Abstract
Modulation of the fluorescence lifetime (FLT) of CdTeSe/ZnS quantum dots (QDs) by near-IR (NIR) organic chromophores represents a new strategy for generating reproducible pH-sensing nanomaterials. The hybrid construct transfers the pH sensitivity of photolabile NIR cyanine dyes to highly emissive and long-lifetime pH-insensitive QDs, thereby inducing a reproducible FLT change from 29 ns at pH >7 to 12 ns at pH <5. This approach provides an unparalleled large dynamic FLT range for pH sensing at NIR wavelengths.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 4545-4548 |
| Number of pages | 4 |
| Journal | Journal of the American Chemical Society |
| Volume | 134 |
| Issue number | 10 |
| DOIs | |
| State | Published - Mar 14 2012 |
| Externally published | Yes |
ASJC Scopus subject areas
- Catalysis
- General Chemistry
- Biochemistry
- Colloid and Surface Chemistry