Stabilization of spherical nanoparticles of iron(III) hydroxides in aqueous solution by wormlike micelles

Abstract

DLS revealed higher scattering contrast and slower diffusion for wormlike micelles in the presence of nanoparticles. These results were interpreted as the decoration of the chains of wormlike micelles by nanoparticles of Fe(OH). A pearl-necklace model was successfully used to adjust SAXS curves, revealing nanoparticles with ∼3 nm of diameter, spaced ∼2 nm apart along the string. This result agrees with TEM and Cryo-TEM images. The formed structure prevents the coagulation of nanoparticles, assuring high stability to the dispersion.

Potential of Gum Arabic Functionalized Iron Hydroxide Nanoparticles Embedded Cellulose Paper for Packaging of Paneer

“…These coalesce iron molecules transformed into small visual aggregates. Our results are well in line with the findings of [ 26 ] who observed the formulation of large nuclei during the synthesis of iron hydroxide nanoparticles in the presence of alkali medium. Furthermore, large nucleation and aggregation in IHNPs decrease the unique properties and applications of the nanostructures.…”

Gum Arabic-Stabilized Ferric Oxyhydroxide Nanoparticles for Efficient and Targeted Intestinal Delivery of Bioavailable Iron

“…However, no iron was detected in the 3 kDa filtrates of sample solutions (Figure S1), indicating the absence of low-molecular-weight soluble complexes. In fact, Fe 3+ is known to undergo prompt hydrolysis at neutral pH into ferric oxyhydroxide, which has a solubility product constant as low as 3 × 10 –38 at 298 K and a quite low critical coagulation concentration of 3 –6 according to the Schulze-Hardy rule . Therefore, after filtration of the dispersion through 0.45 μm filters, it is no wonder for the characteristic broad absorption band of ferric oxyhydroxide in the range of 250–500 nm to entirely disappear (Figure a) .…”

“…In fact, Fe 3+ is known to undergo prompt hydrolysis at neutral pH into ferric oxyhydroxide, which has a solubility product constant as low as 3 × 10 −38 at 298 K and a quite low critical coagulation concentration of 3 −6 according to the Schulze-Hardy rule. 21 Therefore, after filtration of the dispersion through 0.45 μm filters, it is no wonder for the characteristic broad absorption band of ferric oxyhydroxide in the range of 250−500 nm to entirely disappear (Figure 1a). 22 When GAs were present in the MOPS buffer, 0.45 μm filtration could not reduce the absorption intensity of ferric oxyhydroxide, validating the formation of GA-stabilized soluble polymers of ferric oxyhydroxide.…”

Urchin-like SiO2 Nanospheres for Enhancing the Performance of Clean Fracturing Fluids

“…In recent years, surfactants have attracted considerable research attention and found a wide range of applications in various fields, such as cosmetic manufacturing, 6,7 biopharmaceuticals, 8,9 and material synthesis. 10,11 Among micelles, wormlike micelles are widely used as clean fracturing fluids in oil stimulation owing to their unique viscoelasticity. 12 When counterions are added to surfactant solutions, these micelles lengthen and with increasing micelle concentration, overlap and twist around each other to form a three-dimensional network structure, which not only is stronger but also substantially increases the solution viscosity.…”

“…With increasing surfactant concentration, more variable self-assembled structures, such as rods, worms, vesicles, and lamellae, form , and endow surfactants with even more application potential. In recent years, surfactants have attracted considerable research attention and found a wide range of applications in various fields, such as cosmetic manufacturing, , biopharmaceuticals, , and material synthesis. , …”