Role of coating agent in iron oxide nanoparticle formation in an aqueous dispersion: Experiments and simulation

Bachhar, Nirmalya; Bandyopadhyaya, Rajdip

doi:10.1016/j.jcis.2015.11.006

Cited by 10 publications

(23 citation statements)

References 28 publications

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“…We have developed a mechanistic model and carried out kinetic Monte Carlo simulation to understand the growth kinetics of the NPs following our previous work. [27] Our simulation data matched the mean of the particle size distribution (PSD) obtained from analysing the TEM images of SNPs presented in this work. The details of the simulation are reported in the SI (Sect.…”

Section: Growth Kineticssupporting

confidence: 73%

Magnetic Nanoparticles to Unique DNA Tracers – Effect of Functionalization on Physico-Chemical Properties.

Sharma¹,

Foppen

Banerjee³

et al. 2020

Preprint

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Limited number of potential tracers such as salts, isotopes and dyes, make study of hydrological processes a challenge. Traditional tracers find limited use due to lack of multipoint tracing and background noise, among others. DNA based tracers have been shown to have great potential enabling synthesis of ideally unlimited number of unique tracers besides being environmentally friendly, highly sensitive and capable of multipoint tracing. To prevent unintentional losses in the environment during application and easy recovery for analysis, we hereby report DNA encapsulation in silica containing magnetic cores (iron oxide) of two different shapes – spheres and cubes, in the size range 10-20 nm, synthesized using co-precipitation or thermal decomposition. Physico-chemical properties such as size, zeta potential, etc of the iron oxide nanoparticles have been optimized for different ligands and surfactants. We report for the first time the effect of surface coating on the magnetic properties of the iron oxide nanoparticles at each stage of functionalization, culminating in silica shells. Efficiency of encapsulation of three different dsDNA molecules has been studied using quantitative polymerase chain reaction (qPCR). Our results show that our DNA based magnetic tracers can be used for hydrological monitoring with easy recoverability and high signal amplification.

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Section: Growth Kineticssupporting

confidence: 73%

Magnetic Nanoparticles to Unique DNA Tracers – Effect of Functionalization on Physico-Chemical Properties.

Sharma¹,

Foppen

Banerjee³

et al. 2020

Preprint

Self Cite

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show abstract

“…We have developed a mechanistic model and carried out kinetic Monte Carlo simulation to understand the growth kinetics of the NPs following our previous work [30]. Our simulation data matched the mean of the particle size distribution (PSD) obtained from analysing the TEM images of SNPs presented in this work.…”

Section: Growth Kineticsmentioning

confidence: 66%

Magnetic Nanoparticles to Unique DNA Tracers: Effect of Functionalization on Physico-chemical Properties

et al. 2021

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To monitor and manage hydrological systems such as brooks, streams, rivers, the use of tracers is a well-established process. Limited number of potential tracers such as salts, isotopes and dyes, make study of hydrological processes a challenge. Traditional tracers find limited use due to lack of multiplexed, multipoint tracing and background noise, among others. In this regard, DNA based tracers possess remarkable advantages including, environmentally friendly, stability, and high sensitivity in addition to showing great potential in the synthesis of ideally unlimited number of unique tracers capable of multipoint tracing. To prevent unintentional losses in the environment during application and easy recovery for analysis, we hereby report DNA encapsulation in silica containing magnetic cores (iron oxide) of two different shapes—spheres and cubes. The iron oxide nanoparticles having size range 10–20 nm, have been synthesized using co-precipitation of iron salts or thermal decomposition of iron oleate precursor in the presence of oleic acid or sodium oleate. Physico-chemical properties such as size, zeta potential, magnetism etc. of the iron oxide nanoparticles have been optimized using different ligands for effective binding of dsDNA, followed by silanization. We report for the first time the effect of surface coating on the magnetic properties of the iron oxide nanoparticles at each stage of functionalization, culminating in silica shells. Efficiency of encapsulation of three different dsDNA molecules has been studied using quantitative polymerase chain reaction (qPCR). Our results show that our DNA based magnetic tracers are excellent candidates for hydrological monitoring with easy recoverability and high signal amplification. Graphic Abstract

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“…13 This nucleation is followed by diffusional and coagulation growth. 13 Organic substances that are already present during co-precipitation act as stabilizers of the nanoparticles and inhibit coagulation growth by binding on the surface via ligand exchange reactions, hydrogen bonding, and/or electrostatic attraction forces. 12,13 While in our synthesis gum arabic was only dissolved shortly before drying, inulin and mannitol were present during the synthesis.…”

Section: Resultsmentioning

confidence: 99%

“…13 Organic substances that are already present during co-precipitation act as stabilizers of the nanoparticles and inhibit coagulation growth by binding on the surface via ligand exchange reactions, hydrogen bonding, and/or electrostatic attraction forces. 12,13 While in our synthesis gum arabic was only dissolved shortly before drying, inulin and mannitol were present during the synthesis. For this reason, we suspect that inulin and mannitol inuence the structure formation so strongly that larger, regular iron(oxyhydr)oxide nuclei cannot be formed.…”

Section: Resultsmentioning

confidence: 99%

“…12 Thus, Bachhar et al observed smaller particle sizes when magnetite was coated with polyacrylic acid or dextran in comparison to uncoated nanoparticles. 13 Eusterhues et al reported a decrease in particle size for ferrihydrite in presence of organic matter in comparison to organic-free ferrihydrite. 14 In addition, organic molecules can inuence the crystal arrangement in iron(oxyhydr)oxides.…”

Section: Introductionmentioning

confidence: 98%

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Characterization of an active ingredient made of nanoscale iron(oxyhydr)oxide for the treatment of hyperphosphatemia

et al. 2021

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Role of coating agent in iron oxide nanoparticle formation in an aqueous dispersion: Experiments and simulation

Cited by 10 publications

References 28 publications

Magnetic Nanoparticles to Unique DNA Tracers – Effect of Functionalization on Physico-Chemical Properties.

Magnetic Nanoparticles to Unique DNA Tracers – Effect of Functionalization on Physico-Chemical Properties.

Magnetic Nanoparticles to Unique DNA Tracers: Effect of Functionalization on Physico-chemical Properties

Characterization of an active ingredient made of nanoscale iron(oxyhydr)oxide for the treatment of hyperphosphatemia

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