Graphene‐Oxide‐Modified Lanthanide Nanoprobes for Tumor‐Targeted Visible/NIR‐II Luminescence Imaging. Issue 52 (8th November 2019)

• Record Type: Journal Article
• Authors: Song, Xiaorong; Li, Shihua; Guo, Hanhan; You, Wenwu; Shang, Xiaoying; Li, Renfu; Tu, Datao; Zheng, Wei; Chen, Zhuo; Yang, Huanghao; Chen, Xueyuan
• Is Part Of: Angewandte Chemie international edition. Volume 58:Issue 52(2019)
• Page Start: 18981
• Page End: 18986
• Publication Date: 2019-11-08
• Subjects: graphene oxide -- lanthanides -- luminescent nanoprobes -- NIR-II bioimaging -- tumor targeting; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.201909416
• Languages: English
• ISSNs: 1433-7851

Abstract

Abstract: The synthesis of hydrophilic lanthanide‐doped nanocrystals (Ln 3+ ‐NCs) with molecular recognition ability for bioimaging currently remains a challenge. Herein, we present an effective strategy to circumvent this bottleneck by encapsulating Ln 3+ ‐NCs in graphene oxide (NCs@GO). Monodisperse NCs@GO was prepared by optimizing GO size and core–shell structure of NaYF4 :Yb, Er@NaYF4, thus combining the intense visible/near‐infrared II (NIR‐II) luminescence of NCs and the unique surface properties and biomedical functions of GO. Such nanostructures not only feature broad solvent dispersibility, efficient cell uptake, and excellent biocompatibility but also enable further modifications with various agents such as DNA, proteins, or nanoparticles without tedious procedures. Moreover, we demonstrate in proof‐of‐concept experiments that NCs@GO can realize simultaneous intracellular tracking and microRNA‐21 visualization, as well as highly sensitive in vivo tumor‐targeted NIR‐II imaging at 1525 nm. Abstract : Flow with the GO : A graphene‐oxide‐modified luminescent lanthanide nanoprobe was developed that exhibited excellent dispersibility and biocompatibility and permitted facile surface modifications with DNA, protein, or nanoparticles. The nanoprobe can be tailored for simultaneous intracellular tracking and microRNA‐21 visualization, as well as highly sensitive NIR‐II imaging of mice tumors.