Abstract
In recent years, carbon dots (CDs) have emerged as a new class of zero-dimensional carbon nanostructures with sizes below 10nm, and have gradually become a rising star in nanochemistry, due to their physicochemistry, biocompatibility, and strong tunable photoluminescence. As a result, CDs have proved to be attractive candidates for biomolecule sensing and cell imaging. In this fascinating and wide framework we have described the photo- and electron properties of CDs and their applications as optical probes for biomolecule sensing. We highlight here their importance, especially with the aim of biosensing and cell labeling by using CDs as probes. We then briefly present the state of the art and the progress both in biomolecule sensing and cell imaging. We present many recent examples, organized into two main sections, the first deals with the CDs as fluorescent probes for biomolecule sensing and the second deals with the CDs as cell labels for imaging of various cells.
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