PVP encapsulated Au nanoparticles

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Polyvinylpyrrolidone (PVP):

The PVP here serves as a stabilizing group for nanoparticles. To minimize the surface tension, the polymer will attach to the gold core and gradually encapsulate around the surface of it. Finally, a polymer shell will be formed, which physically confines the size and motif of the gold particles.

This creates a wide variety of nanoparticle shapes and sizes.

Rational and Combinatorial Design of Peptide Capping Ligands for Gold Nanoparticles

Raphaël Lévy, Nguyen T. K. Thanh, R. Christopher Doty, Irshad Hussain, Richard J. Nichols, David J. Schiffrin, Mathias Brust, and David G. Fernig
Journal of the American Chemical Society 2004 126 (32), 10076-10084

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