October 2008, Volume 1, Issue 4, pp 333-340,
Open Access This content is freely available online to anyone, anywhere at any time.
Date: 08 Apr 2010
Two distinct fluorescent quantum clusters of gold starting from metallic nanoparticles by pH-dependent ligand etching
Two fluorescent quantum clusters of gold, namely Au25 and Au8, have been synthesized from mercaptosuccinic acid-protected gold nanoparticles of 4–5 nm core diameter by etching with excess glutathione. While etching at pH ∼3 yielded Au25, that at pH 7–8 yielded Au8. This is the first report of the synthesis of two quantum clusters starting from a single precursor. This simple method makes it possible to synthesize well-defined clusters in gram quantities. Since these clusters are highly fluorescent and are highly biocompatible due to their low metallic content, they can be used for diagnostic applications.
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- Two distinct fluorescent quantum clusters of gold starting from metallic nanoparticles by pH-dependent ligand etching
- Open Access
- Available under Open Access This content is freely available online to anyone, anywhere at any time.
Volume 1, Issue 4 , pp 333-340
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- Gold cluster
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- Author Affiliations
- 1. DST Unit on Nanoscience (DST UNS), Department of Chemistry and Sophisticated Analytical Instrument Facility, Indian Institute of Technology Madras, Chennai, 600 036, India
- 2. Unit for Nanoscience and Technology, Department of Chemical, Biological and Macromolecular Sciences, Satyendra Nath Bose National Centre for Basic Sciences, Block JD, Sector III, Salt Lake, Kolkata, 700 098, India