar to 30 kOe), about 2.5-3 times larger than that of citrate and GSH stabilized samples, consistent with magnetically coupled aggregates. At low temperature, the trend is reversed, with functionalized samples showing a markedly enhanced magnetic response compared to water, indicating a dominant contribution from surface-related magnetic moments. These results demonstrate that the magnetic response of laser-ablated IONPs can be effectively tuned by controlling the aqueous medium and surface chemistry, without altering the crystalline core, offering a versatile and green strategy for designing iron oxide nanoparticles with tailored magnetic properties.
SN - 0022-3697
ER -