Carbon dots-based fluorescent probe for trace Hg2+ detection in water sample

Facile Synthesis of Nitrogen-Doped Carbon Quantum Dots with Chitosan for Fluorescent Detection of Fe3+

“…Moreover, with the increase in excitation wavelength, the fluorescence intensity of N-CQDs first increased and then decreased, accompanied by a red shift, reaching its maximum at the excitation wavelength of 330 nm. Some works on carbon dots also indicate that the optical properties of carbon dots possibly correspond to fluorescent surface groups [36,37,38]. Additionally, it should be pointed out that the prepared N-CQDs exhibit excellent water solubility and high stability at room temperature.…”

Facile and large-scale synthesis of green-emitting carbon nanodots from aspartame and the applications for ferric ions sensing and cell imaging

“…And the sharp peak at 1,664 cm À1 corresponds to C@O stretching vibrations of the carboxylic group [30]. Two characteristic peaks at 1,399 and 1,317 cm À1 are attributed to CAN and CAO stretching vibrations, respectively [31]. In addition, the peaks in the range of 900À650 cm À1 are associated with out-of-plane bending vibrations of OAH and NAH.…”

Templated microwave synthesis of luminescent carbon nanofibers

“…The selective detection of metal ions is challenging, especially as the origin of the quenching interactions of Cdots is unproven and many theories, including static quenching, dynamic quenching FRET and PET, have been used to explain these processes. [85][86][87] In the case of the carbon bers the quenching by Co(II), Cu(II), Fe(II) and Fe(III) may indicate interaction with oxygen rich species. While the lack of signicant quenching in the case of Zn(II) may be due to interaction with surface amine groups, which has previously been observed to results in enhancement of Cdot emission.…”