AuNPs/colloidal synthesis

Hybrid organic-gold nanoparticles may be obtained essentially in two ways, that is, by formation of an organic layer around preformed AuNPs or colloids, and by synthesis of AuNPs in the presence of organic ligands such as thiols, amines, or phosphines. 

One year later, Brust and Schiffrin [28,29] published a method for AuNPs synthesis which has a considerable impact on the overall field in less than a decade because it allowed the facile synthesis of thermally stable and air-stable AuNPs of reduced dispersity and controlled size for the first time. In this method, the gold colloids are sterically stabilized by organic molecules having thiol, amide or acid groups in contrast to the citrate reduction method where the gold colloids are kinetically stabilized in aqueous solutions by an electrical double layer [28,29], The main advantage of the Brust method is that the gold particles behave in a way as chemical compounds. These AuNPs can be repeatedly isolated and... 

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