Cadmium telluride quantum dots as pH-sensitive probes for tiopronin determination

Fluorescent nanoparticles for chemical and biological sensing

“…Thus, the mercaptoacetic acidcapped QDs with pH dependent photoluminescence have been used for cellular pH monitoring. The use of pH-sensitive thioalkyl functionalized QDs was also successful in the following enzymatic reactions, by monitoring the hydrolysis of glycidyl butyrate catalyzed by porcine pancreatic lipase [60], and in the quantification of drugs [61]. However, the approach of measuring fluorescence intensity is limited to some interference factors such as source intensity fluctuations, photobleaching, or orientation of the sensor patch.…”

Study on fluorescence properties of carbogenic nanoparticles and their application for the determination of ferrous succinate

“…Ferric chloride hexahydrate standard (labeled purity Z99%) was purchased from Sigma-Aldrich Company. CdTe QDs were locally synthesized via the method described in our previous work [17]. Tris-HCl buffer solution (0.05 mol L À 1 ) containing 0.1 mol L À 1 NaCl was freshly prepared.…”

Challenges and Perspectives of Optical Nanoprobes

“…For example, monodispersed gold or silver nanoparticles (NPs)-based colorimetric probes themselves are likely to aggregate in ionic buffers and lose sensing ability. The fluorescence of quantum dots (QDs) is sensitive to a variety of substances in environment or in physiological matrix such as H + , Fe 3+ , and H 2 O 2 [2,3]. Therefore, the selectivity for real sample detection is very hard to achieve when using QDs-based nanoprobes.…”