Search of new core materials for magnetic fluid hyperthermia: Preliminary chemical and physical issues

Pollert, E.; Veverka, Pavel; Veverka, M.; Kaman, Ondřej; Závěta, K.; Vasseur, Sébastien; Epherre, Romain; Goglio, Graziella; Duguet, Étienne

doi:10.1016/j.progsolidstchem.2009.02.001

Cited by 90 publications

(45 citation statements)

References 41 publications

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“…To achieve high heating rates, the coercivity of the material needs to be adjusted, with the technical restrictions imposed on the amplitude of the applied fi eld [22,23] . The coercivity of MNPs can be adjusted by control of NP size, shape and composition [24] and it depends on the temperature.…”

Section: Theorymentioning

confidence: 99%

“…The main disadvantage of simple iron oxides such, as magnetite and maghemite, is the diffi culty in precisely controlling their magnetic properties [22] . Mixed metal oxides (MMOs) can be obtained by …”

Section: Mixed Metal Oxidesmentioning

confidence: 99%

“…Magnetic fl uid hyperthermia utilizes locally introduced MNPs to convert RF fi eld energy into heat [22] . Hyperthermia involves heating cancer tumors to 42 -46 ° C and makes cancer cells more susceptible to chemotherapy or radiation.…”

Section: Biomedicalmentioning

confidence: 99%

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Application of alternative energy forms in catalytic reactor engineering

Houlding

Rebrov

2012

Green Processing and Synthesis

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This review provides a general overview of recent applications of magnetic nanoparticles for controlled radiofrequency (RF) heating in catalytic synthesis, mass transfer enhancement in laminar fl ow and magnetic separation. By directly delivering RF energy to magnetic materials, issues such as long heating periods and energy losses can be minimized. The main mechanisms of RF heating are briefl y reviewed. The effect of nanoparticles size, shape and composition on the effi ciency of RF heating is discussed. RF energy has been shown to be effective in many applications, however, it is still not used in chemicals due to high equipment costs.

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Section: Theorymentioning

confidence: 99%

Section: Mixed Metal Oxidesmentioning

confidence: 99%

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Application of alternative energy forms in catalytic reactor engineering

Houlding

Rebrov

2012

Green Processing and Synthesis

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“…compositions. [5][6][7][8] In this instance, La 3+ or Sr 2+ ions occupy the A-site and either Mn 3+ or Mn 4+ occupies the B-site. As found in a previous work by this group, an increase of the relative weight percentage of the orthorhombic (Pnma) crystalline phase is observed by increasing the strontium dopant in the LSMO synthesised using a modified peroxide sol-gel method.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterisation and study of magnetocaloric effects (enhanced and reduced) in manganate perovskites

McBride

Partridge

Bennington-Gray

et al. 2017

Materials Research Bulletin

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Highlights• La1-xCaxMnO3 and La1-xBaxMnO3 synthesised using the modified peroxide sol-gel synthesis.• Enhanced magnetic heating for manganates doped with A-site cations larger than La 3+ .• Reduced magnetic heating observed for manganates doped with A-site cations smaller than La 3+ . 1 AbstractThe effect of the A-site dopant ionic radii on the observed magnetocaloric effect (MCE) exhibited by three different families of manganese-based perovskites was investigated using both induction heating and SQUID magnetometry measurements. The doped perovskites La1-xSrxMnO3 (LSMO), La1-xCaxMnO3 (LCMO), and La1-xBaxMnO3 (LBMO) (x = 0.25, 0.35, 0.4) were prepared using a modified peroxide sol-gel synthesis. This method has not been previously used for the synthesis of LCMO or LBMO. Structural characterisation of the agglomerates of magnetic nanoparticles (MNP) for each material was carried out using SEM, XRD and IR spectroscopy. Magnetic heating was observed for materials with larger A-site dopant radii relative to La 3+ ; LSMO40 and LBMO40, with average SARs obtained of 51.5 Wg -1 Mn and 33.8Wg -1 Mn respectively. However, reduced magnetic heating effects were observed for smaller A-site dopant radii relative to La 3+ (LCMO). In fact, the calculated Specific Absorption Rate for LCMO40 of 14.72 Wg -1 Mn is half that of the blank.

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“…particle size) depending on the synthesis procedure and alternatively employing multiphase materials. These possibilities were discussed with several examples in our recent paper (Pollert et al 2009), where the position of La 1−x Sr x MnO 3 (LSMO) perovskites, offering exceptional feasibility, was stressed. Simultaneously, attention should be paid to the quality of the coating, ensuring stability of the suspension and biocompatibility, indispensable properties with respect to potential medical applications.…”

Section: Introductionmentioning

confidence: 99%

Core–shell La _{1−
x} Sr _x MnO ₃ nanoparticles as colloidal mediators for magnetic fluid hyperthermia

Pollert

Kaman

Veverka

et al. 2010

Phil. Trans. R. Soc. A.

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Core-shell nanoparticles consisting of La 0.75 Sr 0.25 MnO 3 cores covered by silica were synthesized by a procedure consisting of several steps, including the sol-gel method in the presence of citric acid and ethylene glycol, thermal and mechanical treatment, encapsulation employing tetraethoxysilane and final separation by centrifugation in order to get the required size fraction. Morphological studies revealed well-separated particles that form a stable water suspension. Magnetic studies include magnetization measurements and investigation of the ferromagnetic-superparamagnetic-paramagnetic transition. Magnetic heating experiments in 'calorimetric mode' were used to determine the heating efficiency of the particles in water suspension and further employed for biological studies of extracellular and intracellular effects analysed by tests of viability.

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Search of new core materials for magnetic fluid hyperthermia: Preliminary chemical and physical issues

Cited by 90 publications

References 41 publications

Application of alternative energy forms in catalytic reactor engineering

Application of alternative energy forms in catalytic reactor engineering

Synthesis, characterisation and study of magnetocaloric effects (enhanced and reduced) in manganate perovskites

Core–shell La _{1−
x} Sr _x MnO ₃ nanoparticles as colloidal mediators for magnetic fluid hyperthermia

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Search of new core materials for magnetic fluid hyperthermia: Preliminary chemical and physical issues

Cited by 90 publications

References 41 publications

Application of alternative energy forms in catalytic reactor engineering

Application of alternative energy forms in catalytic reactor engineering

Synthesis, characterisation and study of magnetocaloric effects (enhanced and reduced) in manganate perovskites

Core–shell La 1− x Sr x MnO 3 nanoparticles as colloidal mediators for magnetic fluid hyperthermia

Contact Info

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Core–shell La _{1−
x} Sr _x MnO ₃ nanoparticles as colloidal mediators for magnetic fluid hyperthermia