Dual recognition strategy for ultra-sensitive fluorescent detection of Hg2+ at femto-molar level based on aptamer functionalized sulfur quantum dots

Fluorescent chemosensors facilitate the visualization of plant health and their living environment in sustainable agriculture

“…30a). 182 Fluorescence sensing technology based on S QDs could also selectively detect Hg 2+ , Fe 3+ and Cu 2+ in water samples (chemosensor 111 and 112 ). 183,184 111 showed excellent reducibility and it could reduce Cu 2+ and Fe 3+ to Cu + and Fe 2+ , respectively, which indicated that 111 may be an effective tool for detecting the redox state transition of ions.…”

Shaping Sulfur Precursors to Low Dimensional (0D, 1D and 2D) Sulfur Nanomaterials: Synthesis, Characterization, Mechanism, Functionalization, and Applications

“…Since sulfur atoms have a lone pair of electrons which exhibits an affinity for metal ions and forms stable compound by forming SMS bonds. [90,[112][113][114] As shown in Figure 23a, Qiao et al [48] prepared blue SQDs and evaluated its interaction with Hg 2+ ions. Upon the addition of Hg 2+ , the SQDs solution changed from colorless to black.…”

Two-photon excited luminescence of sulfur quantum dots for heavy metal ion detection

“…Owing to their tunable optical properties, these zero-dimensional semiconductor nanoparticles can be efficiently utilized as uorescent sensors, providing high sensitivity and selectivity, as well as rapid response to a variety of analytes. [10][11][12][13] One of the most researched classes of QDs are cadmium-based QDs (e.g. CdSe, CdTe, CdS).…”

“…29 Furthermore, uorescent probes based on SQDs were also successfully employed for rapid and sensitive detection of copper, lead, bismuth and mercury ions. 12,30,31 The development of SQDs as sensors remains an active area of research and different strategies to enhance the stability, sensitivity, and selectivity of SQDs for detection purposes are still being explored. On the other hand, signicant efforts are nowadays put on developing two-photon active sensors since they offer substantial advantages that can contribute to improved detection capabilities, particularly valuable in biomedical research, diagnostics and environmental monitoring.…”