02193nas a2200205   4500008004100000022001400041245018100055210006900236260000800305300001600313490000700329520137200336100002601708700001601734700002601750700003101776700002801807700002701835856012501862       2025                        eng d  a0743-746300aPrecursor-dependent heteroatom diversity in luminescent carbon quantum dots: their impact on physicochemical properties and free radical scavenging and antibacterial activities0 aPrecursordependent heteroatom diversity in luminescent carbon qu  cSEP  a24281-242940 v413 a<p>
	The fabrication of a multifunctional carbon quantum dot (CQD) from a novel carbon source is still continuing to be demanding and fascinating. The carbon precursor plays a crucial role in developing any particular properties of a CQD to suit a specific application. In this study, green (Rhus chinensis fruits) as well as chemical-based (ascorbic acid and urea) carbon sources were used for the fabrication of CQDs using a simple, cost-effective, and eco-friendly method. The various physicochemical and optical properties of R. chinensis fruit-derived CQD (CQD-RCF) and urea-assisted ascorbic acid-derived CQD (CQD-AAU) were thoroughly investigated by using multiple characterization techniques such as XRD, TEM, HR-TEM, Raman, XPS, FT-IR, UV-vis, PL, and zeta potential. The synthesized CQDs were screened for antioxidant properties by a DPPH assay and antibacterial activity by the agar tip-well method. Both of these synthesized CQDs exhibited a variety of dissimilarities regarding their heteroatom compositions and surface functional groups, which subsequently led to an enhanced DPPH radical scavenging efficacy of CQD-AAU and a declared antibacterial efficacy of CQD-RCF. Therefore, the outcome of this study shows that the physicochemical properties and functionalities of CQDs are influenced by the chemical composition of the precursor material.</p>
1 aKonwar, Pollab, Mohan1 aDevi, Suman1 aPandey, Satish, Kumar1 aDevi, Khomdram, Sandhyaran1 aDevi, Ayekpam, Bimolini1 aLuwang, Meitram, Niraj  uhttps://library.ncl.res.in/content/precursor-dependent-heteroatom-diversity-luminescent-carbon-quantum-dots-their-impact