Starch Sodium Octenylsuccinate as a New Type of Stabilizer in the Synthesis of Catalytically Active Gold Nanostructures.

Here, starch derivatives, i.e., sodium starch octenylsuccinate (OSA starch, hereinafter referred to as OSA), were employed as both reducing and stabilizing agents for the unique, inexpensive, and simple synthesis of gold nanoparticles (OSA-AuNPs) in an aqueous solution with gold salt.

Synthesis of dextrin-stabilized colloidal silver nanoparticles and their application as modifiers of cement mortar.

Various commercial dextrins were used as reducing and stabilizing agents for a novel one-step synthesis of silver nanoparticles from ammonia complexes of silver ions. As a result, stable colloids of silver were formed during the reaction with the particle size being the function of the dextrin type. The obtained colloids were characterized by UV-vis spectrophotometry, size distribution (using Non-Invasive Backscatter optics) and transmission electron microscopy (TEM).

Lignosulfonate-stabilized selenium nanoparticles and their deposition on spherical silica.

We report a novel room-temperature synthesis of selenium nanoparticles, which for the first time uses lignosulfonate as a stabilizer. Various lignosulfonates obtained both from hardwood and softwood were tested. Selenium oxide was used as the precursor of zero-valent selenium.

Functionalization of organically modified silica with gold nanoparticles in the presence of lignosulfonate.

It is shown that lignosulfonate (LS) can be used as an effective reducing agent for gold ions and simultaneously as a stabilizing agent for gold nanoparticles (AuNPs). When organically modified silica is introduced to the reaction mixture, most of the AuNPs grow on the surface of the silica due to hydrophobic interactions between LS and organic layers covering the solid particles. It was also found that the structure of the organic layer is crucial for the effective deposition of gold nanoparticles onto silica spheres in terms of particle size and gold content in the final SiO2-LS-AuNPs composites.

Electrokinetic and bioactive properties of CuO∙SiO2 oxide composites.

CuO∙SiO(2) hybrid oxide precipitated on a semi-technical scale was thoroughly characterised in terms of physicochemical properties. Its particle size distribution and SEM analysis were performed to establish dispersion and surface morphology. Chemical analysis provided information on the content of CuO and SiO(2) oxides in the hybrid systems.