Are carbon dots worth the tremendous attention it is getting: Challenges and opportunities

In the last decade, research on 'carbon dot' (CD) has grown exponentially with its exhilarating aspects in biomedical, environmental remediation, energy-related applications, and many others. However, with the rampant pace of publications, few rudimentary questions over this nanoparticle have been overlooked and continued to be unanswered either consciously or unconsciously. Naturally, it is fostering a negative impact on CD research and confining its enormous potential within the laboratory. Herein, we have tried to decode the interconnected factors that are shackling further growth or transition of CD to industry and ultimately to market. Towards this, we have explicated the inconsistent nomenclature, multifarious synthesis precursors and approaches, the ambiguities over purification, and the nature of fluorescence. We have also audited the nanotoxicity issue of CD and elucidated why CD is disparate from its counterparts over nanotoxicity issues. Then we raised questions with a few examples on otherwise so mesmeric applications of CD. In a first of its kind, we have provided an industrial outlook of the CD and delineated paths to break the barrier. Overall, we believe attention to a few fundamental concerns associated with CD will accelerate its transition to mankind. (PE-FRONTEND) (C) 2021 Elsevier Ltd. All rights reserved.