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J Am Chem Soc. 2008 Sep 3;130(35):11602-3. doi: 10.1021/ja804710r. Epub 2008 Aug 8.

Water-soluble Ag nanoclusters exhibit strong two-photon-induced fluorescence.

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1
School of Chemistry and Biochemistry and Petit Institute of Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia 30332-0400, USA.

Abstract

Water-soluble ssDNA-encapsulated Ag clusters exhibit large two-photon cross sections reaching 50 000 GM, with high quantum yields in the red and near-IR. Three distinct, spectrally pure, several atom clusters emitting at 660, 680, or 710 nm have been created with two-photon cross sections rivaling those of much larger water-soluble semiconductor quantum dots. Their stability, biocompatibility, and small size offer the promise of nontoxic, sensitive high-resolution biological imaging.

PMID:
18686957
PMCID:
PMC2766660
DOI:
10.1021/ja804710r
[Indexed for MEDLINE]
Free PMC Article
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