Rapid synthesis of highly luminescent and stable Au20 nanoclusters for active tumor-targeted imaging in vitro and in vivoElectronic supplementary information (ESI) available: Additional figures and tables. See DOI: 10.1039/c3nr05269a
Rapid synthesis of protein-stabilized Au 20 nanoclusters (Au 20 NCs) with high fluorescence quantum yield (QY) up to ∼15% is successfully achieved by manipulating the reaction kinetics. The as-obtained Au 20 NCs, identified by mass spectrometry, have an average size of 2.6 nm, with strong fluorescen...
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Main Authors | , , , , , |
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Format | Journal Article |
Language | English |
Published |
30.01.2014
|
Online Access | Get full text |
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Summary: | Rapid synthesis of protein-stabilized Au
20
nanoclusters (Au
20
NCs) with high fluorescence quantum yield (QY) up to ∼15% is successfully achieved by manipulating the reaction kinetics. The as-obtained Au
20
NCs, identified by mass spectrometry, have an average size of 2.6 nm, with strong fluorescence emission at 620 nm (2.00 eV) upon excitation at either 370 nm (3.35 eV) or 470 nm (2.64 eV). The advantages of the as-obtained Au
20
NCs, including small sizes, high fluorescence QY, excellent photostability, non-toxicity, and good stability in biological media, make them ideal candidates as good luminescent probes for optical imaging
in vitro
and
in vivo
. Our results demonstrate that the uptake of Au
20
NCs by both cancer cells and tumor-bearing nude mice can be improved by receptor-mediated internalization, compared with that by passive targeting. Because of their selective accumulation at the tumor sites, the Au
20
NC probes can be used as potential indicators for cancer diagnosis. This work not only provides a new understanding of the rapid synthesis of highly luminescent Au
20
NCs but also demonstrates that the functionalized-Au
20
NCs are excellent probes for active tumor-targeted imaging
in vitro
and
in vivo
.
Receptor-mediated uptake of nanoprobes for tumor-targeting
in vitro
and
in vivo
is systematically studied using newly prepared luminescent Au
20
nanoclusters. |
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Bibliography: | 10.1039/c3nr05269a Electronic supplementary information (ESI) available: Additional figures and tables. See DOI |
ISSN: | 2040-3364 2040-3372 |
DOI: | 10.1039/c3nr05269a |