Control of silver-polymer aggregation mechanism by primary particle spatial correlations in dynamic fractal-like geometry

Abstract

Silver nanocrystals have been prepared by reacting silver nitrate with ascorbic acid in aqueous solution containing a low concentration of a commercial polynaphtalene sulphonate polymer (Daxad 19). Various crystalline morphologies have been obtained simply by tuning the reaction temperature. We have investigated the nanoparticle formation mechanism at three different temperatures by in situ and time resolved Small Angle X ray Scattering measurements. By modeling the scattering intensity with interacting spherical particles in a fractal-like polymer-Ag matrix, we found signatures of nucleation, growth and assembly of primary particles of about 15-20 nm. We observed how the time evolution of both spatial correlations between primary particles and the dynamic fractal geometry of the polymer-Ag matrix could influence and determine both the aggregation mechanism and the morphology of forming nanostructures in solution.

References in corpus (6)

• Scale-free correlations in bird flocks
• Scale-free structural organization of oxygen interstitials in La2CuO4+y
• Modeling Urban Growth Patterns with Correlated Percolation
• Power Law Scaling for a System of Interacting Units with Complex Internal Structure
• Simulation study of Non-ergodicity Transitions: Gelation in Colloidal Systems with Short Range Attractions
• Theory and simulation of gelation, arrest and yielding in attracting colloids

Cited by in corpus (2)

• Evolution of Complexity in Out-of-Equilibrium Systems by Time-Resolved or Space-Resolved Synchrotron Radiation Techniques
• 2D nano-granularity of the oxygen chains in the YBa2Cu3O6.33 superconductor