| Literature DB >> 28244317 |
Hui-Qin Wen1,2, Huang-Yong Peng, Kun Liu, Mao-Hong Bian2, Yun-Jun Xu3, Liang Dong, Xu Yan3, Wei-Ping Xu3, Wei Tao, Ji-Long Shen1, Yang Lu, Hai-Sheng Qian.
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.Entities:
Keywords: MR imaging compatibility; nanodumbbells; sequential growth; upconversion nanoparticles
Year: 2017 PMID： 28244317 DOI： 10.1021/acsami.6b16842
Source DB: PubMed Journal: ACS Appl Mater Interfaces ISSN： 1944-8244 Impact factor: 9.229