Preparing water-dispersed palladium nanoparticles via polyelectrolyte nanoreactors

The role of nanoparticle size and ligand coverage in size focusing of colloidal metal nanoparticles

“…where DH 0-L is the enthalpy of reaction at zero coverage, C L the constant which varies depending on the type of chemical reaction (C L is the slope of eqn (17) and can be obtained by measuring DH at different coverages). 90 Substituting eqn (17) into (16), the activation energy for ligand-nanoparticle binding can be obtained via the following relationship:…”

“…91,92 Based on eqn (18) and 20, the activation energies of ligandnanoparticle binding and nanoparticle growth increase as the ligand coverage increases (E a-fL (q) ¼ E a-L0 À a L DH 0-L C L q; k f and k growth decrease accordingly since k f exp(ÀE a /RT)). We estimated C L (in eqn (17):…”

“…[1][2][3][4][5][6] For example, recent synthetic methods enabled fabrication of colloidal nanoparticles with different sizes by simply altering the reaction conditions (solvent, ligand, precursor, and synthesis temperature). [7][8][9][10][11] However, since the size distribution of the nanoparticles is oen key to their specic, desired physical and chemical properties, [12][13][14][15][16][17][18] a fundamental understanding of how to control the nucleation and growth is key to enable predictive synthesis of nanoparticles with the desired properties. To date, different models and mechanisms have been proposed to describe the nucleation and growth of colloidal nanoparticles as well as size focusing and defocusing.…”

Versatile electrostatic assembly of nanoparticles and polyelectrolytes: Coating, clustering and layer-by-layer processes

“…The choice of the PEs is dictated by the charge of the metal ions, which need to be oppositely charged to facilitate the chain condensation. During the last 2 years, this technique was successfully applied to copper [6], palladium [7] and gold [8] NPs using PAA and carboxylate-based chains. Polycations such as PDADMAC, PEI and PAH were also utilized for the synthesis of platinum [9] or lead sulfide [10].…”

Nano‐Composites for Water Remediation: A Review

“…Surfactants or polymers can be added to the NP surfaces to encourage steric hindrance and alter the surface charge to prevent electrostatic attraction. The NPs can also be incorporated into other mobile structures such as carbon forms, silica and colloidal clays .…”