Nano Archive

Two distinct fluorescent quantum clusters of gold starting from metallic nanoparticles by pH-dependent ligand etching

Habeeb Muhammed, Madathumpady Abubaker and Ramesh, Subramani and Sinha, Sudarson Sekhar and Pal, Samir Kumar and Pradeep, Thalappil (2008) Two distinct fluorescent quantum clusters of gold starting from metallic nanoparticles by pH-dependent ligand etching. Nano Research, 1 (4). pp. 333-340.

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Official URL: http://www.springerlink.com/content/252697547k331v...

Abstract

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.

Item Type:Article
Uncontrolled Keywords:Gold cluster - glutathione - pH - ligand etching - fluorescence
Subjects:Material Science > Nanochemistry
Material Science > Nanostructured materials
Biomedical Science > Nanomedicine
ID Code:8844
Deposited By:IoN
Deposited On:23 Apr 2010 11:41
Last Modified:23 Apr 2010 11:41

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