Two Distinct Fluorescent Quantum Clusters of Gold Starting from Metallic Nanoparticles by pH-Dependent Ligand Etching

被引：149

作者：

Muhammed, Madathumpady Abubaker Habeeb ^{[1
,2
]}

Ramesh, Subramani ^{[1
,2
]}

Sinha, Sudarson Sekhar ^{[3
]}

Pal, Samir Kumar ^{[3
]}

Pradeep, Thalappil ^{[1
,2
]}

机构：

[1] Indian Inst Technol, DST Unit Nanosci DST UNS, Dept Chem, Madras 600036, Tamil Nadu, India

[2] Indian Inst Technol, Sophisticated Analyt Instrument Facil, Madras 600036, Tamil Nadu, India

[3] Satyendra Nath Bose Natl Ctr Basic Sci, Unit Nanosci & Technol, Dept Chem Biol & Macromol Sci, Kolkata 700098, India

来源：

NANO RESEARCH | 2008年 / 1卷 / 04期

关键词：

Gold cluster; glutathione; pH; ligand etching; fluorescence;

D O I：

10.1007/s12274-008-8035-2

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Two fluorescent quantum clusters of gold, namely Au-25 and Au-8, have been synthesized from mercaptosuccinic acid-protected gold nanoparticles of 4-5 nm core diameter by etching with excess glutathione. While etching at pH similar to 3 yielded Au-25, that at pH 7-8 yielded Au-8. 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.

引用

页码：333 / 340

页数：8

共 31 条

[21] Ligand exchange of Au25SG18 leading to functionalized gold clusters:: Spectroscopy, kinetics, and luminescence [J].