Journal
GOLD BULLETIN
Volume 45, Issue 2, Pages 69-74Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s13404-012-0049-6
Keywords
Gold nanoclusters; Fluorescence; DNA; Dimethylamine borane; Template
Funding
- National Natural Science Foundation of China [21075112]
- Zhejiang Provincial Natural Science Foundation of China for Distinguished Young Scholars [R12B050001]
- Foundation of State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry [SKLEAC2010001]
- Scientific Research Foundation for Returning Overseas Chinese Scholars, State Education Ministry
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Water-soluble and red-emitting gold nanoclusters (Au NCs) were synthesized with single-stranded DNA as a promising biotemplate and dimethylamine borane as a mild reductant. The fluorescent Au NCs can be formed in a weakly acidic aqueous solution that is free from the simultaneous formation of large nanoparticles. The cluster feature of the formed Au species has been revealed by fluorescence spectra, absorption spectra, and transmission electron microscopy. Additionally, DNA sequences could be used to tune the Au NCs' emissions. The as-prepared Au NCs display high stability at physiological pH condition, and thus, wide potential applications are anticipated for the biocompatible fluorescent Au NCs serving as nanoprobes in bioimaging and related fields.
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