Towards the design of contrast-enhanced agents: systematic Ga³⁺ doping on magnetite nanoparticles

Abstract

The main objective of the preparation of the system Fe3-xGaxO4 (0.14  x  1.35) is to further the knowledge of the magnetic response of Ga3+ doped magnetite for the...

Magnetically activated 3D printable polylactic acid/polycaprolactone/magnetite composites for magnetic induction heating generation

“…Interestingly, these superparamagnetic nanostructures have been extensively applied in several technological areas with special emphasis on biomedical applications [25][26][27]. In this aim, superparamagnetic NPs are proposed as contrast agents, image tracers, or local drug carriers due to their high biocompatibility, high magnetic response, and low-cost [28][29][30]. However, many of these potential uses rely on their ability to absorb energy from an externally applied alternating (AC) magnetic field [31].…”

“…Although a few works have studied the possibility to manufacture composites for heat generation, they are based on much more expensive polymers or ceramic materials [16,37,[37][38][39]. On the other hand, studies of PLA + Fe 3 O 4 [27], PCL + Fe 3 O 4 [28], and PLA + PCL [29] can be found in the literature, but the PLA + PCL + Fe 3 O 4 ternary composite for heat generation is the first time reported in literature.…”

Structural and Thermomagnetic Properties of Gallium Nanoferrites and Their Influence on Cells In Vitro

“…Considering the neutron mean measurements and relaxation times, the anisotropy constant [ 45 ], and the sphere radius, the appropriate T B 1 values listed in column 5 were determined. The second approach uses the individual anisotropy constants of nearly isostructural gallium ferrites [ 26 ]. Here, the T B 2 the values are systematically higher (see column 6 of Table 2 ), which indicates the determining influence of the shell and the coating agent.…”

“…Because of their simple crystal structure and high tendency to form homogeneous compounds, gallium-modified magnetites represent an ideal system to study the influence of ionic order on the thermomagnetic features of nanoparticles [ 26 ]. A large family of ferrite binary oxides with the spinel structure (Fd-3m no.…”

“…The gallium doping of Fe 3 O 4 may be a simple route of tuning magnetic properties, with direct consequences on superparamagnetic behavior. Gallium-doped magnetite nanoparticles are soft magnetic materials with a phase transition temperature above 350 K [ 26 ]. Therefore, it was decided to use the properties of gallium as an admixture of nanoferrites in the presented studies.…”