Preparation of Polysaccharide Nanocrystal‐Based Nanocomposites

A fluorescent DNAzyme-based biosensor for the detection of lead ions using carbon quantum dots prepared from grapefruit peel

“…Since its chemical composition is mainly protein and fiber, it can be used as an excellent carbon source for the preparation of CQDs. 35 Herein, G-CQDs with good optical properties were prepared using grapefruit peel, and they are an ideal candidate to obtain the fluorescence signal. The most critical feature of this strategy is that the fluorescence of G-CQDs was quenched after binding with hemin and it was recovered after removing hemin by combining with G-quadruplex.…”