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Issue 2, 2014
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Size-dependent molecule-like to plasmonic transition in water-soluble glutathione stabilized gold nanomolecules

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Abstract

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 Au43(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.

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

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Publication details

The article was received on 16 Jul 2013, accepted on 18 Oct 2013 and first published on 22 Nov 2013


Article type: Communication
DOI: 10.1039/C3NR03657J
Citation: Nanoscale, 2014,6, 683-687
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    Size-dependent molecule-like to plasmonic transition in water-soluble glutathione stabilized gold nanomolecules

    N. Kothalawala, J. Lee West IV and A. Dass, Nanoscale, 2014, 6, 683
    DOI: 10.1039/C3NR03657J

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