Green-Emitting Carbon Dots as Fluorescent Probe for Nitrite Detection

MXene quantum dots for ratiometric fluorescence detection of a Bacillus anthracis biomarker

“…2b, the absorption band around 3407 cm −1 corresponded to the O–H bond, and both MXene and MQDs contained abundant O–H groups. 33,44 After the acid oxidation and hydrothermal process, MQDs possess abundant hydrophilic functional groups, resulting in their favorable water solubility. 31 Two new stretching vibration peaks at 2031 cm −1 and 1374 cm −1 corresponded to the N–H bond and the O–H bond.…”

Real-Time Imaging of Stress in Single Spherulites and Its Relaxation at the Single-Particle Level in Semicrystalline Polymers

“…3.0 μm (Figure S3), facilitating the dense enrichment of fluorescent CDs (2.0 nm) and the clear single-particle imaging. The as-prepared CDs with negative charges as a result of the presence of abundant carboxyl groups could be adsorbed on the surface of positively charged aminated SiO 2 particles by electrostatic attraction. − The obtained CD/SiO 2 and the aminated SiO 2 particles were characterized using FTIR spectroscopy (Figure c). In comparison to the aminated SiO 2 particles, the CD/SiO 2 particles showed a new absorption band near 1012 cm –1 , which corresponded to the C–O–C bending vibrations of fluorescent CDs. , Moreover, ζ potentials of the CDs, SiO 2 , and CD/SiO 2 particles were measured to be −8.4, 71.3, and 46.3 mV, respectively (Figure d).…”

Molecular imprinting-based ratiometric fluorescence sensors for environmental and food analysis

“…CDs possess numerous advantages like simple preparation, low cost, environmental friendliness, high quantum yield, low cytotoxicity, and marvelous biocompatibility. 42,43,53 Liu et al 54 constructed a MI-RFL sensor, which functioned by FRET between photoluminescent CDs and 4-nitrophenol (4-NP), to detect 4-NP in water samples. Fu et al 55 used CDs as fluorescence sources and constructed MI-RFL sensors for detecting phycoerythrin (PE).…”