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As a kind of star materials, two-dimensional (2D) nanomaterials have attracted tremendous attention for their unique structures, excellent performance and wide applications. In recent years, layered rare earth-based or doped nanomaterials have become a new important member of the 2D nanomaterials family and have attracted significant interest, especially the layered rare earth hydroxides (LREHs) and layered rare earth-doped perovskites with anion-exchangeability and exfoliative properties. In this review, we systematically summarize the synthesis, exfoliation, fabrication and biomedical applications of the 2D rare earth nanomaterials. Upon exfoliation, the LREHs and layered rare earth-doped perovskites can be dimensionally reduced to ultrathin nanosheets which feature high anisotropy and flexibility. Subsequent fabrication, especially superlattice assembly, enables rare earth nanomaterials with diverse compositions and structures, which further optimizes or even creates new properties and thus expands the application fields. The latest progress in biomedical applications of the 2D rare earth-based or doped nanomaterials and composites are also reviewed in detail, especially drug delivery and magnetic resonance imaging (MRI). Moreover, at the end of this review, we provide an outlook on the opportunities and challenges of the 2D rare earth-based or doped nanomaterials. We believe this review will promote increasing interest in 2D rare earth materials and provide more insight into the artificial design of other nanomaterials based on rare earth elements for functional applications.

Rights:

• cc-by-3.0
  

Keyword: Two-dimensional (2D) nanomaterials, Rare earth, Drug delivery, Magnetic resonance imaging (MRI)

Date published: 2024-09-19

Publisher: Royal Society of Chemistry (RSC)

Journal:

• Chemical Science (ISSN: 20416520) vol. 15 issue. 41 p. 16887-16907

Funding:

• Japan Society for the Promotion of Science 22H01916
• Japan Society for the Promotion of Science 22K18956
• National Natural Science Foundation of China U20A20123
• Chongqing Municipal Education Commission KJQN202301134
• Chongqing Municipal Education Commission KJQN202301133

Manuscript type: Publisher's version (Version of record)

MDR DOI:

First published URL: https://doi.org/10.1039/d4sc02625j

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Updated at: 2024-10-25 16:30:33 +0900

Published on MDR: 2024-10-25 16:30:33 +0900