A label-free yellow-emissive carbon dot-based nanosensor for sensitive and selective ratiometric detection of chromium (VI) in environmental water samples

Fe-doped carbonized polymer dot-based fluorescent sensor with “turn-on” property for hydrazine hydrate detection

“…The lattice structure of the CPDs was analyzed by high-resolution transmission electron microscopy (HRTEM). Compared with the other literature, the CPDs had the same lattice fringes with a spacing of 0.22 nm, corresponding to the crystal planes of graphene, 36,37 as shown in Fig. 1(b).…”

A highly sensitive and selective on–off fluorescent sensor based on a complex of polySchiff-Fe2+ for Cr(vi) detection in an aqueous medium

“…The presence of oxygenated carbon atoms (C–O/C–OH) can be verified from the spectrum peak (531.83 eV) recorded for high-resolution O 1s. 30 Results from FT-IR and XPS analyses are consistent, suggesting that –NH 2 and –OH groups are present on PS-Fe 2+ , enabling PS-Fe 2+ to have excellent water solubility and potential further application prospects in organisms.…”

Nitrogen‐rich silicon quantum dots: facile synthesis and application as a fluorescent ‘on–off–on’ probe for sensitive detection of Hg2+ and cyanide ions

“…[25,26] To identify the surface functional groups presented in the NR-SiQDs, FTIR spectra were obtained (Figure 2a). The absorption peaks at 3683-3370 cm À1 were related to stretching vibrations of N-H and O-H, while the band at 1602 cm À1 was related to the stretching vibration and the bending vibration of N-H. [23,[27][28][29][30][31] The absorption bands at 1100 and 910 cm À1 were ascribed to the Si-O stretching vibration, while the band at 1049 cm À1 could be related to the Si-C deformation that proved the successful preparation of the SiQDs. [32][33][34][35] The band at 1260 cm À1 was associated with the C-O stretching vibration.…”