| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1410129 | Journal of Molecular Structure | 2011 | 5 Pages |
Water-soluble CdTe QDs modified by thioglycolic acid were synthesized with a facile one-pot method. Two-photon excited fluorescence spectroscopic technique was used to study the interaction between TGA-capped CdTe quantum dots and folic acid. Experiments results showed that the two-photon fluorescence of TGA-capped CdTe QDs in PBS buffer solution was quenched in the presence of folic acid. A good linear relationship was observed between the two-photon fluorescence intensity of TGA-capped CdTe QDs and the concentration of folic acid. The two-photon excited fluorescence quenching mechanism was also presented.
► Two-photon excited fluorescence has minimum autofluorescence interference. ► The technique has wider linear range of detecting FA. ► The technique has better precision. ► Application of two-photon excited fluorescence broadens.
