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

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.

SUBMITTER: Patel SA 

PROVIDER: S-EPMC2766660 | biostudies-literature | 2008 Sep

REPOSITORIES: biostudies-literature