Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 130, Issue 35, Pages 11602-+Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja804710r
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Funding
- NIH [R01-GM068732, P20-GM072021]
- NIH R. Kirchenstein NRSA [F31EB008324]
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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.
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