Size-dependent molecule-like to plasmonic transition in water-soluble glutathione stabilized gold nanomolecules

作者：Kothalawala Nuwan; West James Lee; Dass Amala^*

来源：Nanoscale, 2014, 6(2): 683-687.

DOI：10.1039/c3nr03657j

A size-dependent transition from molecule-like to plasmonic behaviour is demonstrated in the case of water soluble Au:SG nanomolecules. This was achieved using PAGE separation of smaller and larger nanomolecules, resulting in an unprecedented 26 bands, in a wide-range from 10's to 1000's of Au-atoms. PAGE separation of larger plasmonic nanomolecules is demonstrated for the first time. High resolution ESI-MS, with isotopic resolution, of smaller nanoparticles is reported, including the first time report of Au-43(SG)(26). This report will aid in the fundamental understanding of size-dependent properties of nanomolecules. The synthetic procedure employs a green approach with non-toxic chemicals and processes. The water solubility, non-toxicity and biocompatibility will lead to applications in biomedicine.

• 出版日期2014