Complexation of silver clusters of a few atoms by a polyanion in aqueous solution: pH effect correlated to structural changes

Au(III)–PAMAM Interaction and Formation of Au–PAMAM Nanocomposites in Ethyl Acetate

“…The stabilizers not only protect the nanoparticles from coagulation but also control the size of the metal particles in the course of synthesis. Poly (Nvinyl-2-pyrrolidone) (PVP) (14)(15)(16), poly(ethyleneimine) (PEI) (17,18), and poly(acrylic acid) (PAA) (19,20) are known as excellent stabilizers. By using these linear polymers small metal nanoparticles of less than 2 nm in diameter can be prepared.…”

Kinetics of cluster growth by aggregation

“…For example pulse radiolysis or laser photolysis provides a way to generate quasi instantaneously in solution a population of isolated metal atoms and then to follow their reactions up to the emergence of colloidal particles [14][15][16][17][18][19]. The early steps of the formation, even fast, can be represented by a model of coalescence and growth by chemical reactions.…”

“…The early steps of the formation, even fast, can be represented by a model of coalescence and growth by chemical reactions. The influence of the initial concentration of atoms [14], of excess ions [14], of the ionic strength [15,16], of the polarity of the solvent [17], of a surfactant [15], or of a ligand [18,19] has been studied. The kinetics observed result both from the variation with time of the entire population of aggregates distributed over all sizes and from the dependence of the observed property (for example optical absorption) on the cluster nuclearity.…”

Kinetics of Ag+ contained polymeric complex membranes for facilitated olefin transport

“…The sample of poly(acrylic acid) -Ag / for IR the oxygen atoms and the Ag / ion. 21 Figure 1 presents the IR spectra of the PAA and the PAAand NMR spectra was prepared as follows: a poly-(acrylic acid)/water (3.6 g/15 mL) solution was Ag / . The OH band absorption seems to remain unchanged and the C|O band absorption at 1715 mixed with a silver nitrate/water (8.5 g/10 mL) solution for preparation the sample with COOH/ cm 01 shifts to a lower wavenumber of 1709 cm 01 .…”