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      Sequential Growth of NaYF4:Yb/Er@NaGdF4 Nanodumbbells for Dual-Modality Fluorescence and Magnetic Resonance Imaging.

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          Abstract

          Upconversional core-shell nanostructures have gained considerable attention due to their distinct enhanced fluorescence efficiency, multifunctionality, and specific applications. Recently, we have developed a sequential growth process to fabricate unique upconversion core-shell nanoparticles. Time evolution of morphology for the NaYF4:Yb/Er@NaGdF4 nanodumbbells has been extensively investigated. An Ostwald ripening growth mechanism has been proposed to illustrate the formation of NaYF4:Yb/Er@NaGdF4 nanodumbbells. The hydrophilic NaYF4:Yb/Er@NaGdF4 core-shell nanodumbbells exhibited strong upconversion fluorescence and showed higher magnetic resonance longitudinal relaxivity (r1 = 7.81 mM-1 s-1) than commercial contrast agents (Gd-DTPA). NaYF4:Yb/Er@NaGdF4 nanodumbbells can serve as good candidates for high efficiency fluorescence and magnetic resonance imaging.

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          Author and article information

          Journal
          ACS Appl Mater Interfaces
          ACS applied materials & interfaces
          American Chemical Society (ACS)
          1944-8252
          1944-8244
          Mar 22 2017
          : 9
          : 11
          Affiliations
          [1 ] Department of Immunology, Department of Pathogen Biology, Provincial Laboratories of Pathogen Biology and Zoonoses Anhui, and Clinical Laboratory of the First Affiliated Hospital, Anhui Medical University , Hefei, Anhui 230022, China.
          [2 ] Department of Blood Transfusion, The First Affiliated Hospital of Anhui Medical University , Hefei, Anhui 230022, China.
          [3 ] Department of Radiology, Anhui Provincial Hospital , Hefei, Anhui 230001, China.
          Article
          10.1021/acsami.6b16842
          28244317
          81a23694-51fe-408b-93a9-4a3e149bfb6a
          History

          MR imaging compatibility,nanodumbbells,sequential growth,upconversion nanoparticles

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