Synthesis and characterization of zinc substituted magnetite nanoparticles and their application to magneto-motive ultrasound imaging

Hadadian, Yaser; Sampaio, Diego R. T.; Ramos, Ana Paula; Carneiro, Antônio Adilton Oliveira; Mozaffari, M.; Cabrelli, Luciana C.; Pavan, Theo Z.

doi:10.1016/j.jmmm.2018.05.069

Cited by 36 publications

(56 citation statements)

References 75 publications

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“…In magnetite, for example, this weakens the antiferromagnetic coupling between iron cations distributed on both tetrahedral and octahedral sites; therefore, resulting in higher saturation magnetization of the composition. However, by further increase of zinc content, exchange interactions within the octahedral sites would be dominant, leading to spin canting and a decrease in the magnetization of the system 32,37 .…”

Section: Introductionmentioning

confidence: 99%

“…It has been shown in several studies that by increase zinc content in ferrites, nanoparticle sizes decrease systematically due to obstructing the crystal growth in spinel structure 38,39 . On the other hand the lattice parameter increases by addition of zinc, mostly due to the site occupancy preference and the difference between the ionic radius of zinc and Fe 3+ cations in tetrahedral sites 32,39,40 . These changes can, consequently, affect other characteristics of the host nanoparticles such as Curie temperature, blocking temperature, and anisotropy constant 32,41,42 .…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand the lattice parameter increases by addition of zinc, mostly due to the site occupancy preference and the difference between the ionic radius of zinc and Fe 3+ cations in tetrahedral sites 32,39,40 . These changes can, consequently, affect other characteristics of the host nanoparticles such as Curie temperature, blocking temperature, and anisotropy constant 32,41,42 . Therefore, zinc has always been regarded as a promising candidate to tune the magnetic properties of ferrite nanoparticles for biomedical applications, especially for magnetic hyperthermia 25,28,33–35,42–46 .…”

Section: Introductionmentioning

confidence: 99%

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Role of zinc substitution in magnetic hyperthermia properties of magnetite nanoparticles: interplay between intrinsic properties and dipolar interactions

Hadadian

Ramos

Pavan

2019

Sci Rep

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Optimizing the intrinsic properties of magnetic nanoparticles for magnetic hyperthermia is of considerable concern. In addition, the heating efficiency of the nanoparticles can be substantially influenced by dipolar interactions. Since adequate control of the intrinsic properties of magnetic nanoparticles is not straightforward, experimentally studying the complex interplay between these properties and dipolar interactions affecting the specific loss power can be challenging. Substituting zinc in magnetite structure is considered as an elegant approach to tune its properties. Here, we present experimental and numerical simulation results of magnetic hyperthermia studies using a series of zinc-substituted magnetite nanoparticles (ZnxFe1-xFe2O4, x = 0.0, 0.1, 0.2, 0.3 and 0.4). All experiments were conducted in linear regime and the results were inferred based on the numerical simulations conducted in the framework of the linear response theory. The results showed that depending on the nanoparticles intrinsic properties, interparticle interactions can have different effects on the specific loss power. When dipolar interactions were strong enough to affect the heating efficiency, the parameter σ = KeffV/kBT (Keff is the effective anisotropy and V the volume of the particles) determined the type of the effect. Finally, the sample x = 0.1 showed a superior performance with a relatively high intrinsic loss power 5.4 nHm2kg−1.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Role of zinc substitution in magnetic hyperthermia properties of magnetite nanoparticles: interplay between intrinsic properties and dipolar interactions

Hadadian

Ramos

Pavan

2019

Sci Rep

Self Cite

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“…As it has been shown in previous studies [94,95] magnetization of magnetic nanoparticles plays a key role in MMUS imaging. This factor was also a significant aspect for SDMMUS experiments in this thesis.…”

