Facile synthesis of carboxymethyl cellulose sulfur quantum dots for live cell imaging and sensitive detection of Cr(VI) and ascorbic acid

Photoluminescence investigations of sulfur quantum dots synthesized by a bubbling-assisted strategy

“…7,8 However, distinct differences from traditional chalcogenide QDs are relatively broad emission bands, excitation energy-dependent emission maximum, and short PL lifetimes. [9][10][11] These phenomena suggest that the quantum connement theory is not fully applicable to explain their PL behaviours. Furthermore, the size and surface groups pose signicant challenges to regulating the synthesis, surface structure, and size of S-dots and unveiling their emission mechanism.…”

Sensitive and selective determination of tetracycline in milk based on sulfur quantum dot probes

“…3A , a weak peak observed at 259 nm is possibly belonged to the n–π* transition of S atoms. 38 The fluorescence emission spectra of SQDs provided in Fig. 3B demonstrate excitation-dependent emission behavior, in which the emission intensity gradually enhances when the excitation wavelengths increase from 315 to 355 nm and then declines as excitation wavelengths further increase from 355 to 395 nm, accompanied by a red shift from 433 to 464 nm.…”

Synthesis of Fluorescent Sulfur Quantum Dots for Bioimaging and Biosensing

“…This is because O 2 can oxidize Sx 2− ions to zero-valent S atoms ( Figure 1D ). Under the condition of oxygen acceleration, they also synthesized SQDs by using different stabilizers such as carboxymethyl cellulose (CMC) ( Duan et al, 2020 ), polyvinyl alcohol (PVA) ( Lei et al, 2021 ), and hydroxypropyl-β-cyclodextrin (HP-β-CD) ( Huang et al, 2021a ). It was found that different stabilizers can endow the SQDs with distinct surface properties.…”