Understanding the aggregation of excitation wavelength independent emission of amphiphilic carbon dots for bioimaging and organic acid sensing

Innovations in the Solid‐State Fluorescence of Carbon Dots: Strategies, Optical Manipulations, and Applications

“…The polymer materials used for physical dispersion vary depending on the functional groups on the surface of the CDs. These polymer matrices mainly include: polyvinyl alcohol (PVA), [63][64][65][66][67][68][69][70][71][72][73] polyvinylpyrrolidone (PVP), [34,[74][75][76][77][78][79][80][81] polyvinyl butyral (PVB), [82][83][84] polymethyl methacrylate (PMMA), [30,[85][86][87][88][89][90] polydimethylsiloxane (PDMS), [91][92][93] polyethylene glycol (PEG), [32,[94][95][96] polyurethane (PU), [97,98] polyamide (PA), [99] polystyrene (PS), [100] polyvinyl carbazole (PVK), [101] and epoxy resins. [102,103] In a suitable concentration range, the polymer matrix can effectively support SSF by inhibiting the aggregation of the CDs and thus suppressing non-radiative transitions.…”

Room temperature cost-effective synthesis of carbon quantum dots for fluorescence pattern recognition of metal ions

“…29,30 Generally, the methods of synthesizing CDs can be mainly divided into two types: top-down and bottom-up. The topdown method mainly includes arc discharge, laser ablation, electrooxidation, and oxidative acid treatment, [31][32][33] while the bottom-up method mainly includes the hydrothermal, microwave-assisted, and solvothermal methods. 16,34,35 These procedures frequently need huge quantities of heavy laboratory equipment, large number of reagents and heat, all of which carry potential risks.…”

One-step synthesis of orange–red emissive carbon dots: photophysical insight into their excitation wavelength-independent and dependent luminescence

“…Our previous research used a mild oxidation strategy for carbonization to produce excitation wavelength-dependent emissive CDs (400-600 nm) with low F f 31 and excitation wavelength-independent emissive CDs (yellow emission 560 nm and green emission 500 nm) with high F f , i.e. 9-32% 32 from banana peel extract. We further demonstrated that NaCl and PMMA matrixes could effectively overcome the aggregation-caused quenching (ACQ) of CDs in the solid state.…”

“…We further demonstrated that NaCl and PMMA matrixes could effectively overcome the aggregation-caused quenching (ACQ) of CDs in the solid state. 32 These CDs-NaCl crystals were successfully implemented for white light generation and Fabry-Perot mode of lasing applications. 31 Our previously reported yellow and green emissive CDs were amphiphilic, and importantly, they exhibited excitation wavelength-independent emission in both polar and non-polar solvents.…”

“…31 Our previously reported yellow and green emissive CDs were amphiphilic, and importantly, they exhibited excitation wavelength-independent emission in both polar and non-polar solvents. 32 In application, it demonstrated organic acid sensing with naked-eye detection under UV 365 nm illumination and potential bioimaging applications. 32 The current research further develops the previous work to demonstrate CD's excitation wavelength-independent orange-red emission.…”