Naked oats-derived dual-emission carbon nanodots for ratiometric sensing and cellular imaging

Green synthesis of carbon nanodots from cotton for multicolor imaging, patterning, and sensing

“…When the excitation wavelength is changed from 330 nm to 488 nm, the maximum emission peak position shifts to longer wavelength, from 460 nm to 528 nm, and the fluorescence intensity decreases remarkably. Using quinine sulfate as the reference, the fluorescence QY of the CDs in aqueous solution is measured to be 14.8%, which is higher than other CDs derived from green method [34,[38][39][40][41].…”

“…Zhou et al [39] reported a completely green synthetic method for producing fluorescent nitrogen-doped CDs by hydrothermal treatment of milk with a QY of approximately 12%. Shuang et al [40] proposed a green and facile strategy for fabrication of dualemission CDs with a QY of 3.0% by pyrolysis and microwave process using naked oats as the precursor. Sun et al [41] demonstrated the use of flour as carbon source for microwave-assisted rapid green synthesis of CDs with a QY of approximately 5.4%.…”

One‐Step Synthesis of Fluorescent Carbon Dots for Bio‐Labeling Assay

“…Usually, the upconvertion photoluminescence was ascribed to the multi photon active process similar to the previously reported studies . The fluorescence quantum yield of the GSC‐dots was calculated to be about 9.27%, which is higher than the previous reported study . The pH dependent feature of the GSC‐dots (0.02 g mL −1 ) was studied at different pH which revealed that fluorescence (FL) intensity was barely changed in the region of pH value 5–9 at 360 nm excitation wavelength (Figure d).…”

UV light‐tunable fluorescent inks and polymer hydrogel films based on carbon nanodots and lanthanide for enhancing anti‐counterfeiting

“…Fluorescent carbon‐based materials, including carbon quantum dots (CDs), carbon nanodots (CNs), fluorescent carbon nanoparticles and fluorescent graphene etc., have drawn sustained attention in recent years due to their advantages of having excellent photoluminescence (PL) properties, superior chemical stability, biocompatibility, low toxicity and inexpensive and simple preparation methods . Typically, CNs consist of discrete and quasi‐spherical nanoparticles with sizes in the range of several to dozens of nanometers .…”