Emulsions stabilized by highly hydrophilic TiO2 nanoparticles via van der Waals attraction

Phase Inversion of Pickering Emulsions Induced by Interfacial Electrostatic Attraction

“…As reported previously, uncharged silica particles at their isoelectric point (IEP) can stabilize O/W emulsions via van der Waals attraction between particles and the oil−water interface. 37,38 100 nm Silica-RB particles are thus used to prepare such emulsions. At pH 2.5 (IEP), the O/W emulsion is stabilized by the adsorption of 100 nm silica-RB particles onto the interface, but 100 nm silica-FITC particles in the oil phase are not attracted to the interface (Figure S7).…”

Metabolic alterations in alga Chlamydomonas reinhardtii exposed to nTiO2 materials

“…Our previous kinetic study revealed that the micrometer aggregates of nTiO 2 settled down rapidly within the first 24 h and the percentage of the suspended particles tended to stay constant from 24 to 96 h. 43 The above observations are consistent with the fact that the nTiO 2 suspensions at higher concentrations are more susceptible to aggregation due to the increased collision probability between the particles. 63 It is currently accepted that the aggregation state of nTiO 2 suspensions is a result of the van der Waals attraction forces, 64 Coulomb repulsion caused by the surface charge of the particles or the action of the electrostatic double layer, and steric hindrance. 65 …”

“…Our previous kinetic study revealed that the micrometer aggregates of nTiO 2 settled down rapidly within the first 24 h and the percentage of the suspended particles tended to stay constant from 24 to 96 h. 43 The above observations are consistent with the fact that the nTiO 2 suspensions at higher concentrations are more susceptible to aggregation due to the increased collision probability between the particles. 63 It is currently accepted that the aggregation state of nTiO 2 suspensions is a result of the van der Waals attraction forces, 64 Coulomb repulsion caused by the surface charge of the particles or the action of the electrostatic double layer, and steric hindrance. 65 Effect of nTiO 2 treatments on algal physiology All three tested nTiO 2 materials induced growth inhibition in less than 50% of the exposed alga and the effect was Environmental Science: Nano Paper concentration dependent (Fig.…”

Nanovaccines against Animal Pathogens: The Latest Findings

“…Optimising several key factors such as particle size and stability can maximise water concentration, oil phase, and modes of carrying. This system is an efficient vaccine adjuvant for enhancing the adaptive response and many nanoemulsions have been proven safe [ 140 , 141 , 142 ]. There are other promising nanostructures such as nanosponges (very small sized and having a porous structure) or extracellular vesicles which are well suited as new delivery and/or immunomodulatory systems.…”