PMAO-assisted thermal decomposition synthesis of high-stability ferrofluid based on magnetite nanoparticles for hyperthermia and MRI applications

Vuong, Thi Kim Oanh; Le, The Tam; Doan, Huong Thi Thanh; Nguyen, Xuan Truong; Nguyen, X.C.; Vu, Thi Thu Ha; Le, Trong Lu; Tran, Dai Lam

doi:10.1016/j.matchemphys.2020.122762

Cited by 23 publications

(9 citation statements)

References 46 publications

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“…Thermal decomposition is one of the most preferable methods for the synthesis of CDs, which involves the carbonization or pyrolysis of the large-sized carbonaceous precursors under higher temperatures [104,132]. The benefits of using this method reside in the mass production of CDs, cost-effectiveness, lesser reaction time, broader tolerance of precursors, solvent-free strategies, and easy synthesis [104,133].…”

Section: Thermal Methodsmentioning

confidence: 99%

Carbon Dots: Classification, Properties, Synthesis, Characterization, and Applications in Health Care—An Updated Review (2018–2021)

2021

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Carbon dots (CDs) are usually smaller than 10 nm in size, and are meticulously formulated and recently introduced nanomaterials, among the other types of carbon-based nanomaterials. They have gained significant attention and an incredible interest in the field of nanotechnology and biomedical science, which is merely due to their considerable and exclusive attributes; including their enhanced electron transferability, photobleaching and photo-blinking effects, high photoluminescent quantum yield, fluorescence property, resistance to photo-decomposition, increased electrocatalytic activity, good aqueous solubility, excellent biocompatibility, long-term chemical stability, cost-effectiveness, negligible toxicity, and acquaintance of large effective surface area-to-volume ratio. CDs can be readily functionalized owing to the abundant functional groups on their surfaces, and they also exhibit remarkable sensing features such as specific, selective, and multiplex detectability. In addition, the physico-chemical characteristics of CDs can be easily tunable based on their intended usage or application. In this comprehensive review article, we mainly discuss the classification of CDs, their ideal properties, their general synthesis approaches, and primary characterization techniques. More importantly, we update the readers about the recent trends of CDs in health care applications (viz., their substantial and prominent role in the area of electrochemical and optical biosensing, bioimaging, drug/gene delivery, as well as in photodynamic/photothermal therapy).

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Section: Thermal Methodsmentioning

confidence: 99%

Carbon Dots: Classification, Properties, Synthesis, Characterization, and Applications in Health Care—An Updated Review (2018–2021)

2021

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“…For instance, IONPs of size 83.54 mm synthesized by thermal decomposition (298 °C), using iron(III) acetylacetonate and Fe(acac) 3 coated with PMAO, produced a steric barrier that can limit the precipitation of IONPs. These NPs have a polydispersity index (PDI) of 0.19 and a zeta potential of −40.9 mV 6 months after being synthesized . As reported, PMAO provides ferrofluids great stability for half a year.…”

Section: Synthesis Of Ferrofluidsmentioning

confidence: 96%

“…Thermal decomposition is a method for preparing IONPs via the decomposition of iron precursors (Table ), commonly iron carbonyls − and organometallics. , The most common precursor is iron pentacarbonyl [Fe(CO) 5 ], a relatively toxic compound that when decomposed in a reducing environment, such as an inert gas flow, will produce magnetite. , Another common iron precursor is Fe(C 5 H 7 O 2 ) 3 , which is often abbreviated Fe(acac) 3 . ,,, Thermal decomposition is chosen over coprecipitation when a greater control over IONP size is required . Size is controlled in thermal decomposition by a multitude of factors but primarily by the molar ratio of the iron precursor and surfactant.…”

Section: Synthesis Of Ferrofluidsmentioning

confidence: 99%

Approaches on Ferrofluid Synthesis and Applications: Current Status and Future Perspectives

et al. 2022

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Ferrofluids are colloidal suspensions of iron oxide nanoparticles (IONPs) within aqueous or nonaqueous liquids that exhibit strong magnetic properties. These magnetic properties allow ferrofluids to be manipulated and controlled when exposed to magnetic fields. This review aims to provide the current scope and research opportunities regarding the methods of synthesis of nanoparticles, surfactants, and carrier liquids for ferrofluid production, along with the rheology and applications of ferrofluids within the fields of medicine, water treatment, and mechanical engineering. A ferrofluid is composed of IONPs, a surfactant that coats the magnetic IONPs to prevent agglomeration, and a carrier liquid that suspends the IONPs. Coprecipitation and thermal decomposition are the main methods used for the synthesis of IONPs. Despite the fact that thermal decomposition provides precise control on the nanoparticle size, coprecipitation is the most used method, even when the oxidation of iron can occur. This oxidation alters the ratio of maghemite/magnetite, influencing the magnetic properties of ferrofluids. Strategies to overcome iron oxidation have been proposed, such as the use of an inert atmosphere, adjusting the Fe(II) and Fe(III) ratio to 1:2, and the exploration of other metals with the oxidation state +2. Surfactants and carrier liquids are chosen according to the ferrofluid application to ensure stability. Hence, a compatible carrier liquid (polar or nonpolar) is selected, and then, a surfactant, mainly a polymer, is embedded in the IONPs, providing a steric barrier. Due to the variety of surfactants and carrier liquids, the rheological properties of ferrofluids are an important response variable evaluated when synthesizing ferrofluids. There are many reported applications of ferrofluids, including biosensing, medical imaging, medicinal therapy, magnetic nanoemulsions, and magnetic impedance. Other applications include water treatment, energy harvesting and transfer, and vibration control. To progress from synthesis to applications, research is still ongoing to ensure control of the ferrofluids’ properties.

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“…In addition, the modification of the nanoparticles' surface is fundamental to ensure good colloidal stability and modulate the interparticle distance through the formation of clusters. Therefore, several stabilizers have been proposed in the literature, such as bonding of hydrophilic molecules to the NPs' surface, such as dimercaptosuccinic acid (DMSA), 35–39 functionalized silanes, 40–42 and carboxylic acids, 37,43–46 encapsulation of NPs in polymers such as dextran, 47–49 polyethylene glycol (PEG), 50–52 polyacrylic acid, 53–56 biopolymers, 57–60 etc. (Table 1S † ).…”

Section: Introductionmentioning

confidence: 99%

Effect of different molecular coatings on the heating properties of maghemite nanoparticles

et al. 2022

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PMAO-assisted thermal decomposition synthesis of high-stability ferrofluid based on magnetite nanoparticles for hyperthermia and MRI applications

Cited by 23 publications

References 46 publications

Carbon Dots: Classification, Properties, Synthesis, Characterization, and Applications in Health Care—An Updated Review (2018–2021)

Carbon Dots: Classification, Properties, Synthesis, Characterization, and Applications in Health Care—An Updated Review (2018–2021)

Approaches on Ferrofluid Synthesis and Applications: Current Status and Future Perspectives

Effect of different molecular coatings on the heating properties of maghemite nanoparticles

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