Modeling particle scattering structure factor for branched bio-inspired polymers in solution: A small angle X-rayscattering study.

We present a study which illustrates the modeling of the Particle Scattering Structure Factor of an hyperbranched biopolymer in water solution using the Small Angle X-ray Scattering (SAXS) data.The studied sample was a sodium carboxilate terminated poly(amidoamine) dendrimer (generation2.5) dispersed in wate rmedium. The experimental inter-endrimer structure factor S(q) has been analyzed in the framework of liquid integral equation theory for charged systems in solution. From that, we derive an effective interparticle interaction composed of a screened Coulombic plushard-sphere repulsion potential, which allows the estimation of the dendrimer effective charge Zeff. The present analysis strongly supports the finding that structures and interaction of dendrimer are strongly influenced by charge effects. As a result, this quantity can be considered as a crucial parameter for the modulation of the degree of structural organization in solution, suitable for a number of potential applications. We conclude our form factor analysis with the investigation of the long-range assembly conditions during the growth of the intermediate nano aggregates generated by the inclusion of aluminosilicate components of zeolite 13X on the surface of dendrimers.