Portable smartphone platform integrated with paper strip-assisted fluorescence sensor for ultrasensitive and visual quantitation of ascorbic acid

The effect of triethylamine on dye-sensitized upconversion luminescence and its application in nanoprobes and photostability

“…The low or excessive levels of AA can result in loose teeth, scurvy, inflammation, even cancer. [46][47][48] Inspired by the influence mechanism of TEA on upconversion luminescence, we developed a new upconversion nanoprobe for the detection of AA. Addition of various concentrations of AA to CyBSO-sensitized UN heptanol solution without TEA has little effect on the upconversion luminescence (Fig.…”

Organosilicon‐Based Carbon Dots and Their Versatile Applications

“…Reproduced with permission. [49] Copyright 2022, Elsevier. f) Schematic diagram of synthetic Si-CDs for the detection of Fe 3+ ions.…”

“…Desai et al [55] reported Si-CDs for the detection of Fe 3+ , and the complexes formed by Si-CDs resulted in significant fluorescence quenching due to the high affinity of amino and hydroxyl functional groups for Fe 3+ (Figure 8f). Similarly, Li et al [49] synthesized Si-NCDs for the detection of Fe 3+ . In addition, they found that ascorbic acid (AA) contains an enediol moiety, which has a strong reducing ability to reduce Fe 3+ to Fe 2+ .…”

Portable smartphone platform based on Ti3C2 MQDs/CDs assembly for ratiometric fluorescence quantitative monitoring of crystal violet

“…39,40 Moreover, benefiting from the portability and practicality of smartphones, digital image colorimetry technology combined with the fluorescence method has made a contribution to quantitative analysis. 41–43 That is, red-green-blue (RGB) channel values reflected in images have been utilized in linear fitting to the concentration of analytes. 44,45…”

“…39,40 Moreover, beneting from the portability and practicality of smartphones, digital image colorimetry technology combined with the uorescence method has made a contribution to quantitative analysis. [41][42][43] That is, red-green-blue (RGB) channel values reected in images have been utilized in linear tting to the concentration of analytes. 44,45 Herein, a novel dual-emission ratiometric uorescence strategy based on Ti 3 C 2 MQDs and CDs was developed for the selective, rapid and visual detection of CV with a smartphone application (Scheme 1).…”