Water-soluble Ag nanoclusters exhibit strong two-photon-induced fluorescence |
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| Authors: | Patel Sandeep A Richards Chris I Hsiang Jung-Cheng Dickson Robert M |
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| Affiliation: | School of Chemistry and Biochemistry and Petit Institute of Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia 30332-0400, USA. |
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| 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. |
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