Section: 3: Evaluating Phantoms For Sdmmus Imagingmentioning

confidence: 53%

“…The first in vivo measurements of this group [94] was reported by Pulsed MMUS using superparamagnetic zinc substituted magnetite nanoparticles with enhanced magnetic saturation as a contrast agent and improved the signal to noise ratio (SNR). Lately, zinc substituted magnetite nanoparticles prepared with coprecipitation method was used for MMUS imaging in tissue-mimicking oil-based gel phantoms and the crucial role of magnetization was demonstrated [95]. Moreover, the MMUS technique has also been combined with photoacoustic imaging [96].…”

Section: Application Of Mmusmentioning

confidence: 99%

Evaluation of magnetic nanoparticle as magneto-motive ultrasound imaging constrast

Arsalani¹,

Carneiro²

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First of all, I would like to thank God because of helping me in all aspects of my life. I would like to express my deep gratitude to my advisor, Dr. Antonio Adilton Oliveira Carneiro for his valuable advice, guidance and endless inspiration during my project. He has been an invaluable mentor, who helped me in doing a lot of research and I learnt a lot working with him, I am really thankful to him. My special and sincere thanks to my best colleague, Yaser Hadadian, for his untiring supports and suggestions whenever I need his help. I would like to mention about our countless talk and discussion related to my project. Many thanks to another colleague, Diego Sampaio for being always helpful and suggesting great ideas. Moreover, I am also thankful to the other colleagues Luciana, Felipe and Guilherme to make me feel welcome and for providing a good environment during these two years. Moreover, I would like to thank to Dr. Theo Pavan and Oswaldo Baffa Filho for all their supports and kindness. Also, I also thank to our technician in GIIMUS, Agnelo Bastos, for all his guidance and patience during my experiments. I am also thankful from Nilza and Ricardo for all necessary information and suggestions have given for doing the process of my defense. Furthermore, I am grateful to my friends such as Alejandro, Iara, Kleython, Mehran, Leo, Breno and David for their encouragement, understanding, and patience even during hard times of this studies. Also, they have provided me with great memories. Lastly, I would like to thank my family for their unconditional support, love and encouragement, not only with my education but in all aspects of my life. Many thanks to all my sisters and my brother for always being by my side and believing in me. Especially my sister, Sudi, for her caring and kindness as well as kept me motivated to do always the best I could. I couldn't have done it without her.

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Enhancing magnetic hyperthermia in ferrite nanoparticles through shape anisotropy and surface hybridization

et al. 2021

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Magnetic hyperthermia has been studied for the past two decades in cancer treatments as the local heat generated by magnetic nanoparticles under applied alternating magnetic fields is sufficient to kill cancer cells. More recently, it has been explored for controlling biological signaling through heat-sensitive transmembrane channels. It is of great interest to produce magnetic nanoparticles with high heat transducing efficiency to minimize potential off-target heating effects. Here, we describe shape anisotropy and particle hybridization as possible routes to augment magnetic hyperthermia in ferrite nanoparticles. Zinc substituted magnetite core and core-shell cubic nanoparticles with different sizes were synthetized. It was found that nanoparticles shape and composition are altered from cubic to flower-like, and to a more franklinite rich phase as size increased. Hybridization with a cobalt shell allowed to enhance nanoparticle magnetic coercivity and specific power loss. The optimized core-shell nanoparticles were tested to induce cellular activity in hippocampal neurons.

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Synthesis and characterization of zinc substituted magnetite nanoparticles and their application to magneto-motive ultrasound imaging

Cited by 36 publications

References 75 publications

Role of zinc substitution in magnetic hyperthermia properties of magnetite nanoparticles: interplay between intrinsic properties and dipolar interactions

Role of zinc substitution in magnetic hyperthermia properties of magnetite nanoparticles: interplay between intrinsic properties and dipolar interactions

Evaluation of magnetic nanoparticle as magneto-motive ultrasound imaging constrast

Enhancing magnetic hyperthermia in ferrite nanoparticles through shape anisotropy and surface hybridization

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