Recent advances in the rare earth metal doped nanomaterials and their applications in biomedical imaging techniques.

A possible technique for giving different materials new properties is impurity doping. Since the 18th century, rare-earth ions have been thoroughly investigated as active dopants in inorganic crystal lattices because of their distinctive optical, magnetic, and electrical capabilities. Rare-earth doping can change doped nanomaterials' size, shape, and crystallographic phase, producing tunable optical responses and improved mechanical and electronic functionalities. Additionally, rare-earth doping can significantly enhance energy conversion and harvesting via tunable and scalable control over doped nanomaterials' final electrical and catalytic performance. A comprehensive repertoire of functional nanomaterials for real-world applications must first be developed, which requires a greater understanding of the crucial role played by rare-earth doping. Different rare earth-doped nanomaterials have been extensively studied for their applications in NIR Bioimaging, photocatalytic activity, bone tissue engineering and implantology, ceramics and composites, micro/nano-electronics, and many more. From the extensive literature survey, it was thought noteworthy to collect and report some of the very recent(period of 2020-2022) synthesized rare-earth doped nanomaterials and their applications in a concise manner in this short review paper. [ABSTRACT FROM AUTHOR]